0001486957-23-000008 | 10-K | XBRL Viewer

Long-Term Debt

12 Months Ended

Dec. 31, 2022

LONG-TERM DEBT

Our Long-Term Debt consists of the following:


	December 31,
	2022		2021
	(In thousands)
Debt Instruments:
Senior Notes	$	800,000	$	800,000
Credit Facility	500,000		—
Former Credit Facility	—		400,000
Less: Amounts due within one year	6,250		—
Long-Term Debt, gross	1,293,750		1,200,000
Less: Deferred debt issuance costs	11,126		10,696
Long-Term Debt	$	1,282,624	$	1,189,304

Maturities of Long-Term Debt subsequent to December 31, 2022 were as follows: 2023 – $6.3 million; 2024 – $6.3 million; 2025 – $12.5 million; 2026 – $12.5 million; 2027 – $462.5 million; and thereafter – $800.0 million.

Credit Facility

On October 12, 2022, we entered into an Amended and Restated Credit Agreement (the "Credit Facility") with Wells Fargo Bank, National Association, as administrative agent, and the other lenders party thereto, which amended and restated our then existing secured credit facility (the "Former Credit Facility"), which consisted of a $750 million senior secured revolving credit facility. The Credit Facility consists of a $750 million senior secured revolving credit facility (the "Revolving Credit Facility") and a $250 million senior secured term A loan (the "Term Loan"). The Revolving Credit Facility and the Term Loan are scheduled to mature on October 12, 2027. All proceeds from the Term Loan were used to repay outstanding indebtedness under the Former Credit Facility. The proceeds of loans under the Credit Facility are available for working capital needs, permitted acquisitions and other general corporate purposes.

The Credit Facility allows for additional parties to become lenders and, subject to certain conditions, for the increase of the commitments under the Credit Facility, subject to an aggregate maximum for all additional commitments of (1) the greater of (a) $400 million and (b) 100% of EBITDA, as defined in the Credit Facility, for the last four full fiscal quarters, plus (2) all voluntary prepayments of the Term Loan, plus (3) additional amounts provided the Company is in compliance with a pro forma first lien leverage ratio test of less than or equal to 2.50 to 1.00.

The Company's obligations under the Credit Facility are guaranteed, subject to certain exceptions, by substantially all of the Company's present and future wholly owned domestic restricted subsidiaries. The Credit Facility is secured by first-priority liens on certain assets owned by the Company and its subsidiary guarantors (other than its subsidiaries comprising a portion of its Government Operations segment).

The Credit Facility requires interest payments on outstanding loans on a periodic basis until maturity. We are required to make quarterly amortization payments on the Term Loan in an amount equal to (i) 0.625% of the initial aggregate principal amount of the Term Loan on the last business day of each quarter beginning the quarter ending March 31, 2023 and ending the quarter ending December 31, 2024 and (ii) 1.25% of the initial aggregate principal amount of the Term Loan on the last business day of each quarter ending after December 31, 2024, with the balance of the Term Loan due at maturity. We may prepay all loans under the Credit Facility at any time without premium or penalty (other than customary Term SOFR breakage costs), subject to notice requirements.

The Credit Facility includes financial covenants that are evaluated on a quarterly basis, based on the rolling four-quarter period that ends on the last day of each fiscal quarter. The maximum permitted leverage ratio is 4.00 to 1.00, which may be increased to 4.50 to 1.00 for up to four consecutive fiscal quarters after a material acquisition. The minimum consolidated

interest coverage ratio is 3.00 to 1.00. In addition, the Credit Facility contains various restrictive covenants, including with respect to debt, liens, investments, mergers, acquisitions, dividends, equity repurchases and asset sales. As of December 31, 2022, we were in compliance with all covenants set forth in the Credit Facility.

Outstanding loans under the Credit Facility bear interest at our option at either (1) the Term SOFR plus a credit spread adjustment of 0.10% plus a margin ranging from 1.0% to 1.75% per year or (2) the base rate plus a margin ranging from 0.0% to 0.75% per year. We are charged a commitment fee on the unused portion of the Revolving Credit Facility, and that fee ranges from 0.15% to 0.225% per year. Additionally, we are charged a letter of credit fee of between 1.0% and 1.75% per year with respect to the amount of each financial letter of credit issued under the Revolving Credit Facility, and a letter of credit fee of between 0.75% and 1.05% per year with respect to the amount of each performance letter of credit issued under the Revolving Credit Facility. The applicable margin for loans, the commitment fee and the letter of credit fees set forth above will vary quarterly based on our consolidated total net leverage ratio. The margin for Term SOFR and base rate loans was 1.50% and 0.50%, respectively, the letter of credit fee for financial letters of credit and performance letters of credit was 1.50% and 0.90%, respectively, and the commitment fee for the unused portion of the Revolving Credit Facility was 0.20% from the closing date through the date of our delivery of the compliance certificate for the fiscal quarter ended December 31, 2022.

As of December 31, 2022, borrowings under our Term Loan totaled $250.0 million, borrowings and letters of credit issued under the Revolving Credit Facility totaled $250.0 million and $2.5 million, respectively, and we had $497.5 million available under the Revolving Credit Facility for borrowings and to meet letter of credit requirements. As of December 31, 2022, the weighted-average interest rate on outstanding borrowings under our Credit Facility was 5.93%.

The Credit Facility generally includes customary events of default for a secured credit facility. Under the Credit Facility, (1) if an event of default relating to bankruptcy or other insolvency events occurs with respect to the Company, all related obligations will immediately become due and payable; (2) if any other event of default exists, the lenders will be permitted to accelerate the maturity of the related obligations outstanding; and (3) if any event of default exists, the lenders will be permitted to terminate their commitments thereunder and exercise other rights and remedies, including the commencement of foreclosure or other actions against the collateral.

If any default occurs under the Credit Facility, or if we are unable to make any of the representations and warranties in the Credit Facility, we will be unable to borrow funds or have letters of credit issued under the Credit Facility.

Senior Notes due 2026

We issued $400 million aggregate principal amount of 5.375% senior notes due 2026 (the "Senior Notes due 2026") pursuant to an indenture dated May 24, 2018, among the Company, certain of our subsidiaries, as guarantors, and U.S. Bank National Association, as trustee. On July 15, 2021, using cash on hand and borrowings under the Former Credit Facility, we redeemed the Senior Notes due 2026 at a redemption price equal to 102.688% of the principal amount, resulting in an early redemption premium of $10.8 million and the write-off of deferred debt issuance costs totaling $4.2 million. These charges were recorded in our consolidated statement of income during the year ended December 31, 2021 as components of Other – net and Interest expense, respectively.

Senior Notes due 2028

We issued $400 million aggregate principal amount of 4.125% senior notes due 2028 (the "Senior Notes due 2028") pursuant to an indenture dated June 12, 2020 (the "2020 Indenture"), among the Company, certain of our subsidiaries, as guarantors, and U.S. Bank Trust Company, National Association (formerly known as U.S. Bank National Association) ("U.S. Bank"), as trustee. The Senior Notes due 2028 are guaranteed by each of the Company's present and future direct and indirect wholly owned domestic subsidiaries that is a guarantor under the Credit Facility.

Interest on the Senior Notes due 2028 is payable semi-annually in cash in arrears on June 30 and December 30 of each year at a rate of 4.125% per annum. The Senior Notes due 2028 will mature on June 30, 2028.

We may redeem the Senior Notes due 2028, in whole or in part, at any time on or after June 30, 2023 at a redemption price equal to (i) 102.063% of the principal amount to be redeemed if the redemption occurs during the 12-month period beginning on June 30, 2023, (ii) 101.031% of the principal amount to be redeemed if the redemption occurs during the 12-month period beginning on June 30, 2024 and (iii) 100.0% of the principal amount to be redeemed if the redemption occurs on or after June 30, 2025, in each case plus accrued and unpaid interest, if any, to, but excluding, the redemption date. At any time prior to June 30, 2023, we may also redeem up to 40.0% of the Senior Notes due 2028 with net cash proceeds of certain equity offerings at a redemption price equal to 104.125% of the principal amount of the Senior Notes due 2028 to be redeemed, plus

accrued and unpaid interest, if any, to, but excluding, the redemption date. In addition, at any time prior to June 30, 2023, we may redeem the Senior Notes due 2028, in whole or in part, at a redemption price equal to 100.0% of the principal amount of the Senior Notes due 2028 to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date plus an applicable "make-whole" premium.

The 2020 Indenture contains customary events of default, including, among other things, payment default, failure to comply with covenants or agreements contained in the 2020 Indenture or the Senior Notes due 2028 and certain provisions related to bankruptcy events. The 2020 Indenture also contains customary negative covenants. As of December 31, 2022, we were in compliance with all covenants set forth in the 2020 Indenture and the Senior Notes due 2028.

Senior Notes due 2029

We issued $400 million aggregate principal amount of 4.125% senior notes due 2029 (the "Senior Notes due 2029") pursuant to an indenture dated April 13, 2021 (the "2021 Indenture"), among the Company, certain of our subsidiaries, as guarantors, and U.S. Bank, as trustee. The Senior Notes due 2029 are guaranteed by each of the Company's present and future direct and indirect wholly owned domestic subsidiaries that is a guarantor under the Credit Facility.

Interest on the Senior Notes due 2029 is payable semi-annually in cash in arrears on April 15 and October 15 of each year at a rate of 4.125% per annum. The Senior Notes due 2029 will mature on April 15, 2029.

We may redeem the Senior Notes due 2029, in whole or in part, at any time on or after April 15, 2024 at a redemption price equal to (i) 102.063% of the principal amount to be redeemed if the redemption occurs during the 12-month period beginning on April 15, 2024, (ii) 101.031% of the principal amount to be redeemed if the redemption occurs during the 12-month period beginning on April 15, 2025 and (iii) 100.0% of the principal amount to be redeemed if the redemption occurs on or after April 15, 2026, in each case plus accrued and unpaid interest, if any, to, but excluding, the redemption date. At any time prior to April 15, 2024, we may also redeem up to 40.0% of the Senior Notes due 2029 with net cash proceeds of certain equity offerings at a redemption price equal to 104.125% of the principal amount of the Senior Notes due 2029 to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. In addition, at any time prior to April 15, 2024, we may redeem the Senior Notes due 2029, in whole or in part, at a redemption price equal to 100.0% of the principal amount of the Senior Notes due 2029 to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date plus an applicable "make-whole" premium.

The 2021 Indenture contains customary events of default, including, among other things, payment default, failure to comply with covenants or agreements contained in the 2021 Indenture or the Senior Notes due 2029 and certain provisions related to bankruptcy events. The 2021 Indenture also contains customary negative covenants. As of December 31, 2022, we were in compliance with all covenants set forth in the 2021 Indenture and the Senior Notes due 2029.

Other Arrangements

We have posted surety bonds to support regulatory and contractual obligations for certain decommissioning responsibilities, projects and legal matters. We utilize bonding facilities to support such obligations, but the issuance of bonds under those facilities is typically at the surety's discretion, and the bonding facilities generally permit the surety, in its sole discretion, to terminate the facility or demand collateral. Although there can be no assurance that we will maintain our surety bonding capacity, we believe our current capacity is adequate to support our existing requirements for the next 12 months. In addition, these bonds generally indemnify the beneficiaries should we fail to perform our obligations under the applicable agreements. We, and certain of our subsidiaries, have jointly executed general agreements of indemnity in favor of surety underwriters relating to surety bonds those underwriters issue. As of December 31, 2022, bonds issued and outstanding under these arrangements totaled approximately $113.5 million.

Similarly, we have provided letters of credit to governmental agencies and contractual counterparties to support regulatory and contractual obligations for certain decommissioning responsibilities, projects and legal matters. We utilize our Revolving Credit Facility and a bilateral letter of credit facility to support such obligations, but the issuance of letters of credit under our bilateral letter of credit facility is at the issuer's discretion, and our bilateral facility generally permits the issuer, in its sole discretion, to demand collateral if the issuer does not otherwise have the benefit of the collateral under our Credit Facility. Although there can be no assurance that we will maintain our bilateral letter of credit capacity, we believe our current capacity, together with capacity under our Revolving Credit Facility, is adequate to support our existing requirements for the next 12 months. As of December 31, 2022, letters of credit issued and outstanding under our bilateral letter of credit facility totaled approximately $34.9 million, and such letters of credit are secured by the collateral under our Credit Facility.

Segment Reporting

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

Segment Reporting

SEGMENT REPORTINGAs described in Note 1, our operations are assessed based on two reportable segments. The operations of our segments are managed separately, and each segment has unique technology, services and customer classes. We account for intersegment sales at prices that we generally establish by reference to similar transactions with unaffiliated customers. Reportable segments are measured based on operating income exclusive of general corporate expenses and gains (losses) on sales of corporate assets.

1. Information about Operations in our Different Industry Segments:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
REVENUES:
Government Operations	$	1,808,483	$	1,725,097	$	1,763,127
Commercial Operations	427,358		407,082		371,269
Eliminations (1)	(3,007)		(8,105)		(10,880)
	$	2,232,834	$	2,124,074	$	2,123,516

(1)Segment revenues are net of the following intersegment transfers:


Government Operations Transfers	$	(2,941)	$	(7,327)	$	(10,327)
Commercial Operations Transfers	(66)		(778)		(553)
	$	(3,007)	$	(8,105)	$	(10,880)


OPERATING INCOME:
Government Operations	$	336,501	$	329,549	$	345,250
Commercial Operations	27,418		35,243		36,915
	$	363,919	$	364,792	$	382,165
Unallocated Corporate (1)	(15,348)		(18,944)		(23,613)
Total Operating Income (2)	$	348,571	$	345,848	$	358,552
Other Income (Expense)	(34,194)		49,865		3,620
Income before Provision for Income Taxes	$	314,377	$	395,713	$	362,172

(1)Unallocated Corporate includes general corporate overhead not allocated to segments.

(2)The following amounts are included in Operating Income:


Losses (Gains) on Asset Disposals and Impairments, Net:
Government Operations	$	(250)	$	(8)	$	320
Commercial Operations	6,233		(2,548)		(1,681)
Unallocated Corporate	(463)		(976)		—
	$	5,520	$	(3,532)	$	(1,361)
Equity in Income of Investees:
Government Operations	$	45,973	$	33,498	$	27,152
Commercial Operations	—		—		—
	$	45,973	$	33,498	$	27,152


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
CAPITAL EXPENDITURES:
Government Operations	$	103,093	$	147,051	$	137,197
Commercial Operations	88,853		153,571		106,614
Segment Capital Expenditures	191,946		300,622		243,811
Corporate Capital Expenditures	6,366		10,430		11,216
Total Capital Expenditures	$	198,312	$	311,052	$	255,027
DEPRECIATION AND AMORTIZATION:
Government Operations	$	47,982	$	42,485	$	35,398
Commercial Operations	18,805		19,884		18,431
Segment Depreciation and Amortization	66,787		62,369		53,829
Corporate Depreciation and Amortization	7,055		6,711		6,845
Total Depreciation and Amortization	$	73,842	$	69,080	$	60,674


	December 31,
	2022		2021		2020
	(In thousands)
SEGMENT ASSETS:
Government Operations	$	1,498,472	$	1,430,863	$	1,353,122
Commercial Operations	1,005,545		976,382		830,226
Segment Assets	2,504,017		2,407,245		2,183,348
Corporate Assets	114,922		94,135		110,155
Total Assets	$	2,618,939	$	2,501,380	$	2,293,503
INVESTMENT IN UNCONSOLIDATED AFFILIATES:
Government Operations	$	100,198	$	85,284	$	71,806
Commercial Operations	—		—		—
Total Investment in Unconsolidated Affiliates	$	100,198	$	85,284	$	71,806

2. Information about our Product and Service Lines:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
REVENUES:
Government Operations:
Nuclear Components and Fuel	$	1,494,810	$	1,481,416	$	1,512,980
Downblending and Nuclear Services	233,197		198,420		207,221
Advanced Reactor Design and Engineering	80,476		45,261		42,926
	1,808,483		1,725,097		1,763,127
Commercial Operations:
Nuclear Manufacturing	221,458		246,444		250,585
Nuclear Services and Engineering	205,900		160,638		120,684
	427,358		407,082		371,269
Eliminations	(3,007)		(8,105)		(10,880)
	$	2,232,834	$	2,124,074	$	2,123,516

3. Information about our Consolidated Operations in Different Geographic Areas:


	December 31,
	2022		2021		2020
	(In thousands)
NET PROPERTY, PLANT AND EQUIPMENT:
United States	$	743,767	$	698,772	$	603,518
Canada	389,490		346,868		212,953
United Kingdom	1,640		—		—
	$	1,134,897	$	1,045,640	$	816,471

See Note 3 for revenues by geographic area for each of our segments.

4. Information about our Major Customers:

In the years ended December 31, 2022, 2021 and 2020, sales to the U.S. Government accounted for approximately 94%, 95% and 94% of our Government Operations segment revenues, respectively. In the years ended December 31, 2022, 2021 and 2020, sales to large utility customers accounted for approximately 74%, 75% and 73% of our Commercial Operations segment revenues, respectively.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Income Taxes

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Income Taxes

INCOME TAXES

We are subject to federal income tax in the U.S., Canada and the U.K., as well as income tax within multiple U.S. state jurisdictions. We provide for income taxes based on the enacted tax laws and rates in the jurisdictions in which we conduct our operations. These jurisdictions may have regimes of taxation that vary with respect to nominal rates and with respect to the basis on which these rates are applied. This variation, along with the changes in our mix of income within these jurisdictions, can contribute to shifts in our effective tax rate from period to period.

We are not currently under audit by any of the various state authorities, and we do not have any returns under examination for years prior to 2017.

We apply the provisions of FASB Topic Income Taxes regarding the treatment of uncertain tax positions. A reconciliation of unrecognized tax benefits (exclusive of interest and federal and state benefits) is as follows:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Balance at beginning of period	$	—	$	5,852	$	3,899
Increases based on tax positions taken in the current year	—		964		2,075
Increases based on tax positions taken in the prior years	—		—		—
Decreases based on tax positions taken in the prior years	—		—		—
Decreases due to settlements with tax authorities	—		(6,775)		—
Decreases due to lapse of applicable statute of limitation	—		(41)		(123)
Other, net	—		—		1
Balance at end of period	$	—	$	—	$	5,852

Deferred income taxes reflect the net tax effects of temporary differences between the financial and tax bases of assets and liabilities. Significant components of deferred tax assets and liabilities as of December 31, 2022 and 2021 were as follows:


	December 31,
	2022		2021
	(In thousands)
Deferred tax assets:
Pension liability	$	11,931	$	12,047
Accrued warranty expense	1,694		1,363
Capitalized Section 174 expenditures	11,145		—
Accrued vacation pay	3,246		7,633
Accrued liabilities for self-insurance (including postretirement health care benefits)	17		2,095
Accrued liabilities for executive and employee incentive compensation	12,475		10,733
Environmental and products liabilities	20,983		21,050
Lease liabilities	5,298		3,667
Investments in joint ventures and affiliated companies	1,494		2,283
Long-term contracts	14,442		21,562
Accrued payroll taxes	2,504		4,753
U.S. federal tax credits and loss carryforward	7,113		7,023
U.S. state tax credits and loss carryforward	4,731		4,866
Foreign tax credit and loss carryforward	20,209		16,477
Other	2,719		2,568
Gross deferred tax assets	120,001		118,120
Valuation allowance for deferred tax assets	(13,022)		(13,218)
Total deferred tax assets	106,979		104,902
Deferred tax liabilities:
Property, plant and equipment	75,334		66,636
Right-of-use lease assets	12,246		11,666
Intangibles	22,404		16,365
Total deferred tax liabilities	109,984		94,667
Net deferred tax assets (liabilities)	$	(3,005)	$	10,235

The components of Income before Provision for Income Taxes were as follows:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
U.S.	$	281,677	$	343,091	$	314,150
Other than U.S.	32,700		52,622		48,022
Income before Provision for Income Taxes	$	314,377	$	395,713	$	362,172

The components of Provision for Income Taxes were as follows:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Current:
U.S. – federal	$	54,683	$	31,535	$	53,340
U.S. – state and local	5,360		1,030		7,587
Other than U.S.	10,199		16,769		14,159
Total current	70,242		49,334		75,086
Deferred:
U.S. – federal	5,755		40,463		10,852
U.S. – state and local	(34)		3,473		(536)
Other than U.S.	(206)		(3,845)		(2,426)
Total deferred	5,515		40,091		7,890
Provision for Income Taxes	$	75,757	$	89,425	$	82,976

The following is a reconciliation of our income tax provision from the U.S. statutory federal tax rate to our consolidated effective tax rate:


	Year Ended December 31,
	2022		2021		2020
U.S. federal statutory tax rate	21.0	%	21.0	%	21.0	%
State and local income taxes	1.7	%	1.1	%	1.9	%
Foreign rate differential	0.5	%	0.6	%	0.6	%
Excess tax deductions on equity compensation	(0.1)	%	(0.1)	%	(0.3)	%
Other	1.0	%	—	%	(0.3)	%
Effective tax rate	24.1	%	22.6	%	22.9	%

At December 31, 2022, we had a valuation allowance of $13.0 million for deferred tax assets, which we expect cannot be realized through carrybacks, future reversals of existing taxable temporary differences and our estimate of future taxable income. We believe that our remaining deferred tax assets are more likely than not realizable through carrybacks, future reversals of existing taxable temporary differences, our estimate of future taxable income and potential tax planning. Any changes to our estimated valuation allowance could be material to our consolidated financial statements.

The following is an analysis of our valuation allowance for deferred tax assets:


	Beginning Balance		Charges To Costs and Expenses	Charged To Other Accounts	Ending Balance
	(In thousands)
Year Ended December 31, 2022	$	(13,218)	196	—	$	(13,022)
Year Ended December 31, 2021	$	(12,892)	(326)	—	$	(13,218)
Year Ended December 31, 2020	$	(13,578)	771	(85)	$	(12,892)

We have domestic federal and foreign capital losses of $9.4 million available to offset future capital gains. The domestic federal capital losses begin to expire in 2023, while the foreign capital losses have an indefinite carryforward period. We are carrying a full valuation allowance of $9.4 million against the deferred tax asset related to these domestic federal and foreign capital loss carryforwards.

In addition, we have state credits and state net operating losses of $5.9 million ($4.7 million net of federal tax benefit) available to offset future taxable income in various states. These state net operating loss carryforwards begin to expire in 2023. We are carrying a valuation allowance of $4.6 million ($3.6 million net of federal tax benefit) against the deferred tax asset related to the state credits and state loss carryforwards.

We would be subject to withholding taxes if we were to distribute earnings from certain foreign subsidiaries. As of December 31, 2022, the undistributed earnings of these subsidiaries were approximately $277.2 million, and our unrecognized deferred income tax liabilities of approximately $13.9 million would be payable upon the distribution of these earnings. All of our foreign earnings are considered indefinitely reinvested.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 14
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 270
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI https://asc.fasb.org/topic&trid=2144680

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Stock-Based Compensation - Schedule of Changes in Nonvested Stock Awards (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Weighted- Average Grant Date Fair Value
Vested, weighted-average grant date fair value (USD per share) \| $ / shares	$ 51.80
BWXT Performance Shares
Number of Shares
Nonvested at beginning of period (in shares) \| shares	545
Adjustment to assumed vesting percentage (in shares) \| shares	18
Granted (in shares) \| shares	202
Vested (in shares) \| shares	(176)
Cancelled/forfeited (in shares) \| shares	(79)
Nonvested at end of period (in shares) \| shares	510
Weighted- Average Grant Date Fair Value
Nonvested at beginning of period, weighted-average grant date fair value (USD per share) \| $ / shares	$ 55.90
Adjustment to assumed vesting percentage, weighted-average grant date fair value (USD per share) \| $ / shares	47.90
Granted, weighted-average grant date fair value (USD per share) \| $ / shares	45.62
Cancelled/forfeited, weighted-average grant date fair value (USD per share) \| $ / shares	53.79
Nonvested at end of period, weighted-average grant date fair value (USD per share) \| $ / shares	$ 53.01
BWXT Restricted Stock Units
Number of Shares
Nonvested at beginning of period (in shares) \| shares	221
Granted (in shares) \| shares	191
Vested (in shares) \| shares	(124)
Cancelled/forfeited (in shares) \| shares	(46)
Nonvested at end of period (in shares) \| shares	242
Weighted- Average Grant Date Fair Value
Nonvested at beginning of period, weighted-average grant date fair value (USD per share) \| $ / shares	$ 57.66
Granted, weighted-average grant date fair value (USD per share) \| $ / shares	46.33
Vested, weighted-average grant date fair value (USD per share) \| $ / shares	55.49
Cancelled/forfeited, weighted-average grant date fair value (USD per share) \| $ / shares	52.59
Nonvested at end of period, weighted-average grant date fair value (USD per share) \| $ / shares	$ 50.79

Investments - Summary of Available for Sale Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Total
Total, amortized cost	$ 11,735	$ 11,409
Total, gross unrealized gains	246	2,023
Total, gross unrealized losses	(80)	(63)
Total, estimated fair value	11,901	13,369
Mutual funds
Equity securities
Equity securities, amortized cost	6,352	6,001
Equity securities, gross unrealized gains	0	1,649
Equity securities, gross unrealized losses	(11)	0
Equity securities, estimated fair value	6,341	7,650
U.S. Government and agency securities
Available-for-sale securities
Available-for-sale securities, amortized cost	3,247	2,742
Available-for-sale securities, gross unrealized gains	10	0
Available-for-sale securities, gross unrealized losses	(4)	(4)
Available-for-sale securities, estimated fair value	3,253	2,738
Corporate bonds
Available-for-sale securities
Available-for-sale securities, amortized cost	2,033	2,559
Available-for-sale securities, gross unrealized gains	236	374
Available-for-sale securities, gross unrealized losses	(4)	(7)
Available-for-sale securities, estimated fair value	2,265	2,926
Asset-backed securities and collateralized mortgage obligations
Available-for-sale securities
Available-for-sale securities, amortized cost	103	107
Available-for-sale securities, gross unrealized gains	0	0
Available-for-sale securities, gross unrealized losses	(61)	(52)
Available-for-sale securities, estimated fair value	$ 42	$ 55

Basis of Presentation and Significant Accounting Policies

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

We have presented the consolidated financial statements of BWX Technologies, Inc. ("BWXT") in U.S. dollars in accordance with accounting principles generally accepted in the United States ("GAAP").

We use the equity method to account for investments in entities that we do not control, but over which we have the ability to exercise significant influence. We generally refer to these entities as "joint ventures." We have eliminated all intercompany transactions and accounts. We classify assets and liabilities related to long-term contracts as current using the duration of the related contract or program as our operating cycle, which is generally longer than one year. We have reclassified certain amounts previously reported to conform to the presentation at December 31, 2022 and for the year ended December 31, 2022. We present the notes to our consolidated financial statements on the basis of continuing operations, unless otherwise stated.

Unless the context otherwise indicates, "we," "us" and "our" mean BWXT and its consolidated subsidiaries.

Reportable Segments

We operate in two reportable segments: Government Operations and Commercial Operations. Our reportable segments reflect changes we made during the first quarter of 2022 to better align our businesses by their government and commercial nature, which reflects the manner in which our operating segment information is reported for purposes of assessing operating performance and allocating resources. Prior to 2022, we reported three segments: Nuclear Operations Group, Nuclear Power Group and Nuclear Services Group.

Our Government Operations segment consists of our legacy Nuclear Operations Group and Nuclear Services Group segments with certain research and development activities in the areas of advanced reactors and advanced manufacturing. Our Commercial Operations segment consists of our legacy Nuclear Power Group segment with certain research and development and commercialization activities in the areas of medical and industrial radioisotopes and radiopharmaceuticals. Both segments now include research and development and certain commercialization activities associated with new technologies previously reported outside of our reportable segments. The change in our reportable segments had no impact on our previously reported consolidated results of operations, financial condition or cash flows. We have applied the change in reportable segments to previously reported historical financial information and related disclosures included in this annual report on Form 10-K. Our reportable segments are further described as follows:

•Our Government Operations segment manufactures naval nuclear reactors, including the related nuclear fuel, for the U.S. Naval Nuclear Propulsion Program for use in submarines and aircraft carriers. Through this segment, we also fabricate fuel-bearing precision components that range in weight from a few grams to hundreds of tons, manufacture electro-mechanical equipment, perform design, manufacturing, inspection, assembly and testing activities and downblend Cold War-era government stockpiles of high-enriched uranium. In addition, we supply proprietary and sole-source valves, manifolds and fittings to global naval and commercial shipping customers. In-house capabilities also include wet chemistry uranium processing, advanced heat treatment to optimize component material properties and a controlled, clean-room environment with the capacity to assemble railcar-size components. This segment also provides various other services, primarily through joint ventures, to the U.S. Government including nuclear materials management and operation, environmental management and administrative and operating services for various U.S. Government-owned facilities. These services are provided to the U.S. Department of Energy ("DOE"), including the National Nuclear Security Administration, the Office of Nuclear Energy, the Office of Science and the Office of Environmental Management, the Department of Defense and NASA. In addition, this segment also develops technology for advanced nuclear reactors for a variety of power and propulsion applications in the space and terrestrial domains and offers complete advanced nuclear fuel and reactor design and engineering, licensing and manufacturing services for these programs.

•Our Commercial Operations segment fabricates commercial nuclear steam generators, nuclear fuel, fuel handling systems, pressure vessels, reactor components, heat exchangers, tooling delivery systems and other auxiliary equipment, including containers for the storage of spent nuclear fuel and other high-level waste and supplies nuclear-grade materials and precisely machined components for nuclear utility customers. We have supplied the nuclear industry with more than 1,300 large, heavy components worldwide, and we are the only commercial heavy nuclear component manufacturer in North America. This segment also provides specialized engineering services that include structural component design, 3-D thermal-hydraulic engineering analysis, weld and robotic process development,

electrical and controls engineering and metallurgy and materials engineering. In addition, this segment offers in-plant inspection, maintenance and modification services for nuclear steam generators, heat exchangers, reactors, fuel handling systems and balance of plant equipment, as well as specialized non-destructive examination and tooling/repair solutions. This segment also manufactures medical radioisotopes, radiopharmaceuticals and medical devices, and partners with life science and pharmaceutical companies developing new drugs.

See Note 15 and Note 3 for financial information about our segments.

Recently Adopted Accounting Standards

There were no accounting standards adopted during the year ended December 31, 2022 that had a significant impact on our financial position, results of operations, cash flows or disclosures.

Use of Estimates

We use estimates and assumptions to prepare our financial statements in conformity with GAAP. Some of our more significant estimates include estimates of costs to complete long-term contracts and the associated revenues, estimates of the fair value of acquired intangible and other assets, estimates we make in selecting assumptions related to the valuations of our pension and postretirement benefit plans, including the selection of our discount rates, mortality and expected rates of return on our pension plan assets and estimates we make in evaluating our asset retirement obligations. These estimates and assumptions affect the amounts we report in our financial statements and accompanying notes. Our actual results could differ from these estimates. Variances could result in a material effect on our financial condition and results of operations in future periods.

Contracts and Revenue Recognition

We generally recognize contract revenues and related costs over time for individual performance obligations based on a cost-to-cost method in accordance with FASB Topic Revenue from Contracts with Customers. We recognize estimated contract revenue and resulting income based on the measurement of the extent of progress toward completion as a percentage of the total project. Certain costs may be excluded from the cost-to-cost method of measuring progress, such as significant costs for uninstalled materials, if such costs do not depict our performance in transferring control of goods or services to the customer. We review contract price and cost estimates periodically as the work progresses and reflect adjustments proportionate to the percentage-of-completion in income in the period when those estimates are revised. Certain of our contracts recognize revenue at a point in time, and revenue on these contracts is recognized when control transfers to the customer. The majority of our revenue that is recognized at a point in time is related to parts and certain medical radioisotopes and radiopharmaceuticals in our Commercial Operations segment. For all contracts, if a current estimate of total contract cost indicates a loss on a contract, the projected loss is recognized in full when determined.

See Note 3 for a further discussion of revenue recognition.

Stock-Based Compensation

We expense stock-based compensation in accordance with FASB Topic Compensation – Stock Compensation. Under this topic, the fair value of equity-classified awards, such as restricted stock, performance shares and stock options, is determined on the date of grant and is not remeasured. The fair value of liability-classified awards, such as cash-settled stock appreciation rights, restricted stock units and performance units, is determined on the date of grant and is remeasured at the end of each reporting period through the date of settlement. Grant date fair values for restricted stock, restricted stock units, performance shares and performance units are determined using the closing price of our common stock on the date of grant.

Under the provisions of this FASB topic, we recognize expense for all share-based awards granted on a straight-line basis over the requisite service periods of the awards, which is generally equivalent to the vesting term. This topic requires compensation expense to be recognized such that compensation expense is recorded only for those awards expected to vest. As a result, we periodically review the amount of actual forfeitures and record any adjustments deemed necessary each reporting period. We also recognize excess tax benefits in our provision for income taxes. These excess tax benefits result from tax deductions in excess of the cumulative compensation expense recognized for options exercised and other equity-classified awards.

See Note 9 for a further discussion of stock-based compensation.

Grant Accounting

We recognize amounts related to grants as a reduction of expense in the period in which the related costs for which the grants are intended to compensate are recognized and we are reasonably assured to receive payment.

On April 11, 2020, the Canadian Government enacted the Canada Emergency Wage Subsidy ("CEWS") under the COVID-19 Economic Response Plan to prevent large layoffs and help employers offset a portion of their employee salaries and wages for a limited period. During the years ended December 31, 2022, 2021 and 2020, we recognized subsidies under the CEWS as offsets to operating expenses of $0.6 million, $5.4 million and $20.4 million, respectively.

Research and Development

Our research and development activities are related to the development and improvement of new and existing products and equipment, as well as conceptual and engineering evaluation for translation into practical applications. Research and development costs are expensed as incurred, unless these costs relate to customer-sponsored activities where we are reimbursed in accordance with the terms of the underlying contracts. Amounts expensed as incurred for company-funded research and development projects are included in Research and development costs. Costs related to contracts with customers for customer-sponsored research and development projects are included as a contract cost in Cost of operations whereby we recognize revenue, consistent with our revenue recognition policies. Additionally, we may enter into cost-sharing arrangements with our customers to enhance our internal development capabilities and offset a portion of the costs incurred related to these development efforts.

Research and development activities totaled $45.4 million, $31.4 million and $40.8 million in the years ended December 31, 2022, 2021 and 2020, respectively. This includes amounts paid for by our customers of $35.9 million, $20.3 million and $26.6 million in the years ended December 31, 2022, 2021 and 2020, respectively.

Capitalization of Interest Cost

We capitalize interest in accordance with FASB Topic Interest. We incurred total interest of $53.9 million, $51.1 million and $40.8 million in the years ended December 31, 2022, 2021 and 2020, respectively, of which we capitalized $17.5 million, $15.3 million and $9.8 million in the years ended December 31, 2022, 2021 and 2020, respectively.

Income Taxes

Income tax expense for federal, foreign, state and local income taxes is calculated on pre-tax income based on current tax law and includes the cumulative effect of any changes in tax rates from those used previously in determining deferred tax assets and liabilities. We record a valuation allowance to reduce our deferred tax assets to the amount that is more likely than not to be realized. We assess deferred taxes and the adequacy of the valuation allowance on a quarterly basis. In the ordinary course of business, there is inherent uncertainty in quantifying our income tax positions. We assess our income tax positions and record tax benefits for all years subject to examination based upon management's evaluation of the facts, circumstances and information available at the reporting date. For those tax positions where it is more likely than not that a tax benefit will be sustained, we have recorded the largest amount of tax benefit with a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is not more likely than not that a tax benefit will be sustained, no tax benefit has been recognized in the financial statements. We record interest and penalties (net of any applicable tax benefit) related to income taxes as a component of Provision for Income Taxes on our consolidated statements of income.

We would be subject to withholding taxes if we were to distribute earnings from certain foreign subsidiaries, and unrecognized deferred income tax liabilities, including withholding taxes, would be payable upon distribution of these earnings. We consider the earnings of our non-U.S. subsidiaries to be permanently reinvested.

Earnings Per Share

We have computed earnings per common share on the basis of the weighted-average number of common shares, and, where dilutive, common share equivalents, outstanding during the indicated periods. We issue a number of forms of stock-based compensation periodically, including incentive and non-qualified stock options, restricted stock, restricted stock units, performance shares and performance units, subject to satisfaction of specific performance goals. We include the shares applicable to these plans in our computation of diluted earnings per share when related performance criteria have been met.

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents

Our cash equivalents are highly liquid investments with maturities of three months or less when we purchase them.

We record cash and cash equivalents as restricted when we are unable to freely use such cash and cash equivalents for our general operating purposes. At December 31, 2022, we had restricted cash and cash equivalents totaling $5.7 million, $2.8 million of which was held for future decommissioning of facilities (which is included in Other Assets on our consolidated balance sheets) and $2.9 million of which was held to meet reinsurance reserve requirements of our captive insurer.

The following table provides a reconciliation of cash and cash equivalents and restricted cash and cash equivalents on our consolidated balance sheets to the totals presented on our consolidated statements of cash flows:


	December 31,
	2022		2021
	(In thousands)
Cash and cash equivalents	$	35,244	$	33,891
Restricted cash and cash equivalents	2,928		2,896
Restricted cash and cash equivalents included in Other Assets	2,818		2,988
Total cash and cash equivalents and restricted cash and cash equivalents as presented on our consolidated statements of cash flows	$	40,990	$	39,775

Investments

Our investment portfolio consists primarily of U.S. Government securities, corporate bonds and mutual funds. Our debt securities are carried at fair value and are either classified as trading, with unrealized gains and losses reported in earnings, or as available-for-sale, with the unrealized gains and losses, net of tax, reported as a component of Accumulated other comprehensive income. Our equity securities are carried at fair value with the unrealized gains and losses reported in earnings. We classify investments available for current operations in the consolidated balance sheets as current assets, while we classify investments held for long-term purposes as noncurrent assets. We adjust the amortized cost of debt securities for amortization of premiums and accretion of discounts to maturity, and such adjustments are included in Interest income. We include realized gains and losses on our investments in Other – net. The cost of securities sold is based on the specific identification method. We include interest on investments in Interest income.

Inventories

We carry our inventory at the lower of cost or net realizable value using either the weighted-average or first-in, first-out methods. At December 31, 2022 and 2021, Other current assets included inventories totaling $22.9 million and $16.3 million, respectively, consisting entirely of raw materials and supplies.

Property, Plant and Equipment

We carry our property, plant and equipment at depreciated cost, less any impairment provisions. We depreciate our property, plant and equipment using the straight-line method over estimated economic useful lives of eight to 40 years for buildings and three to 14 years for machinery and equipment. Our depreciation expense was $61.3 million, $58.1 million and $50.3 million for the years ended December 31, 2022, 2021 and 2020, respectively. We expense the costs of maintenance, repairs and renewals that do not materially prolong the useful life of an asset as we incur them.

Property, plant and equipment is stated at cost and is set forth below:


	December 31,
	2022		2021
	(In thousands)
Land	$	9,844	$	9,538
Buildings	365,955		321,872
Machinery and equipment	1,026,024		957,423
Property under construction	515,494		487,856
	1,917,317		1,776,689
Less: Accumulated depreciation	782,420		731,049
Property, Plant and Equipment, Net	$	1,134,897	$	1,045,640

Goodwill

Goodwill represents the excess of the cost of our acquired businesses over the fair value of the net assets acquired. We perform testing of goodwill for impairment annually or more frequently whenever events or circumstances indicate the carrying value of goodwill may be impaired. We may elect to perform a qualitative test when we believe that there is sufficient excess fair value over carrying value based on our most recent quantitative assessment, adjusted for relevant events and circumstances that could affect fair value during the current year. If we conclude based on this assessment that it is more likely than not that the reporting unit is not impaired, we do not perform a quantitative impairment test. In all other circumstances, we compare the fair value of a reporting unit to its carrying amount, including goodwill. If the fair value of the reporting unit exceeds its carrying value, no impairment charge is recorded. If the carrying amount of a reporting unit exceeds its fair value, an impairment charge is recorded to goodwill in the amount by which carrying value exceeds fair value.

The following summarizes the changes in the carrying amount of Goodwill:


	Government Operations		Commercial Operations		Total
	(In thousands)
Balance at December 31, 2020	$	155,939	$	127,769	$	283,708

Translation	—		1,794		1,794
Balance at December 31, 2021	$	155,939	$	129,563	$	285,502
Acquisitions (Note 2)	16,609		—		16,609
Translation	(461)		(8,485)		(8,946)
Balance at December 31, 2022	$	172,087	$	121,078	$	293,165

Investments in Unconsolidated Affiliates

We use the equity method of accounting for affiliates in which we are able to exert significant influence. Currently, all of our material investments in affiliates that are not consolidated are recorded using the equity method. Affiliates in which we are unable to exert significant influence are carried at fair value.

Intangible Assets

Intangible assets are recognized at fair value when acquired. Intangible assets with definite lives are amortized to Costs and Expenses using the straight-line method over their estimated useful lives and tested for impairment when events or changes in circumstances indicate that their carrying amounts may not be recoverable. Intangible assets with indefinite lives are not amortized and are subject to annual impairment testing. We may elect to perform a qualitative assessment when testing indefinite-lived intangible assets for impairment to determine whether events or circumstances affecting significant inputs related to the most recent quantitative evaluation have occurred, indicating that it is more likely than not that the indefinite-lived intangible asset is impaired. Otherwise, we test indefinite-lived intangible assets for impairment by quantitatively determining the fair value of the indefinite-lived intangible asset and comparing the fair value of the intangible asset to its carrying amount. If the carrying amount of the intangible asset exceeds its fair value, we recognize impairment for the amount of the difference.

Our Intangible Assets were as follows:


	December 31,
	2022		2021		2020
	(In thousands)
Amortized intangible assets:
Gross cost:
Technical support agreement	$	65,069	$	69,781	$	68,785
Customer relationships	56,176		40,247		39,954
Unpatented technology	39,609		38,073		37,529
CNSC class 1B nuclear facility license	25,094		26,911		26,528
Acquired backlog	13,537		7,595		7,487
Patented technology	738		792		780

All other	812		871		858
Total	$	201,035	$	184,270	$	181,921
Accumulated amortization:
Technical support agreement	$	(12,495)	$	(10,366)	$	(7,227)
Customer relationships	(20,590)		(18,176)		(15,996)
Unpatented technology	(7,966)		(6,398)		(4,584)
CNSC class 1B nuclear facility license	(5,052)		(4,521)		(3,573)
Acquired backlog	(4,474)		(2,531)		(1,248)
Patented technology	(405)		(363)		(286)

All other	(271)		(194)		(86)
Total	$	(51,253)	$	(42,549)	$	(33,000)
Net amortized intangible assets	$	149,782	$	141,721	$	148,921
Unamortized intangible assets:
NRC category 1 license	$	43,830	$	43,830	$	43,830

The following summarizes the changes in the carrying amount of Intangible Assets:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Balance at beginning of period	$	185,551	$	192,751	$	191,392
Acquisitions (Note 2)	28,500		—		8,180
Amortization expense	(10,901)		(9,329)		(8,824)
Translation and other (1)	(9,538)		2,129		2,003
Balance at end of period	$	193,612	$	185,551	$	192,751

(1)Includes $(0.6) million related to the divestiture of the U.S.-based commercial nuclear services business during the year ended December 31, 2020.

Estimated amortization expense for the next five fiscal years is as follows (amounts in thousands):


Year Ended December 31,	Amount
2023	$	11,328
2024	$	11,328
2025	$	11,328
2026	$	10,147
2027	$	8,552

Leases

We lease certain manufacturing facilities, office space and equipment under operating leases with terms of one to 20 years. Certain of the leases include options to renew for periods of one to 10 years. We include lease options in our determination of the right-of-use asset and lease liability if it is reasonably certain that we will exercise one or more of the options. Leases with initial terms of 12 months or less are excluded from our right-of-use assets and lease liabilities. Our right-of-use assets are included in Other Assets on our consolidated balance sheets. Our current lease liabilities are included in Accrued liabilities – other, and our noncurrent lease liabilities are included in Other Liabilities on our consolidated balance sheets. We use discount rates based on our incremental borrowing rate as most of our leases do not provide an implicit rate that can be readily determined.

During the year ended December 31, 2022, we recognized lease expense of $8.6 million, which included $1.6 million related to the amortization of favorable lease agreements, and paid cash of $6.6 million for our operating leases. During the years ended December 31, 2021 and 2020, we recognized lease expense of $8.4 million and $7.7 million, respectively. At December 31, 2022, our weighted-average remaining lease term was 13.9 years, and for the purpose of measuring the present value of our lease liabilities, the weighted-average discount rate was 4.72%. The maturities of our lease liabilities at December 31, 2022 were as follows (amounts in thousands):


2023	$	4,546
2024	3,647
2025	3,026
2026	2,426
2027	1,609
Thereafter	15,824
Total lease payments	$	31,078
Less: Interest	(8,673)
Present value of lease liabilities (1)	$	22,405

(1)Includes current lease liabilities of $4.4 million.

At December 31, 2022, our right-of-use assets totaled $49.6 million. The difference between our right-of-use assets and lease liabilities primarily resulted from favorable lease agreements related to acquisitions.

Warranty Expense

We accrue estimated warranty expense, included in Cost of operations on our consolidated statements of income, to satisfy contractual warranty requirements when we recognize the associated revenue on the related contracts. In addition, we record specific provisions or reductions where we expect the actual warranty costs to significantly differ from the accrued estimates. Such changes could have a material effect on our consolidated financial condition, results of operations and cash flows. Included in Accrued liabilities – other on our consolidated balance sheets were accrued warranty expenses totaling $6.6 million and $5.3 million at December 31, 2022 and 2021, respectively.

Deferred Debt Issuance Costs

We have included deferred debt issuance costs in the consolidated balance sheets as a direct deduction from the carrying amount of our debt liability. We amortize deferred debt issuance costs as interest expense over the life of the related debt. The following summarizes the changes in the carrying amount of these assets:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Balance at beginning of period	$	10,696	$	12,269	$	8,006
Additions	2,405		4,838		6,803
Interest expense (1)	(1,975)		(6,411)		(2,540)
Balance at end of period	$	11,126	$	10,696	$	12,269

(1)Includes the recognition of prior deferred debt issuance costs associated with former debt instruments of $(4.2) million and $(0.7) million for the years ended December 31, 2021 and 2020, respectively.

Pension Plans and Postretirement Benefits

We sponsor various defined benefit pension and postretirement benefit plans covering certain employees of our U.S. and Canadian subsidiaries. We utilize actuarial valuations to calculate the cost and benefit obligations of our pension and postretirement benefits. The actuarial valuations utilize significant assumptions in the determination of our benefit cost and obligations, including assumptions regarding discount rates, expected returns on plan assets, mortality and health care cost trends. We determine our discount rate based on a yield curve comprising rates of return on high-quality, fixed-income investments currently available and expected to be available during the period to maturity of our pension and postretirement benefit plan obligations. The expected rate of return on plan assets assumption is based on capital market assumptions of the long-term expected returns for the investment mix of assets currently in the portfolio. The expected rate of return on plan assets is determined to be the weighted-average of the nominal returns based on the weightings of the classes within the total asset portfolio. Expected health care cost trends represent expected annual rates of change in the cost of health care benefits and are estimated based on analysis of health care cost inflation.

The components of benefit cost related to service cost, interest cost, expected return on plan assets and prior service cost amortization are recorded on a quarterly basis based on actuarial assumptions. In the fourth quarter of each year, or as interim remeasurements are required, we immediately recognize net actuarial gains and losses in earnings as a component of net periodic benefit cost. Recognized net actuarial gains and losses consist primarily of our reported actuarial gains and losses and the difference between the actual return on plan assets and the expected return on plan assets.

We recognize the funded status of each plan as either an asset or a liability in the consolidated balance sheets. The funded status is the difference between the fair value of plan assets and the present value of its benefit obligation, determined on a plan-by-plan basis. Our pension plan assets can include assets that are difficult to value. See Note 7 for detailed information regarding our plan assets.

Asset Retirement Obligations and Environmental Cleanup Costs

We accrue for future decommissioning of our nuclear facilities that will permit the release of these facilities to unrestricted use at the end of each facility's service life, which is a requirement of our licenses from the U.S. Nuclear Regulatory Commission ("NRC") and the Canadian Nuclear Safety Commission ("CNSC"). In accordance with the FASB Topic Asset Retirement and Environmental Obligations, we record the fair value of a liability for an asset retirement obligation in the period in which it is incurred. When we initially record such a liability, we capitalize a cost by increasing the carrying amount of the related long-lived asset. When we acquire a business that has an asset retirement obligation, the asset retirement obligation is recognized at fair value without a corresponding increase to the related long-lived asset. Over time, the liability is accreted to its present value each period and the capitalized cost is depreciated over the useful life of the related asset. Upon settlement of a liability, we will settle the obligation for its recorded amount or incur a gain or loss. This topic applies to environmental liabilities associated with assets that we currently operate and are obligated to remove from service. For environmental liabilities associated with assets that we no longer operate, we have accrued amounts based on the estimated costs of cleanup activities for which we are responsible, net of any cost-sharing arrangements. We adjust the estimated costs as further information develops or circumstances change. Given the long-lived nature of these facilities, we are required to estimate retirement costs that will be incurred in the future, which may extend up to 40 years at the time the asset retirement obligation is established. Due to the significance of the remaining useful life of these facilities, the timing of retirement and future costs for material components of the asset retirement obligations, such as labor and waste disposal fees, could differ from our estimates. An exception to this accounting treatment relates to the work we perform for two facilities for which the U.S. Government is obligated to pay substantially all of the decommissioning costs.

Substantially all of our asset retirement obligations relate to the remediation of our nuclear analytical laboratory at our facility in Lynchburg, Virginia and the Nuclear Fuel Services, Inc. ("NFS") facility in our Government Operations segment as well as certain facilities in our Commercial Operations segment. The following summarizes the changes in the carrying amount of these liabilities:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Balance at beginning of period	$	84,132	$	78,110	$	77,288
Costs incurred	(1,223)		(215)		(1,608)
Additions/adjustments	(4,289)		—		(3,284)
Accretion	5,158		5,996		5,343
Translation	(1,266)		241		371
Balance at end of period (1)	$	82,512	$	84,132	$	78,110

(1)Includes current asset retirement obligations of $4.7 million, $4.7 million and $2.8 million at December 31, 2022, 2021 and 2020, respectively.

Self-Insurance

We have a wholly owned insurance subsidiary that provides employer's liability, general and automotive liability and primary workers' compensation insurance and, from time to time, builder's risk insurance (within certain limits) to our companies. We may also, in the future, have this insurance subsidiary accept other risks that we cannot or do not wish to transfer to outside insurance companies. Included in Other Liabilities on our consolidated balance sheets were reserves for self-insurance totaling $4.2 million and $4.5 million at December 31, 2022 and 2021, respectively.

Loss Contingencies

We accrue liabilities for loss contingencies when it is probable that a liability has been incurred and the amount of loss is reasonably estimable. We provide disclosure when there is a reasonable possibility that the ultimate loss will exceed the recorded provision or if such probable loss is not reasonably estimable. Due to the nature of our business, we are, from time to time, involved in investigations, litigation, disputes or claims related to our business activities, as discussed in Note 10. Our losses are typically resolved over long periods of time and are often difficult to assess and estimate due to, among other reasons, the possibility of multiple actions by third parties; the attribution of damages, if any, among multiple defendants; plaintiffs, in most cases involving personal injury claims, do not specify the amount of damages claimed; the discovery process may take multiple years to complete; during the litigation process, it is common to have multiple complex unresolved procedural and substantive issues; the potential availability of insurance and indemnity coverages; the wide-ranging outcomes reached in similar cases, including the variety of damages awarded; the likelihood of settlements for de minimis amounts prior to trial; the likelihood of success at trial; and the likelihood of success on appeal. Consequently, it is possible future earnings could be affected by changes in our assessments of the probability that a loss has been incurred in a material pending litigation against us and/or changes in our estimates related to such matters.

Accumulated Other Comprehensive Income

The components of Accumulated other comprehensive income included in Stockholders' Equity are as follows:


	December 31,
	2022		2021
	(In thousands)
Currency translation adjustments	$	(4,207)	$	30,627
Net unrealized gain (loss) on derivative financial instruments	105		(694)
Unrecognized prior service cost on benefit obligations	(17,955)		(18,022)
Net unrealized gain on available-for-sale investments	127		232
Accumulated other comprehensive income	$	(21,930)	$	12,143

The amounts reclassified out of Accumulated other comprehensive income by component and the affected consolidated statements of income line items are as follows:


	Year Ended December 31,
	2022		2021		2020
Accumulated Other Comprehensive Income (Loss) Component Recognized	(In thousands)						Line Item Presented
Realized (loss) gain on derivative financial instruments	$	(370)	$	307	$	(35)	Revenues
	(343)		(712)		695		Cost of operations
	(713)		(405)		660		Total before tax
	181		103		(173)		Provision for Income Taxes
	$	(532)	$	(302)	$	487	Net Income
Amortization of prior service cost on benefit obligations	$	(3,283)	$	(2,919)	$	(3,177)	Other – net
	657		624		645		Provision for Income Taxes
	$	(2,626)	$	(2,295)	$	(2,532)	Net Income
Total reclassification for the period	$	(3,158)	$	(2,597)	$	(2,045)

Foreign Currency Translation

We translate assets and liabilities of our foreign operations into U.S. dollars at current exchange rates, and we translate income statement items at average exchange rates for the periods presented. We record adjustments resulting from the translation of foreign currency financial statements as a component of Accumulated other comprehensive income. We report foreign currency transaction gains and losses in income. We have included in Other – net translation gains (losses) of $(1.4) million, $1.8 million and $(0.6) million for the years ended December 31, 2022, 2021 and 2020, respectively.

Derivative Financial Instruments

Our operations give rise to exposure to market risks from changes in foreign currency exchange ("FX") rates. We use derivative financial instruments, primarily FX forward contracts, to reduce the impact of changes in FX rates on our operating results. We use these instruments to hedge our exposure associated with revenues or costs on our long-term contracts and other transactions that are denominated in currencies other than our operating entities' functional currencies. We do not hold or issue derivative financial instruments for trading or other speculative purposes.

We enter into derivative financial instruments primarily as hedges of certain firm purchase and sale commitments and loans between subsidiaries denominated in foreign currencies. We record these contracts at fair value on our consolidated balance sheets. Based on the hedge designation at inception of the contract, the related gains and losses on these contracts are deferred in stockholders' equity as a component of Accumulated other comprehensive income until the hedged item is recognized in earnings. The gain or loss on a derivative instrument not designated as a hedging instrument is immediately recognized in earnings. Gains and losses on derivative financial instruments that require immediate recognition are included as a component of Other – net on our consolidated statements of income and are recorded in the statements of cash flows based on the nature and use of the instruments.

We have designated the majority of our FX forward contracts that qualify for hedge accounting as cash flow hedges. The hedged risk is the risk of changes in functional-currency-equivalent cash flows attributable to changes in FX spot rates of forecasted transactions primarily related to long-term contracts. We exclude from our assessment of effectiveness the portion of the fair value of the FX forward contracts attributable to the difference between FX spot rates and FX forward rates. At December 31, 2022, we had deferred approximately $0.1 million of net gains on these derivative financial instruments. Assuming market conditions continue, we expect to recognize the majority of this amount in the next 12 months. For the years ended December 31, 2022, 2021 and 2020, we recognized (gains) losses of $(27.1) million, $(0.1) million and $8.7 million, respectively, in Other – net on our consolidated statements of income associated with FX forward contracts not designated as hedging instruments.

At December 31, 2022, our derivative financial instruments consisted of FX forward contracts with a total notional value of $438.8 million with maturities extending to December 2024. These instruments consisted primarily of FX forward contracts to purchase or sell Canadian dollars and Euros. We are exposed to credit-related losses in the event of non-performance by counterparties to derivative financial instruments. We attempt to mitigate this risk by using major financial institutions with

high credit ratings. Our counterparties to derivative financial instruments have the benefit of the same collateral arrangements and covenants as described under our Credit Facility.

New Accounting Standards

In October 2021, the FASB issued an update to the Topic Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. This update requires entities to recognize and measure contract assets and liabilities acquired in a business combination in accordance with FASB Topic Revenue from Contracts with Customers. The update will generally result in an entity recognizing contract assets and liabilities at amounts consistent with those recorded by the acquiree immediately before the acquisition date rather than at fair value. The new standard is effective on a prospective basis for fiscal years beginning after December 15, 2022, with early adoption permitted. We are currently evaluating the impact, if any, of the adoption of this standard on our financial statements.

Equity Method Investments - Reconciliation of Net Income to Equity in Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity Method Investments and Joint Ventures [Abstract]
Equity income based on stated ownership percentages	$ 46,784				$ 31,870				$ 46,784	$ 31,870	$ 27,266
GAAP and other adjustments	(811)				1,628				(811)	1,628	(114)
Equity in income of investees	$ 11,092	$ 14,783	$ 11,319	$ 8,779	$ 7,301	$ 10,618	$ 7,263	$ 8,316	$ 45,973	$ 33,498	$ 27,152

Commitments and Contingencies - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) facility	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Contingencies And Commitments [Line Items]
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Environmental Liabilities	Environmental Liabilities
Environmental Loss Contingency, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities – other	Accrued liabilities – other
Environmental Remediation Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other – net	Other – net
Environmental Matters
Contingencies And Commitments [Line Items]
Pretax charge to comply U.S. federal, state and local environmental control and protection regulations	$ 20.0	$ 17.5	$ 16.3
Capital expenditure to comply environmental regulations	1.6	3.1	$ 1.2
Environmental reserves	101.8	102.4
Environmental reserves included in current liabilities	$ 10.8	9.8
Government Operations \| Environmental Matters
Contingencies And Commitments [Line Items]
Number of facilities \| facility	2
Financial assurance to pay expected cost of decommissioning	$ 68.1	61.8
Commercial Operations \| Environmental Matters
Contingencies And Commitments [Line Items]
Financial assurance to pay expected cost of decommissioning	$ 43.3	$ 46.4

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		12 Months Ended
	May 31, 2020	Jun. 30, 2012	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2014	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense			$ 14.6	$ 18.3	$ 16.8
Stock-based compensation, tax benefits			$ 2.3	3.0	2.7
Performance period			3 years
BWXT Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of stock options exercised			$ 1.2	$ 2.7	$ 4.7
Tax benefits realized related to the stock options exercised			0.2
BWXT Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefits realized related to the stock options exercised			$ 1.6
Nonvested cash-settled performance units (in shares)			510,000	545,000
BWXT Performance Shares \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage			0.00%
BWXT Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage			200.00%
BWXT Performance Shares \| Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage			123.00%
BWXT Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefits realized related to the stock options exercised			$ 1.3
Nonvested cash-settled performance units (in shares)			242,000	221,000
Cash Settled Performance Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested cash-settled performance units (in shares)			6,353
Nonvested cash-settled performance units value per share			$ 58.08
Nonvested cash-settled performance units assumed weighted average vesting			123.00%
Cash Settled Performance Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage			0.00%
Cash Settled Performance Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage			200.00%
Cash Settled Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested cash-settled performance units (in shares)			2,394
Nonvested cash-settled performance units value per share			$ 58.08
2010 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized for issuance (in shares)						2,300,000
Minimum percentage of fair market value closing price						100.00%
Expiry date of common stock grants						10 years
Shares available for issuance of awards in future (in shares)			3,720,491
Number of shares authorized for issuance (in shares)							10,000,000
2012 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum percentage of fair market value closing price		100.00%
Expiry date of common stock grants		10 years
Total unrecognized estimated compensation expense, nonvested awards			$ 13.5
Unrecognized estimated compensation expense to be recognized, weighted-average period			1 year 9 months 18 days
2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized for issuance (in shares)	1,450,000
Minimum percentage of fair market value closing price	100.00%
Expiry date of common stock grants	10 years

Revenue Recognition

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Revenue Recognition

REVENUE RECOGNITION

Contracts and Revenue Recognition

Government Operations

Our Government Operations segment recognizes revenue over time for the manufacturing of naval nuclear reactor components and fuel, submarine missile launch tubes, the downblending of high-enriched uranium and for the development of advanced nuclear reactors for power and propulsion applications. Certain of our contracts contain two or more different types of components, each of which we identify as a separate performance obligation. We recognize revenue using a cost-to-cost method to measure progress as control is continually transferred to the customer as we incur costs on the performance obligations. We determine the stand-alone selling price of our performance obligations based on the expected cost plus margin approach. We allocate revenue to the individual performance obligations within contracts with multiple performance obligations based on the stand-alone selling price of the individual performance obligations.

Our fixed-price incentive fee contracts include incentives that we concluded to be variable consideration. The amount of the variable consideration to which we are entitled is dependent on our actual costs incurred on the performance obligation compared to the target costs for that performance obligation and subject to incentive price revisions included within the contracts. We include these incentive fees in revenue when there is sufficient evidence to determine that the variable consideration is not constrained. The remaining contracts typically have immaterial amounts of variable consideration and have a single performance obligation. Our estimates of variable consideration and total estimated costs at completion are determined through a detailed process based on historical performance and our expertise using the most likely method. Variations from estimated contract performance could result in a material effect on our financial condition and results of operations in future periods.

Our Government Operations segment's contracts primarily allow for billings as costs are incurred, subject to certain retainages on our fixed-price incentive fee contracts that require milestones to be reached for the remaining consideration to be paid. Our fuel and downblending contracts allow billing when we achieve certain milestones related to our progress.

Commercial Operations

Our Commercial Operations segment recognizes revenue over time using a cost-to-cost method for the manufacturing of large components, non-standard parts, fuel bundles and service contracts as control continually transfers to the customers. For standard parts, revenue is recognized at the point in time control transfers to the customer, which is consistent with the transfer of ownership. For medical radioisotopes, we recognize revenue either at the point in time control transfers to the customer or over time using a unit of output method. This segment generates revenue primarily from firm-fixed-price contracts that do not contain variable consideration as well as time-and-materials based contracts. Certain of these contracts contain assurance warranties and/or provisions for liquidated damages, which are expected to have an immaterial impact to the contracts based on our historical experience. We are entitled to payment on the majority of our Commercial Operations segment contracts when we achieve certain milestones related to our progress.

Disaggregated Revenues

We allocate geographic revenues based on the location of the customers' operations. Revenues by geographic area and customer type were as follows:


	Year Ended December 31, 2022				Year Ended December 31, 2021						Year Ended December 31, 2020
	Government Operations		Commercial Operations		Total		Government Operations		Commercial Operations			Total		Government Operations		Commercial Operations		Total
	(In thousands)
United States:
Government	$	1,703,005	$	—	$	1,703,005	$	1,624,078	$	—		$	1,624,078	$	1,635,399	$	—	$	1,635,399
Non-Government	91,653		31,120		122,773		90,421		44,102			134,523		116,356		35,432		151,788
	$	1,794,658	$	31,120	$	1,825,778	$	1,714,499	$	44,102		$	1,758,601	$	1,751,755	$	35,432	$	1,787,187
Canada:
Government	$	79	$	—	$	79	$	—	$	—		$	—	$	—	$	—	$	—
Non-Government	3,134		373,705		376,839		3,417		345,412			348,829		4,357		309,433		313,790
	$	3,213	$	373,705	$	376,918	$	3,417	$	345,412		$	348,829	$	4,357	$	309,433	$	313,790
Other:
Government	$	1,356	$	—	$	1,356	$	—	$	—		$	—	$	—	$	—	$	—
Non-Government	9,256		22,533		31,789		7,181		17,568			24,749		7,015		26,404		33,419
	$	10,612	$	22,533	$	33,145	$	7,181	$	17,568		$	24,749	$	7,015	$	26,404	$	33,419
Segment Revenues	$	1,808,483	$	427,358	2,235,841		$	1,725,097	$	407,082		2,132,179		$	1,763,127	$	371,269	2,134,396
Eliminations					(3,007)							(8,105)						(10,880)
Revenues					$	2,232,834						$	2,124,074					$	2,123,516

Revenues by timing of transfer of goods or services were as follows:


	Year Ended December 31, 2022				Year Ended December 31, 2021						Year Ended December 31, 2020
	Government Operations		Commercial Operations		Total		Government Operations		Commercial Operations			Total		Government Operations		Commercial Operations		Total
	(In thousands)
Over time	$	1,798,388	$	370,198	$	2,168,586	$	1,724,961	$	355,477		$	2,080,438	$	1,763,043	$	322,745	$	2,085,788
Point-in-time	10,095		57,160		67,255		136		51,605			51,741		84		48,524		48,608
Segment Revenues	$	1,808,483	$	427,358	2,235,841		$	1,725,097	$	407,082		2,132,179		$	1,763,127	$	371,269	2,134,396
Eliminations					(3,007)							(8,105)						(10,880)
Revenues					$	2,232,834						$	2,124,074					$	2,123,516

Revenues by contract type were as follows:


	Year Ended December 31, 2022				Year Ended December 31, 2021						Year Ended December 31, 2020
	Government Operations		Commercial Operations		Total		Government Operations		Commercial Operations			Total		Government Operations		Commercial Operations		Total
	(In thousands)
Fixed-Price Incentive Fee	$	1,226,265	$	9,728	$	1,235,993	$	1,244,916	$	9,279		$	1,254,195	$	1,226,748	$	1,578	$	1,228,326
Firm-Fixed-Price	334,076		300,129		634,205		307,652		307,200			614,852		336,496		296,394		632,890
Cost-Plus Fee	244,063		—		244,063		165,519		—			165,519		190,799		—		190,799
Time-and-Materials	4,079		117,501		121,580		7,010		90,603			97,613		9,084		73,297		82,381
Segment Revenues	$	1,808,483	$	427,358	2,235,841		$	1,725,097	$	407,082		2,132,179		$	1,763,127	$	371,269	2,134,396
Eliminations					(3,007)							(8,105)						(10,880)
Revenues					$	2,232,834						$	2,124,074					$	2,123,516

Performance Obligations

As we progress on our contracts and the underlying performance obligations for which we recognize revenue over time, we refine our estimates of variable consideration and total estimated costs at completion, which impact the overall profitability on our contracts and performance obligations. Changes in these estimates result in the recognition of cumulative catch-up adjustments that impact our revenues and/or costs of contracts. During the years ended December 31, 2022, 2021 and 2020, we recognized net favorable changes in estimates that resulted in increases in revenues of $26.6 million, $30.7 million and $44.9 million, respectively, as well as increases (decreases) in cost of operations of $2.2 million, $4.2 million and $2.1 million, respectively. Included in these amounts are contract adjustments for cost overruns related to the manufacture of non-nuclear components being produced within our Government Operations segment. We recognized a decrease in operating income of $11.3 million for the year ended December 31, 2022 related to this matter. These contract adjustments resulted in a decrease in earnings per share of $0.09 for the year ended December 31, 2022. We are pursuing recovery of cost overruns related to this project.

Contract Assets and Liabilities

We include revenues and related costs incurred, plus accumulated contract costs that exceed amounts invoiced to customers under the terms of the contracts, in Contracts in progress. We include in Advance billings on contracts billings that exceed accumulated contract costs and revenues and costs recognized over time. In accordance with contract terms, certain amounts that are withheld by our customers and are classified within Retainages. Certain of these amounts require conditions other than the passage of time to be achieved, with the remaining amounts only requiring the passage of time. Most long-term contracts contain provisions for progress payments. Our unbilled receivables do not contain an allowance for credit losses as we expect to invoice customers and collect all amounts for unbilled receivables. Changes in Contracts in progress and Advance billings on contracts are primarily driven by differences in the timing of revenue recognition and billings to our customers. During the year ended December 31, 2022, our unbilled receivables decreased $7.4 million primarily as a result of decreases in cost in excess of billings on our fixed-price incentive fee contracts within our Government Operations segment, partially offset by increases due to the timing of milestone billings on certain firm-fixed-price contracts within our Government Operations and Commercial Operations segments. During the year ended December 31, 2022, our Advance billings on contracts decreased $22.9 million primarily as a result of revenue recognized in excess of billings on certain firm-fixed-price contracts within our Government Operations segment. Our fixed-price incentive fee contracts for our Government Operations segment include provisions that result in an increase in retainages on contracts during the first and third quarters of the year, with larger payments made during the second and fourth quarters. Retainages also vary as a result of timing differences between incurring costs and achieving milestones that allow us to recover these amounts.


	December 31,		December 31,
	2022		2021
	(In thousands)
Included in Contracts in progress:
Unbilled receivables	$	521,291	$	528,644
Retainages (1)	$	48,566	$	51,507
Advance billings on contracts	$	88,726	$	111,619

(1)At December 31, 2021, we also had noncurrent retainages of $1.3 million included in Other Assets.

During the years ended December 31, 2022 and 2021, we recognized $91.9 million and $67.5 million of revenue that was in Advance billings on contracts at the beginning of each year, respectively.

Remaining Performance Obligations

Remaining performance obligations represent the dollar amount of revenue we expect to recognize in the future from performance obligations on contracts previously awarded and in progress. Our backlog is equal to our remaining performance obligations under contracts that meet the criteria in FASB Topic Revenue from Contracts with Customers. At December 31, 2022, our ending backlog was $4,144.3 million, which included $88.7 million of unfunded backlog related to U.S. Government contracts. We expect to recognize approximately 42% of the revenue associated with our backlog by the end of 2023, with the remainder to be recognized thereafter.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI https://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 606
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-Section 50
-Paragraph 13
-Subparagraph (b)(2)
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 624,177	$ 523,711	$ 554,208	$ 530,738	$ 591,975	$ 498,727	$ 505,099	$ 528,273	$ 2,232,834	$ 2,124,074	$ 2,123,516
Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									2,235,841	2,132,179	2,134,396
Eliminations
Disaggregation of Revenue [Line Items]
Revenues									(3,007)	(8,105)	(10,880)
Fixed-Price Incentive Fee
Disaggregation of Revenue [Line Items]
Revenues									1,235,993	1,254,195	1,228,326
Firm-Fixed-Price
Disaggregation of Revenue [Line Items]
Revenues									634,205	614,852	632,890
Cost-Plus Fee
Disaggregation of Revenue [Line Items]
Revenues									244,063	165,519	190,799
Time-and-Materials
Disaggregation of Revenue [Line Items]
Revenues									121,580	97,613	82,381
Over time
Disaggregation of Revenue [Line Items]
Revenues									2,168,586	2,080,438	2,085,788
Point-in-time
Disaggregation of Revenue [Line Items]
Revenues									67,255	51,741	48,608
UNITED STATES \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									1,825,778	1,758,601	1,787,187
UNITED STATES \| Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									1,703,005	1,624,078	1,635,399
UNITED STATES \| Non-Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									122,773	134,523	151,788
Canada \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									376,918	348,829	313,790
Canada \| Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									79	0	0
Canada \| Non-Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									376,839	348,829	313,790
Other \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									33,145	24,749	33,419
Other \| Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									1,356	0	0
Other \| Non-Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									31,789	24,749	33,419
Government Operations
Disaggregation of Revenue [Line Items]
Revenues									1,808,483	1,725,097	1,763,127
Government Operations \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									1,808,483	1,725,097	1,763,127
Government Operations \| Eliminations
Disaggregation of Revenue [Line Items]
Revenues									(2,941)	(7,327)	(10,327)
Government Operations \| Fixed-Price Incentive Fee
Disaggregation of Revenue [Line Items]
Revenues									1,226,265	1,244,916	1,226,748
Government Operations \| Firm-Fixed-Price
Disaggregation of Revenue [Line Items]
Revenues									334,076	307,652	336,496
Government Operations \| Cost-Plus Fee
Disaggregation of Revenue [Line Items]
Revenues									244,063	165,519	190,799
Government Operations \| Time-and-Materials
Disaggregation of Revenue [Line Items]
Revenues									4,079	7,010	9,084
Government Operations \| Over time
Disaggregation of Revenue [Line Items]
Revenues									1,798,388	1,724,961	1,763,043
Government Operations \| Point-in-time
Disaggregation of Revenue [Line Items]
Revenues									10,095	136	84
Government Operations \| UNITED STATES \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									1,794,658	1,714,499	1,751,755
Government Operations \| UNITED STATES \| Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									1,703,005	1,624,078	1,635,399
Government Operations \| UNITED STATES \| Non-Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									91,653	90,421	116,356
Government Operations \| Canada \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									3,213	3,417	4,357
Government Operations \| Canada \| Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									79	0	0
Government Operations \| Canada \| Non-Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									3,134	3,417	4,357
Government Operations \| Other \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									10,612	7,181	7,015
Government Operations \| Other \| Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									1,356	0	0
Government Operations \| Other \| Non-Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									9,256	7,181	7,015
Commercial Operations
Disaggregation of Revenue [Line Items]
Revenues									427,358	407,082	371,269
Commercial Operations \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									427,358	407,082	371,269
Commercial Operations \| Eliminations
Disaggregation of Revenue [Line Items]
Revenues									(66)	(778)	(553)
Commercial Operations \| Fixed-Price Incentive Fee
Disaggregation of Revenue [Line Items]
Revenues									9,728	9,279	1,578
Commercial Operations \| Firm-Fixed-Price
Disaggregation of Revenue [Line Items]
Revenues									300,129	307,200	296,394
Commercial Operations \| Cost-Plus Fee
Disaggregation of Revenue [Line Items]
Revenues									0	0	0
Commercial Operations \| Time-and-Materials
Disaggregation of Revenue [Line Items]
Revenues									117,501	90,603	73,297
Commercial Operations \| Over time
Disaggregation of Revenue [Line Items]
Revenues									370,198	355,477	322,745
Commercial Operations \| Point-in-time
Disaggregation of Revenue [Line Items]
Revenues									57,160	51,605	48,524
Commercial Operations \| UNITED STATES \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									31,120	44,102	35,432
Commercial Operations \| UNITED STATES \| Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									0	0	0
Commercial Operations \| UNITED STATES \| Non-Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									31,120	44,102	35,432
Commercial Operations \| Canada \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									373,705	345,412	309,433
Commercial Operations \| Canada \| Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									0	0	0
Commercial Operations \| Canada \| Non-Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									373,705	345,412	309,433
Commercial Operations \| Other \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									22,533	17,568	26,404
Commercial Operations \| Other \| Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									0	0	0
Commercial Operations \| Other \| Non-Government \| Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues									$ 22,533	$ 17,568	$ 26,404

Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2022

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

QUARTERLY FINANCIAL DATA (UNAUDITED)

The following tables set forth selected unaudited quarterly financial information for the years ended December 31, 2022 and 2021:


	Year Ended December 31, 2022 Quarter Ended
	March 31, 2022		June 30, 2022		September 30, 2022		December 31, 2022
	(In thousands, except per share amounts)
Revenues	$	530,738	$	554,208	$	523,711	$	624,177
Operating income (1)	$	71,573	$	95,237	$	79,878	$	101,883
Equity in income of investees	$	8,779	$	11,319	$	14,783	$	11,092
Net Income Attributable to BWX Technologies, Inc.	$	59,010	$	74,613	$	61,603	$	42,965
Earnings per common share:
Basic:
Net Income Attributable to BWX Technologies, Inc.	$	0.64	$	0.82	$	0.67	$	0.47
Diluted:
Net Income Attributable to BWX Technologies, Inc.	$	0.64	$	0.82	$	0.67	$	0.47

(1)Includes equity in income of investees.


	Year Ended December 31, 2021 Quarter Ended
	March 31, 2021		June 30, 2021		September 30, 2021		December 31, 2021
	(In thousands, except per share amounts)
Revenues	$	528,273	$	505,099	$	498,727	$	591,975
Operating income (1)	$	82,414	$	73,751	$	87,468	$	102,215
Equity in income of investees	$	8,316	$	7,263	$	10,618	$	7,301
Net Income Attributable to BWX Technologies, Inc.	$	69,749	$	59,347	$	59,914	$	116,861
Earnings per common share:
Basic:
Net Income Attributable to BWX Technologies, Inc.	$	0.73	$	0.62	$	0.64	$	1.27
Diluted:
Net Income Attributable to BWX Technologies, Inc.	$	0.73	$	0.62	$	0.63	$	1.26

(1)Includes equity in income of investees.

In the quarter ended June 30, 2022, we recognized an unfavorable contract adjustment of $11.3 million related to the manufacture of non-nuclear components. In the quarter ended September 30, 2021, we recognized an early redemption premium of $10.8 million and wrote-off deferred debt issuance costs totaling $4.2 million.

We immediately recognize actuarial gains (losses) for our pension and postretirement benefit plans in earnings as a component of net periodic benefit cost. Recorded in the quarters ended December 31, 2022 and 2021, the effects of these adjustments on pre-tax income were $(46.6) million and $39.6 million, respectively.

Basis of Presentation and Significant Accounting Policies - Changes in Carrying Amount of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Balance at beginning of period	$ 185,551	$ 192,751	$ 191,392
Acquisitions (Note 2)	28,500	0	8,180
Amortization expense	(10,901)	(9,329)	(8,824)
Translation and other	(9,538)	2,129	2,003
Balance at end of period	$ 193,612	$ 185,551	192,751
Nuclear Services Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Translation and other			$ (600)

Risks and Uncertainties	12 Months Ended
Risks and Uncertainties	Dec. 31, 2022
Risks and Uncertainties [Abstract]
Risks and Uncertainties	RISKS AND UNCERTAINTIES Revenue Recognized Over Time As of December 31, 2022, in accordance with the method of recognizing revenue over time, we have provided for our estimated costs to complete all of our ongoing contracts. However, it is possible that current estimates could change due to unforeseen events, which could result in adjustments to overall contract costs. The risk on fixed-price contracts is that revenue from the customer does not cover increases in our costs. It is possible that current estimates could materially change for various reasons, including, but not limited to, fluctuations in forecasted labor productivity or steel and other raw material prices. Increases in costs on our fixed-price contracts could have a material adverse impact on our consolidated financial condition, results of operations and cash flows. Alternatively, reductions in overall contract costs at completion could materially improve our consolidated financial condition, results of operations and cash flows. Insurance Upon the February 22, 2006 effectiveness of the settlement relating to the Chapter 11 proceedings involving several of our former subsidiaries, most of our subsidiaries contributed substantial insurance rights to the asbestos personal injury trust, including rights to (1) certain pre-1979 primary and excess insurance coverages and (2) certain of our 1979-1986 excess insurance coverage. These insurance rights provided coverage for, among other things, asbestos and other personal injury claims, subject to the terms and conditions of the policies. The contribution of these insurance rights was made in exchange for the agreement on the part of the representatives of the asbestos claimants, including the representative of future claimants, to the entry of a permanent injunction, pursuant to Section 524(g) of the U.S. Bankruptcy Code, to channel to the asbestos trust all asbestos-related general liability claims against our subsidiaries and former subsidiaries arising out of, resulting from or attributable to their operations, and the implementation of related releases and indemnification provisions protecting those subsidiaries and their affiliates from future liability for such claims. Although we are not aware of any significant, unresolved claims against our subsidiaries and former subsidiaries that are not subject to the channeling injunction and that relate to the periods during which such excess insurance coverage related, with the contribution of these insurance rights to the asbestos personal injury trust, it is possible that we could have underinsured or uninsured exposure for non-derivative asbestos claims or other personal injury or other claims that would have been insured under these coverages had the insurance rights not been contributed to the asbestos personal injury trust. On June 30, 2015, we completed the spin-off of our former Power Generation business (the "spin-off") into an independent, publicly traded company named Babcock & Wilcox Enterprises, Inc. ("BWE"). In conjunction with the spin-off, claims and liabilities associated with the asbestos personal injury, property damage and indirect property damage claims mentioned above have been expressly assumed by BWE pursuant to the master separation agreement between us and BWE.

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 238,620	$ 306,288	$ 279,196
Other Comprehensive Income (Loss):
Currency translation adjustments	(34,834)	6,173	15,685
Derivative financial instruments:
Unrealized gains (losses) arising during the period, net of tax (provision) benefit of $(89), $170 and $24, respectively	267	(500)	(73)
Reclassification adjustment for losses (gains) included in net income, net of tax (benefit) provision of $(181), $(103) and $173, respectively	532	302	(487)
Benefit obligations:
Unrecognized losses arising during the period, net of tax benefit of $802, $1,301 and $513, respectively	(2,559)	(4,415)	(1,820)
Recognition of benefit plan costs, net of tax benefit of $(657), $(624) and $(645), respectively	2,626	2,295	2,532
Investments:
Unrealized (losses) gains arising during the period, net of tax benefit (provision) of $28, $(24) and $(56), respectively	(105)	90	(191)
Other Comprehensive Income (Loss)	(34,073)	3,945	15,646
Total Comprehensive Income	204,547	310,233	294,842
Comprehensive Income Attributable to Noncontrolling Interest	(429)	(417)	(526)
Comprehensive Income Attributable to BWX Technologies, Inc.	$ 204,118	$ 309,816	$ 294,316

Pension Plans and Postretirement Benefits - Additional Information (Detail) $ in Thousands	1 Months Ended		12 Months Ended
	Nov. 30, 2022 USD ($)	Dec. 31, 2021 USD ($) retiree	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) retiree	Dec. 31, 2020 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Service cost			$ 11,800	$ 12,400	$ 11,300
Other components of net periodic benefit cost			(4,000)	$ (92,900)	(31,600)
Pension settlement related charges		$ 38,300
Number of retirees transferred to annuity contract \| retiree		400		400
Other comprehensive loss as components of net periodic benefit cost for pension benefit in the current fiscal year			3,300
Other comprehensive income as components of net periodic benefit cost for other benefit in the current fiscal year			$ 0
Percentage of investment return on domestic plan assets			(22.00%)	9.00%
Liability for group annuity contract		$ 45,600		$ 45,600
Vesting period for employer matching contributions			3 years
Thrift Plan
Defined Benefit Plan Disclosure [Line Items]
Percentage of matching contribution by employer			50.00%
Thrift Plan \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Employer matching percentage			6.00%
Thrift Plan and MII Thrift Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions			$ 37,600	37,500	35,800
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost			11,116	11,667	$ 10,650
Increase in pension plan benefit obligation			(295,100)	(43,000)
Pension settlement-related charges	$ 12,600
Pension, benefit obligation, payment for settlement	$ 48,800
Pension settlement related charges			$ 48,777	$ 38,330

Pension Plans and Postretirement Benefits - Obligations and Funded Status (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Change in benefit obligation:
Service cost				$ 11,800	$ 12,400	$ 11,300
Settlements	$ (38,300)
Actuarial loss (gain)		$ 46,600	$ (39,600)
Change in plan assets:
Balance at beginning of period				1,310,311
Company contributions				14,172
Balance at end of period	1,310,311	921,307	1,310,311	921,307	1,310,311
Amounts recognized in the balance sheet consist of:
Accumulated postretirement benefit obligation	(24,333)	(18,157)	(24,333)	(18,157)	(24,333)
Pension liability	(59,388)	(57,832)	(59,388)	(57,832)	(59,388)
Pension Plan
Change in benefit obligation:
Benefit obligation at beginning of period				1,308,266	1,414,055
Service cost				11,116	11,667	10,650
Interest cost				30,924	27,170	37,199
Plan participants' contributions				224	199
Amendments				3,100	2,314
Settlements				(48,777)	(38,330)
Actuarial loss (gain)				(307,946)	(45,476)
Foreign currency exchange rate changes				(6,564)	1,669
Benefits paid				(63,365)	(65,002)
Benefit obligation at end of period	1,308,266	926,978	1,308,266	926,978	1,308,266	1,414,055
Change in plan assets:
Balance at beginning of period				1,256,799	1,281,232
Actual return on plan assets				(263,881)	72,030
Plan participants' contributions				224	199
Company contributions					6,164
Settlements				(61,416)	(39,439)
Foreign currency exchange rate changes				(6,842)	1,615
Benefits paid				(63,365)	(65,002)
Balance at end of period	1,256,799	875,691	1,256,799	875,691	1,256,799	1,281,232
Funded status	(51,467)	(51,287)	(51,467)	(51,287)	(51,467)
Amounts recognized in the balance sheet consist of:
Prepaid postretirement benefit obligation	0	0	0	0	0
Prepaid pension	10,573	9,542	10,573	9,542	10,573
Accrued employee benefits	(3,125)	(2,997)	(3,125)	(2,997)	(3,125)
Accumulated postretirement benefit obligation	0	0	0	0	0
Pension liability	(58,915)	(57,832)	(58,915)	(57,832)	(58,915)
Accrued benefit liability, net	(51,467)	(51,287)	(51,467)	(51,287)	(51,467)
Amount recognized in accumulated comprehensive income (before taxes):
Prior service cost (credit)	20,536	20,363	20,536	20,363	20,536
Plans with accumulated benefit obligation in excess of plan assets:
Projected benefit obligation	1,172,881	877,431	1,172,881	877,431	1,172,881
Accumulated benefit obligation	1,166,855	873,185	1,166,855	873,185	1,166,855
Fair value of plan assets	1,110,841	816,693	1,110,841	816,693	1,110,841
Plans with plan assets in excess of accumulated benefit obligation:
Projected benefit obligation	135,385	49,547	135,385	49,547	135,385
Accumulated benefit obligation	135,375	49,547	135,375	49,547	135,375
Fair value of plan assets	145,958	58,999	145,958	58,999	145,958
Other Benefits
Change in benefit obligation:
Benefit obligation at beginning of period				59,301	61,086
Service cost				650	760	642
Interest cost				1,387	1,197	1,612
Plan participants' contributions				346	488
Amendments				261	3,402
Settlements				0	0
Actuarial loss (gain)				(14,747)	(4,944)
Foreign currency exchange rate changes				(921)	197
Benefits paid				(3,227)	(2,885)
Benefit obligation at end of period	59,301	43,050	59,301	43,050	59,301	61,086
Change in plan assets:
Balance at beginning of period				53,512	52,077
Actual return on plan assets				(6,003)	2,898
Plan participants' contributions				346	488
Company contributions				1,032	1,008
Settlements				0	0
Foreign currency exchange rate changes				0	0
Benefits paid				(3,271)	(2,959)
Balance at end of period	53,512	45,616	53,512	45,616	53,512	$ 52,077
Funded status	(5,789)	2,566	(5,789)	2,566	(5,789)
Amounts recognized in the balance sheet consist of:
Prepaid postretirement benefit obligation	20,122	22,232	20,122	22,232	20,122
Prepaid pension	0	0	0	0	0
Accrued employee benefits	(1,578)	(1,509)	(1,578)	(1,509)	(1,578)
Accumulated postretirement benefit obligation	(24,333)	(18,157)	(24,333)	(18,157)	(24,333)
Pension liability	0	0	0	0	0
Accrued benefit liability, net	(5,789)	2,566	(5,789)	2,566	(5,789)
Amount recognized in accumulated comprehensive income (before taxes):
Prior service cost (credit)	2,520	2,750	2,520	2,750	2,520
Plans with accumulated benefit obligation in excess of plan assets:
Accumulated benefit obligation	23,503	17,795	23,503	17,795	23,503
Fair value of plan assets	0	0	0	0	0
Plans with plan assets in excess of accumulated benefit obligation:
Accumulated benefit obligation	35,798	25,255	35,798	25,255	35,798
Fair value of plan assets	$ 53,512	$ 45,616	$ 53,512	$ 45,616	$ 53,512

Investments

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Investments

INVESTMENTS

The following is a summary of our investments at December 31, 2022:


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
Equity securities

Mutual funds	$	6,352	$	—	$	(11)	$	6,341
Available-for-sale securities
U.S. Government and agency securities	3,247		10		(4)		3,253
Corporate bonds	2,033		236		(4)		2,265
Asset-backed securities and collateralized mortgage obligations	103		—		(61)		42
Total	$	11,735	$	246	$	(80)	$	11,901

The following is a summary of our investments at December 31, 2021:


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
Equity securities

Mutual funds	$	6,001	$	1,649	$	—	$	7,650
Available-for-sale securities
U.S. Government and agency securities	2,742		—		(4)		2,738
Corporate bonds	2,559		374		(7)		2,926
Asset-backed securities and collateralized mortgage obligations	107		—		(52)		55
Total	$	11,409	$	2,023	$	(63)	$	13,369

Basis of Presentation and Significant Accounting Policies - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Amortized And Unamortized Intangible Assets [Line Items]
Amortized intangible assets	$ 201,035	$ 184,270	$ 181,921
Accumulated amortization	(51,253)	(42,549)	(33,000)
Net amortized intangible assets	149,782	141,721	148,921
Technical support agreement
Schedule Of Amortized And Unamortized Intangible Assets [Line Items]
Amortized intangible assets	65,069	69,781	68,785
Accumulated amortization	(12,495)	(10,366)	(7,227)
Customer relationships
Schedule Of Amortized And Unamortized Intangible Assets [Line Items]
Amortized intangible assets	56,176	40,247	39,954
Accumulated amortization	(20,590)	(18,176)	(15,996)
Unpatented technology
Schedule Of Amortized And Unamortized Intangible Assets [Line Items]
Amortized intangible assets	39,609	38,073	37,529
Accumulated amortization	(7,966)	(6,398)	(4,584)
CNSC class 1B nuclear facility license
Schedule Of Amortized And Unamortized Intangible Assets [Line Items]
Amortized intangible assets	25,094	26,911	26,528
Accumulated amortization	(5,052)	(4,521)	(3,573)
Acquired backlog
Schedule Of Amortized And Unamortized Intangible Assets [Line Items]
Amortized intangible assets	13,537	7,595	7,487
Accumulated amortization	(4,474)	(2,531)	(1,248)
Patented technology
Schedule Of Amortized And Unamortized Intangible Assets [Line Items]
Amortized intangible assets	738	792	780
Accumulated amortization	(405)	(363)	(286)
All other
Schedule Of Amortized And Unamortized Intangible Assets [Line Items]
Amortized intangible assets	812	871	858
Accumulated amortization	(271)	(194)	(86)
NRC category 1 license
Schedule Of Amortized And Unamortized Intangible Assets [Line Items]
Unamortized intangible assets	$ 43,830	$ 43,830	$ 43,830

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Pension liability	$ 11,931	$ 12,047
Accrued warranty expense	1,694	1,363
Capitalized Section 174 expenditures	11,145	0
Accrued vacation pay	3,246	7,633
Accrued liabilities for self-insurance (including postretirement health care benefits)	17	2,095
Accrued liabilities for executive and employee incentive compensation	12,475	10,733
Environmental and products liabilities	20,983	21,050
Lease liabilities	5,298	3,667
Investments in joint ventures and affiliated companies	1,494	2,283
Long-term contracts	14,442	21,562
Accrued payroll taxes	2,504	4,753
U.S. federal tax credits and loss carryforward	7,113	7,023
U.S. state tax credits and loss carryforward	4,731	4,866
Foreign tax credit and loss carryforward	20,209	16,477
Other	2,719	2,568
Gross deferred tax assets	120,001	118,120
Valuation allowance for deferred tax assets	(13,022)	(13,218)
Total deferred tax assets	106,979	104,902
Deferred tax liabilities:
Property, plant and equipment	75,334	66,636
Right-of-use lease assets	12,246	11,666
Intangibles	22,404	16,365
Total deferred tax liabilities	109,984	94,667
Net deferred tax assets (liabilities)	$ (3,005)
Net deferred tax assets (liabilities)		$ 10,235

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Reconciliation of Unrecognized Tax Benefits


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Balance at beginning of period	$	—	$	5,852	$	3,899
Increases based on tax positions taken in the current year	—		964		2,075
Increases based on tax positions taken in the prior years	—		—		—
Decreases based on tax positions taken in the prior years	—		—		—
Decreases due to settlements with tax authorities	—		(6,775)		—
Decreases due to lapse of applicable statute of limitation	—		(41)		(123)
Other, net	—		—		1
Balance at end of period	$	—	$	—	$	5,852

Components of Deferred Tax Assets and Liabilities

Significant components of deferred tax assets and liabilities as of December 31, 2022 and 2021 were as follows:


	December 31,
	2022		2021
	(In thousands)
Deferred tax assets:
Pension liability	$	11,931	$	12,047
Accrued warranty expense	1,694		1,363
Capitalized Section 174 expenditures	11,145		—
Accrued vacation pay	3,246		7,633
Accrued liabilities for self-insurance (including postretirement health care benefits)	17		2,095
Accrued liabilities for executive and employee incentive compensation	12,475		10,733
Environmental and products liabilities	20,983		21,050
Lease liabilities	5,298		3,667
Investments in joint ventures and affiliated companies	1,494		2,283
Long-term contracts	14,442		21,562
Accrued payroll taxes	2,504		4,753
U.S. federal tax credits and loss carryforward	7,113		7,023
U.S. state tax credits and loss carryforward	4,731		4,866
Foreign tax credit and loss carryforward	20,209		16,477
Other	2,719		2,568
Gross deferred tax assets	120,001		118,120
Valuation allowance for deferred tax assets	(13,022)		(13,218)
Total deferred tax assets	106,979		104,902
Deferred tax liabilities:
Property, plant and equipment	75,334		66,636
Right-of-use lease assets	12,246		11,666
Intangibles	22,404		16,365
Total deferred tax liabilities	109,984		94,667
Net deferred tax assets (liabilities)	$	(3,005)	$	10,235

Income from Continuing Operations Before Provision for Income Taxes

The components of Income before Provision for Income Taxes were as follows:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
U.S.	$	281,677	$	343,091	$	314,150
Other than U.S.	32,700		52,622		48,022
Income before Provision for Income Taxes	$	314,377	$	395,713	$	362,172

Components of Provision for Income Taxes

The components of Provision for Income Taxes were as follows:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Current:
U.S. – federal	$	54,683	$	31,535	$	53,340
U.S. – state and local	5,360		1,030		7,587
Other than U.S.	10,199		16,769		14,159
Total current	70,242		49,334		75,086
Deferred:
U.S. – federal	5,755		40,463		10,852
U.S. – state and local	(34)		3,473		(536)
Other than U.S.	(206)		(3,845)		(2,426)
Total deferred	5,515		40,091		7,890
Provision for Income Taxes	$	75,757	$	89,425	$	82,976

Reconciliation of Income Tax Provision Related to Continuing Operations from U.S. Statutory Federal Tax Rate

The following is a reconciliation of our income tax provision from the U.S. statutory federal tax rate to our consolidated effective tax rate:


	Year Ended December 31,
	2022		2021		2020
U.S. federal statutory tax rate	21.0	%	21.0	%	21.0	%
State and local income taxes	1.7	%	1.1	%	1.9	%
Foreign rate differential	0.5	%	0.6	%	0.6	%
Excess tax deductions on equity compensation	(0.1)	%	(0.1)	%	(0.3)	%
Other	1.0	%	—	%	(0.3)	%
Effective tax rate	24.1	%	22.6	%	22.9	%

Valuation Allowance for Deferred Tax Assets

The following is an analysis of our valuation allowance for deferred tax assets:


	Beginning Balance		Charges To Costs and Expenses	Charged To Other Accounts	Ending Balance
	(In thousands)
Year Ended December 31, 2022	$	(13,218)	196	—	$	(13,022)
Year Ended December 31, 2021	$	(12,892)	(326)	—	$	(13,218)
Year Ended December 31, 2020	$	(13,578)	771	(85)	$	(12,892)

Investments (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Summary of Available for Sale Securities

The following is a summary of our investments at December 31, 2022:


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
Equity securities

Mutual funds	$	6,352	$	—	$	(11)	$	6,341
Available-for-sale securities
U.S. Government and agency securities	3,247		10		(4)		3,253
Corporate bonds	2,033		236		(4)		2,265
Asset-backed securities and collateralized mortgage obligations	103		—		(61)		42
Total	$	11,735	$	246	$	(80)	$	11,901

The following is a summary of our investments at December 31, 2021:


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
Equity securities

Mutual funds	$	6,001	$	1,649	$	—	$	7,650
Available-for-sale securities
U.S. Government and agency securities	2,742		—		(4)		2,738
Corporate bonds	2,559		374		(7)		2,926
Asset-backed securities and collateralized mortgage obligations	107		—		(52)		55
Total	$	11,409	$	2,023	$	(63)	$	13,369

Pension Plans and Postretirement Benefits - Cash Flows (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
UNITED STATES \| Pension Plan
Expected employer contributions to trusts of defined benefit plans:
Expected benefit payments, 2023	$ 0
Expected benefit payments:
Expected benefit payments, 2023	62,828
Expected benefit payments, 2024	64,396
Expected benefit payments, 2025	65,493
Expected benefit payments, 2026	66,355
Expected benefit payments, 2027	66,992
Expected benefit payments, 2028-2029	333,481
UNITED STATES \| Other Benefits
Expected employer contributions to trusts of defined benefit plans:
Expected benefit payments, 2023	0
Expected benefit payments:
Expected benefit payments, 2023	2,660
Expected benefit payments, 2024	2,654
Expected benefit payments, 2025	2,601
Expected benefit payments, 2026	2,527
Expected benefit payments, 2027	2,468
Expected benefit payments, 2028-2029	11,398
Canada
Expected employer contributions to trusts of defined benefit plans:
Expected benefit payments, 2023	2,333
Canada \| Pension Plan
Expected benefit payments:
Expected benefit payments, 2023	758
Expected benefit payments, 2024	892
Expected benefit payments, 2025	1,026
Expected benefit payments, 2026	1,157
Expected benefit payments, 2027	1,286
Expected benefit payments, 2028-2029	7,706
Canada \| Other Benefits
Expected benefit payments:
Expected benefit payments, 2023	544
Expected benefit payments, 2024	581
Expected benefit payments, 2025	626
Expected benefit payments, 2026	684
Expected benefit payments, 2027	720
Expected benefit payments, 2028-2029	$ 3,784

Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

Schedule of Operating Results by Segment

1. Information about Operations in our Different Industry Segments:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
REVENUES:
Government Operations	$	1,808,483	$	1,725,097	$	1,763,127
Commercial Operations	427,358		407,082		371,269
Eliminations (1)	(3,007)		(8,105)		(10,880)
	$	2,232,834	$	2,124,074	$	2,123,516

(1)Segment revenues are net of the following intersegment transfers:


Government Operations Transfers	$	(2,941)	$	(7,327)	$	(10,327)
Commercial Operations Transfers	(66)		(778)		(553)
	$	(3,007)	$	(8,105)	$	(10,880)


OPERATING INCOME:
Government Operations	$	336,501	$	329,549	$	345,250
Commercial Operations	27,418		35,243		36,915
	$	363,919	$	364,792	$	382,165
Unallocated Corporate (1)	(15,348)		(18,944)		(23,613)
Total Operating Income (2)	$	348,571	$	345,848	$	358,552
Other Income (Expense)	(34,194)		49,865		3,620
Income before Provision for Income Taxes	$	314,377	$	395,713	$	362,172

(1)Unallocated Corporate includes general corporate overhead not allocated to segments.

(2)The following amounts are included in Operating Income:


Losses (Gains) on Asset Disposals and Impairments, Net:
Government Operations	$	(250)	$	(8)	$	320
Commercial Operations	6,233		(2,548)		(1,681)
Unallocated Corporate	(463)		(976)		—
	$	5,520	$	(3,532)	$	(1,361)
Equity in Income of Investees:
Government Operations	$	45,973	$	33,498	$	27,152
Commercial Operations	—		—		—
	$	45,973	$	33,498	$	27,152


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
CAPITAL EXPENDITURES:
Government Operations	$	103,093	$	147,051	$	137,197
Commercial Operations	88,853		153,571		106,614
Segment Capital Expenditures	191,946		300,622		243,811
Corporate Capital Expenditures	6,366		10,430		11,216
Total Capital Expenditures	$	198,312	$	311,052	$	255,027
DEPRECIATION AND AMORTIZATION:
Government Operations	$	47,982	$	42,485	$	35,398
Commercial Operations	18,805		19,884		18,431
Segment Depreciation and Amortization	66,787		62,369		53,829
Corporate Depreciation and Amortization	7,055		6,711		6,845
Total Depreciation and Amortization	$	73,842	$	69,080	$	60,674


	December 31,
	2022		2021		2020
	(In thousands)
SEGMENT ASSETS:
Government Operations	$	1,498,472	$	1,430,863	$	1,353,122
Commercial Operations	1,005,545		976,382		830,226
Segment Assets	2,504,017		2,407,245		2,183,348
Corporate Assets	114,922		94,135		110,155
Total Assets	$	2,618,939	$	2,501,380	$	2,293,503
INVESTMENT IN UNCONSOLIDATED AFFILIATES:
Government Operations	$	100,198	$	85,284	$	71,806
Commercial Operations	—		—		—
Total Investment in Unconsolidated Affiliates	$	100,198	$	85,284	$	71,806

Schedule of Revenue Information from Products and Service Lines

2. Information about our Product and Service Lines:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
REVENUES:
Government Operations:
Nuclear Components and Fuel	$	1,494,810	$	1,481,416	$	1,512,980
Downblending and Nuclear Services	233,197		198,420		207,221
Advanced Reactor Design and Engineering	80,476		45,261		42,926
	1,808,483		1,725,097		1,763,127
Commercial Operations:
Nuclear Manufacturing	221,458		246,444		250,585
Nuclear Services and Engineering	205,900		160,638		120,684
	427,358		407,082		371,269
Eliminations	(3,007)		(8,105)		(10,880)
	$	2,232,834	$	2,124,074	$	2,123,516

Schedule of Property, Plant and Equipment, Net by Geographical Area

3. Information about our Consolidated Operations in Different Geographic Areas:


	December 31,
	2022		2021		2020
	(In thousands)
NET PROPERTY, PLANT AND EQUIPMENT:
United States	$	743,767	$	698,772	$	603,518
Canada	389,490		346,868		212,953
United Kingdom	1,640		—		—
	$	1,134,897	$	1,045,640	$	816,471

See Note 3 for revenues by geographic area for each of our segments.

Capital Stock	12 Months Ended
Capital Stock	Dec. 31, 2022
Equity [Abstract]
Capital Stock	CAPITAL STOCK On November 6, 2018, our Board of Directors authorized an additional share repurchase of up to an aggregate market value of $250 million during a three-year period from November 6, 2018 to November 6, 2021. This authorization became fully utilized in September 2021. On April 30, 2021, our Board of Directors authorized us to repurchase an indeterminate number of shares of our common stock at an aggregate market value of up to $500 million with no expiration date. In the year ended December 31, 2022, we repurchased 374,568 shares of our common stock for $20.0 million. In the year ended December 31, 2021, we repurchased 4,134,767 shares of our common stock for $225.8 million. In the year ended December 31, 2020, we repurchased 338,521 shares of our common stock for $22.0 million. As of December 31, 2022, we had approximately $397.6 million available to us for share repurchase under the $500 million authorization described above.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI https://asc.fasb.org/topic&trid=2208762

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Section 50
-Paragraph 13
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 505
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-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 14
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644

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-Publisher FASB
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644

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-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496180-112644

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-URI https://asc.fasb.org/extlink&oid=126731327&loc=SL126733271-114008

+ Details

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 238,620	$ 306,288	$ 279,196
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	73,842	69,080	60,674
Income of investees, net of dividends	(3,461)	(13,023)	(2,147)
Provision for deferred taxes	5,515	40,091	7,890
Recognition of (gains) losses for pension and postretirement plans	49,868	(36,647)	9,548
Stock-based compensation expense	14,127	18,613	16,844
Premium for early redemption of senior notes	0	10,752	0
Recognition of debt issuance costs from former debt instruments	46	4,212	665
Other, net	7,649	1,401	(1,457)
Changes in assets and liabilities, net of effects from acquisitions:
Accounts receivable	15,167	84,006	(98,302)
Accounts payable	(40,495)	28,795	(1,241)
Retainages	4,189	3,875	(8,578)
Contracts in progress and advance billings on contracts	(38,615)	(67,137)	(53,242)
Income taxes	(764)	4,116	1,157
Accrued and other current liabilities	(18,948)	(1,991)	6,843
Pension liabilities, accrued postretirement benefit obligations and employee benefits	(68,535)	(69,424)	(29,311)
Other, net	6,499	3,019	7,903
NET CASH PROVIDED BY OPERATING ACTIVITIES	244,704	386,026	196,442
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(198,312)	(311,052)	(255,027)
Acquisition of businesses	(47,328)	0	(15,905)
Purchases of securities	(3,803)	(4,739)	(4,232)
Sales and maturities of securities	3,813	5,553	6,360
Investments, net of return of capital, in equity method investees	(11,450)	0	88
Other, net	844	5,585	3,397
NET CASH USED IN INVESTING ACTIVITIES	(256,236)	(304,653)	(265,319)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings of long-term debt	978,200	1,324,300	844,500
Repayments of long-term debt	(878,200)	(999,300)	(794,676)
Premium for early redemption of senior notes	0	(10,752)	0
Payment of debt issuance costs	(2,405)	(4,838)	(6,803)
Borrowings and repayments of bank overdraft	0	(88,694)	88,694
Repurchases of common stock	(20,000)	(225,786)	(21,960)
Dividends paid to common shareholders	(81,074)	(79,668)	(72,940)
Cash paid for shares withheld to satisfy employee taxes	(6,588)	(5,042)	(5,249)
Settlements of forward contracts, net	24,013	(2,030)	(8,802)
Other, net	6	1,674	2,282
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	13,952	(90,136)	25,046
EFFECTS OF EXCHANGE RATE CHANGES ON CASH	(1,205)	240	(271)
TOTAL INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND CASH EQUIVALENTS	1,215	(8,523)	(44,102)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	39,775	48,298	92,400
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND CASH EQUIVALENTS AT END OF PERIOD	40,990	39,775	48,298
Cash paid during the period for:
Interest	51,343	50,840	38,267
Income taxes (net of refunds)	71,755	44,949	73,589
SCHEDULE OF NON-CASH INVESTING ACTIVITY:
Accrued capital expenditures included in accounts payable	$ 9,588	$ 27,495	$ 51,492

Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Losses (Gains) on Asset Disposals and Impairments, Net:									$ 5,520	$ (3,532)	$ (1,361)
Equity in income of investees	$ 11,092	$ 14,783	$ 11,319	$ 8,779	$ 7,301	$ 10,618	$ 7,263	$ 8,316	45,973	33,498	27,152
Total Capital Expenditures									198,312	311,052	255,027
Total Depreciation and Amortization									73,842	69,080	60,674
Total Assets	2,618,939				2,501,380				2,618,939	2,501,380	2,293,503
Total Investment in Unconsolidated Affiliates	100,198				85,284				100,198	85,284	71,806
Revenues	624,177	$ 523,711	$ 554,208	$ 530,738	591,975	$ 498,727	$ 505,099	$ 528,273	2,232,834	2,124,074	2,123,516
Government Operations
Segment Reporting Information [Line Items]
Revenues									1,808,483	1,725,097	1,763,127
Commercial Operations
Segment Reporting Information [Line Items]
Revenues									427,358	407,082	371,269
Reportable Segments
Segment Reporting Information [Line Items]
Total Capital Expenditures									191,946	300,622	243,811
Total Depreciation and Amortization									66,787	62,369	53,829
Total Assets	2,504,017				2,407,245				2,504,017	2,407,245	2,183,348
Revenues									2,235,841	2,132,179	2,134,396
Reportable Segments \| Government Operations
Segment Reporting Information [Line Items]
Losses (Gains) on Asset Disposals and Impairments, Net:									(250)	(8)	320
Equity in income of investees									45,973	33,498	27,152
Total Capital Expenditures									103,093	147,051	137,197
Total Depreciation and Amortization									47,982	42,485	35,398
Total Assets	1,498,472				1,430,863				1,498,472	1,430,863	1,353,122
Total Investment in Unconsolidated Affiliates	100,198				85,284				100,198	85,284	71,806
Revenues									1,808,483	1,725,097	1,763,127
Reportable Segments \| Commercial Operations
Segment Reporting Information [Line Items]
Losses (Gains) on Asset Disposals and Impairments, Net:									6,233	(2,548)	(1,681)
Equity in income of investees									0	0	0
Total Capital Expenditures									88,853	153,571	106,614
Total Depreciation and Amortization									18,805	19,884	18,431
Total Assets	1,005,545				976,382				1,005,545	976,382	830,226
Total Investment in Unconsolidated Affiliates	0				0				0	0	0
Revenues									427,358	407,082	371,269
Eliminations
Segment Reporting Information [Line Items]
Losses (Gains) on Asset Disposals and Impairments, Net:									(463)	(976)	0
Revenues									(3,007)	(8,105)	(10,880)
Eliminations \| Government Operations
Segment Reporting Information [Line Items]
Revenues									(2,941)	(7,327)	(10,327)
Eliminations \| Commercial Operations
Segment Reporting Information [Line Items]
Revenues									(66)	(778)	(553)
Corporate
Segment Reporting Information [Line Items]
Total Capital Expenditures									6,366	10,430	11,216
Total Depreciation and Amortization									7,055	6,711	6,845
Total Assets	$ 114,922				$ 94,135				$ 114,922	$ 94,135	$ 110,155

Pension Plans and Postretirement Benefits

12 Months Ended

Dec. 31, 2022

Retirement Benefits [Abstract]

Pension Plans and Postretirement Benefits

PENSION PLANS AND POSTRETIREMENT BENEFITS

We have historically provided defined benefit retirement benefits, primarily through noncontributory pension plans, for most of our regular employees. Certain of our subsidiaries have made other benefits available to certain groups of employees, including postretirement health care and life insurance benefits. For salaried employees, all major U.S. and Canadian defined benefit retirement plans have been closed to new entrants, and benefit accruals have ceased. For hourly employees, certain defined benefit retirement plans have been closed to new entrants.

Our funding policy is to fund the plans as recommended by the respective plan actuaries and in accordance with the Employee Retirement Income Security Act of 1974, as amended, or other applicable law. Assuming we continue as a government contractor, our contractual arrangements with the U.S. Government provide for the recovery of contributions to our pension and other postretirement benefit plans covering employees working primarily in our Government Operations segment.

Obligations and Funded Status


	Pension Benefits Year Ended December 31,				Other Benefits Year Ended December 31,
	2022		2021		2022		2021
	(In thousands)
Change in benefit obligation:
Benefit obligation at beginning of period	$	1,308,266	$	1,414,055	$	59,301	$	61,086
Service cost	11,116		11,667		650		760
Interest cost	30,924		27,170		1,387		1,197
Plan participants' contributions	224		199		346		488
Amendments	3,100		2,314		261		3,402

Settlements	(48,777)		(38,330)		—		—
Actuarial loss (gain)	(307,946)		(45,476)		(14,747)		(4,944)

Foreign currency exchange rate changes	(6,564)		1,669		(921)		197
Benefits paid	(63,365)		(65,002)		(3,227)		(2,885)
Benefit obligation at end of period	$	926,978	$	1,308,266	$	43,050	$	59,301
Change in plan assets:
Fair value of plan assets at beginning of period	$	1,256,799	$	1,281,232	$	53,512	$	52,077
Actual return on plan assets	(263,881)		72,030		(6,003)		2,898
Plan participants' contributions	224		199		346		488
Company contributions	14,172		6,164		1,032		1,008
Settlements	(61,416)		(39,439)		—		—

Foreign currency exchange rate changes	(6,842)		1,615		—		—
Benefits paid	(63,365)		(65,002)		(3,271)		(2,959)
Fair value of plan assets at the end of period	875,691		1,256,799		45,616		53,512
Funded status	$	(51,287)	$	(51,467)	$	2,566	$	(5,789)
Amounts recognized in the balance sheet consist of:
Prepaid postretirement benefit obligation	$	—	$	—	$	22,232	$	20,122
Prepaid pension	9,542		10,573		—		—
Accrued employee benefits	(2,997)		(3,125)		(1,509)		(1,578)
Accumulated postretirement benefit obligation	—		—		(18,157)		(24,333)
Pension liability	(57,832)		(58,915)		—		—
Accrued benefit liability, net	$	(51,287)	$	(51,467)	$	2,566	$	(5,789)
Amount recognized in accumulated comprehensive income (before taxes):
Prior service cost (credit)	$	20,363	$	20,536	$	2,750	$	2,520
Supplemental information:
Plans with accumulated benefit obligation in excess of plan assets:
Projected benefit obligation	$	877,431	$	1,172,881	N/A		N/A
Accumulated benefit obligation	$	873,185	$	1,166,855	$	17,795	$	23,503
Fair value of plan assets	$	816,693	$	1,110,841	$	—	$	—
Plans with plan assets in excess of accumulated benefit obligation:
Projected benefit obligation	$	49,547	$	135,385	N/A		N/A
Accumulated benefit obligation	$	49,547	$	135,375	$	25,255	$	35,798
Fair value of plan assets	$	58,999	$	145,958	$	45,616	$	53,512

We record the service cost component of net periodic benefit cost within Operating income on our consolidated statements of income. For the years ended December 31, 2022, 2021 and 2020, these amounts were $11.8 million, $12.4 million and $11.3 million, respectively. All other components of net periodic benefit cost are included in Other – net on our consolidated statements of income. For the years ended December 31, 2022, 2021 and 2020, these amounts were $(4.0) million, $(92.9) million and $(31.6) million, respectively. Components of net periodic benefit cost included in net income are as follows:


	Pension Benefits Year Ended December 31,						Other Benefits Year Ended December 31,
	2022		2021		2020		2022		2021		2020
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	11,116	$	11,667	$	10,650	$	650	$	760	$	642
Interest cost	30,924		27,170		37,199		1,387		1,197		1,612
Expected return on plan assets	(83,254)		(81,778)		(77,298)		(2,974)		(2,891)		(2,691)
Amortization of prior service cost	3,257		3,097		3,370		26		(178)		(193)
Recognized net actuarial loss (gain)	52,202		(34,690)		6,829		(5,616)		(4,876)		(458)
Net periodic benefit cost (income)	$	14,245	$	(74,534)	$	(19,250)	$	(6,527)	$	(5,988)	$	(1,088)

Net periodic benefit cost related to our pension plans is calculated in accordance with GAAP. In addition, we calculate pension costs in accordance with U.S. cost accounting standards ("CAS") for purposes of cost recovery on our U.S. Government contracts to the extent applicable. See further discussion of CAS pension costs under the heading "Critical Accounting Estimates" in Item 7 of this Annual Report on Form 10-K.

Recognized net actuarial losses (gains) consist primarily of our reported actuarial losses (gains), settlements, and the differences between the actual returns on plan assets and the expected returns on plan assets. The benefit obligation of our pension plans as of December 31, 2022 and 2021 increased (decreased) by $(295.1) million and $(43.0) million, respectively, due to changes in the discount rate.

In November 2022, we completed the wind-up of our foreign salaried pension benefit plan and settled approximately $48.8 million in benefit obligations. As a result, we recognized pension settlement-related charges of $12.6 million during the year ended December 31, 2022. In December 2021, we purchased a group annuity contract that transferred certain foreign hourly pension benefit obligations of approximately $38.3 million to an insurance company for approximately 400 retirees.

Additional Information


	Pension Benefits Year Ended December 31,				Other Benefits Year Ended December 31,
	2022		2021		2022		2021
	(In thousands)
Decrease in accumulated other comprehensive income due to actuarial losses – before taxes	$	(3,100)	$	(2,314)	$	(261)	$	(3,402)

In the current fiscal year, we have recognized expense (income) in other comprehensive income as a component of net periodic benefit cost of approximately $3.3 million and $0.0 million for our pension benefits and other benefits, respectively.

Assumptions


	Pension Benefits				Other Benefits
	2022		2021		2022		2021
Weighted-average assumptions used to determine net periodic benefit obligations at December 31:
Discount rate	5.42	%	2.91	%	5.32	%	2.85	%


	Pension Benefits						Other Benefits
	2022		2021		2020		2022		2021		2020
Weighted-average assumptions used to determine net periodic benefit cost for the years ended December 31:
Discount rate to determine interest cost	2.42	%	1.96	%	2.78	%	2.42	%	1.87	%	2.62	%
Expected return on plan assets	7.10	%	6.80	%	6.95	%	5.67	%	5.66	%	5.66	%

The expected return on plan assets rate assumptions are based on the long-term expected returns for the investment mix of assets in the portfolio. In setting these rates, we use a building-block approach. Historical real return trends for the various asset classes in the plan's portfolio are combined with anticipated future market conditions to estimate the real rate of return for each asset class. These rates are then adjusted for anticipated future inflation to estimate nominal rates of return for each asset class. The expected rate of return on plan assets is then determined to be the weighted-average nominal return based on the weightings of the asset classes within the total asset portfolio.

Our existing other benefit plans are unfunded, with the exception of the NFS postretirement benefit plans. These plans provide health benefits to certain salaried and hourly employees, as well as retired employees, of NFS. All of the assets for these postretirement benefit plans are contributed into a Voluntary Employees' Beneficiary Association trust.


	2022		2021
Assumed health care cost trend rates at December 31:
Health care cost trend rate assumed for next year	7.25	%	7.50	%
Rates to which the cost trend rate is assumed to decline (ultimate trend rate)	4.50	%	4.50	%
Year that the rate reaches ultimate trend rate	2034		2034

Investment Goals

General

The overall investment strategy of the pension trusts is to achieve long-term growth of principal, while avoiding excessive risk and to minimize the probability of loss of principal over the long term. The specific investment goals that have been set for the pension trusts, in the aggregate, are (1) to ensure that plan liabilities are met when due and (2) to achieve an investment return on trust assets consistent with a reasonable level of risk.

Allocations to each asset class for both domestic and foreign plans are reviewed periodically and rebalanced, if appropriate, to assure the continued relevance of the goals, objectives and strategies. The pension trusts for both our domestic and foreign plans employ a professional investment advisor and a number of professional investment managers whose individual benchmarks are, in the aggregate, consistent with the plan's overall investment objectives.

The goals of each investment manager are (1) to meet (in the case of passive accounts) or exceed (for actively managed accounts) the benchmark selected and agreed upon by the manager and the pension trust and (2) to display an overall level of risk in its portfolio that is consistent with the risk associated with the agreed upon benchmark.

The investment performance of total portfolios, as well as asset class components, is periodically measured against commonly accepted benchmarks, including the individual investment manager benchmarks. In evaluating investment manager performance, consideration is also given to personnel, strategy, research capabilities, organizational and business matters, adherence to discipline and other qualitative factors that may impact the ability to achieve desired investment results.

Domestic Plans

We sponsor the following domestic defined benefit pension plans:

•BWXT Retirement Plan;

•Nuclear Fuel Services, Inc. Retirement Plan for Salaried Employees; and

•Nuclear Fuel Services, Inc. Retirement Plan for Hourly Employees.

The assets of the domestic pension plans are commingled for investment purposes and held by the trustee in the BWXT Master Trust (the "Master Trust"). For the years ended December 31, 2022 and 2021, the investment returns on domestic plan assets of the Master Trust (net of deductions for management fees) were approximately (22)% and 9%, respectively.

The following is a summary of the asset allocations for the Master Trust at December 31, 2022 and 2021 by asset category:


	December 31,
	2022		2021
Asset Category:
U.S. Government Securities	36	%	32	%
Commingled and Mutual Funds	25	%	29	%
Real Estate	16	%	11	%
Diversified Credit	13	%	11	%
Fixed Income (excluding U.S. Government Securities)	5	%	11	%
Partnerships with Security Holdings	3	%	4	%
Other	2	%	2	%
Total	100	%	100	%

The target allocation for 2023 for the domestic plans, by asset class, is as follows:


Asset Class:
Fixed Income	45	%
Equities	28	%
Other	27	%

Foreign Plan

We sponsor the BWXT Canada Ltd. Bargaining Unit Employees' Pension Plan. We also sponsored the BWXT Canada Ltd. Salaried Non-Union Employees' Retirement Plan until its wind-up in November 2022. The following is a summary of the asset allocations of these plans at December 31, 2022 and 2021 by asset category:


	December 31,
	2022		2021
Asset Category:
Fixed Income	51	%	20	%
Commingled and Mutual Funds	29	%	11	%
Cash and Other	20	%	69	%
Total	100	%	100	%

The target allocation for 2023 for the Canadian plan, by asset class, is as follows:


Asset Class:
Fixed Income	65	%
Equities	35	%

Fair Value

See Note 14 for a detailed description of fair value measurements and the hierarchy established for valuation inputs. The following is a summary of total assets for our plans measured at fair value at December 31, 2022:


	12/31/2022		Level 1		Level 2		Level 3		Unclassified
	(In thousands)
Pension and Other Benefits:
U.S. Government Securities	$	305,995	$	305,995	$	—	$	—	$	—
Commingled and Mutual Funds	230,674		42,180		—		—		188,494
Real Estate	132,867		—		—		—		132,867
Diversified Credit	108,363		—		—		—		108,363
Fixed Income	95,967		35,563		—		—		60,404
Partnerships with Security Holdings	25,259		—		—		—		25,259
Cash, Cash Equivalents and Accrued Items (1)	22,182		—		—		—		22,182
Total Assets	$	921,307	$	383,738	$	—	$	—	$	537,569

(1)Includes items that are not required to be categorized in the fair value hierarchy in order to permit reconciliation of the fair value hierarchy to the fair value of plan assets presented in the Obligations and Funded Status table.

The following is a summary of total assets for our plans measured at fair value at December 31, 2021:


	12/31/2021		Level 1		Level 2		Level 3		Unclassified
	(In thousands)
Pension and Other Benefits:
U.S. Government Securities	$	369,980	$	365,295	$	4,685	$	—	$	—
Commingled and Mutual Funds	358,423		77,680		—		—		280,743
Fixed Income	182,169		31,856		128,829		—		21,484
Diversified Credit	133,508		—		—		—		133,508
Real Estate	126,886		—		—		—		126,886
Investment Contract (1)	46,817		—		—		46,817		—
Partnerships with Security Holdings	46,515		—		—		—		46,515
Cash, Cash Equivalents and Accrued Items (2)	46,013		—		—		—		46,013
Total Assets	$	1,310,311	$	474,831	$	133,514	$	46,817	$	655,149

(1)During 2021, we filed for regulatory approval for the wind-up of our foreign salaried pension benefit plan. Based on those participants who elected to receive annuities upon retirement, we purchased a group annuity contract totaling $45.6 million. The wind-up of this plan was completed in 2022.

(2)Includes items that are not required to be categorized in the fair value hierarchy in order to permit reconciliation of the fair value hierarchy to the fair value of plan assets presented in the Obligations and Funded Status table.

The following is a summary of the changes in the Plans' Level 3 instruments for the years ended December 31, 2022 and 2021:


	Year Ended December 31,
	2022		2021
	(In thousands)
Balance at beginning of period	$	46,817	$	—
Purchases	—		45,645
Dispositions	(35,822)		—
Realized gain (loss)	(6,988)		—
Change in unrealized gain (loss)	(652)		652
Translation	(3,355)		520
Balance at end of period	$	—	$	46,817

Cash Flows


	Domestic Plans				Foreign Plans
	Pension Benefits		Other Benefits		Pension Benefits		Other Benefits
	(In thousands)
Expected employer contributions to trusts of defined benefit plans:
2023	$	—	$	—	$	2,333	N/A
Expected benefit payments:
2023	$	62,828	$	2,660	$	758	$	544
2024	$	64,396	$	2,654	$	892	$	581
2025	$	65,493	$	2,601	$	1,026	$	626
2026	$	66,355	$	2,527	$	1,157	$	684
2027	$	66,992	$	2,468	$	1,286	$	720
2028-2032	$	333,481	$	11,398	$	7,706	$	3,784

Defined Contribution Plans

We also provide benefits under the BWXT Thrift Plan (the "Thrift Plan"). The Thrift Plan generally provides for matching employer contributions of 50% of the first 6% of compensation, as defined in the Thrift Plan, contributed by participants, and fully vest and are nonforfeitable after three years of service or upon retirement, death, lay-off or approved disability. These matching employer contributions are made in cash and invested at the employees' discretion. We also provide service-based cash contributions under the Thrift Plan to employees not accruing benefits under our defined benefit plans. Our Canadian plans also include a defined contribution component whereby we make cash, service-based contributions. Amounts charged to expense for employer contributions under our defined contribution plans totaled approximately $37.6 million, $37.5 million and $35.8 million in the years ended December 31, 2022, 2021 and 2020, respectively.

- Definition

The entire disclosure for retirement benefits.

+ References

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+ Details

Financial Instruments with Concentrations of Credit Risk - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Allowance for doubtful accounts receivable	$ 0.2	$ 0.2
Government Contracts Concentration Risk \| Sales Revenue, Net \| U.S. Government
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Concentration risk percentage	76.00%	76.00%	77.00%
Customer Concentration Risk \| Sales Revenue, Net \| Utility Customers
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Concentration risk percentage	14.00%	14.00%	13.00%
Customer Concentration Risk \| Accounts Receivable \| U.S. Government
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Concentration risk percentage	68.00%	68.00%
Customer Concentration Risk \| Accounts Receivable \| Utility Customers
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Concentration risk percentage	15.00%	18.00%

Quarterly Financial Data - Selected Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 624,177	$ 523,711	$ 554,208	$ 530,738	$ 591,975	$ 498,727	$ 505,099	$ 528,273	$ 2,232,834	$ 2,124,074	$ 2,123,516
Operating income	101,883	79,878	95,237	71,573	102,215	87,468	73,751	82,414	348,571	345,848	358,552
Equity in income of investees	11,092	14,783	11,319	8,779	7,301	10,618	7,263	8,316	45,973	33,498	27,152
Net Income Attributable to BWX Technologies, Inc.	$ 42,965	$ 61,603	$ 74,613	$ 59,010	$ 116,861	$ 59,914	$ 59,347	$ 69,749	$ 238,191	$ 305,871	$ 278,670
Basic:
Net income attributable to BWX Technologies, Inc. (USD per share)	$ 0.47	$ 0.67	$ 0.82	$ 0.64	$ 1.27	$ 0.64	$ 0.62	$ 0.73	$ 2.60	$ 3.24	$ 2.92
Diluted:
Net income attributable to BWX Technologies, Inc. (USD per share)	$ 0.47	$ 0.67	$ 0.82	$ 0.64	$ 1.26	$ 0.63	$ 0.62	$ 0.73	$ 2.60	$ 3.24	$ 2.91

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 32
-Subparagraph (a)
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 4
-Subparagraph (a)
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 22
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 22
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
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-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Revenue Recognition - Revenue Remaining Performance Obligation (Details) $ in Millions	Dec. 31, 2022 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 4,144.3
Government
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 88.7

Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Components of Long-Term Debt

Our Long-Term Debt consists of the following:


	December 31,
	2022		2021
	(In thousands)
Debt Instruments:
Senior Notes	$	800,000	$	800,000
Credit Facility	500,000		—
Former Credit Facility	—		400,000
Less: Amounts due within one year	6,250		—
Long-Term Debt, gross	1,293,750		1,200,000
Less: Deferred debt issuance costs	11,126		10,696
Long-Term Debt	$	1,282,624	$	1,189,304

Pension Plans and Postretirement Benefits - Plan Asset Allocations by Asset Category (Detail)	Dec. 31, 2022	Dec. 31, 2021
UNITED STATES \| Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Total	100.00%	100.00%
UNITED STATES \| Pension Plan \| U.S. Government Securities
Defined Benefit Plan Disclosure [Line Items]
Total	36.00%	32.00%
UNITED STATES \| Pension Plan \| Commingled and Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Total	25.00%	29.00%
UNITED STATES \| Pension Plan \| Real Estate
Defined Benefit Plan Disclosure [Line Items]
Total	16.00%	11.00%
UNITED STATES \| Pension Plan \| Diversified Credit
Defined Benefit Plan Disclosure [Line Items]
Total	13.00%	11.00%
UNITED STATES \| Pension Plan \| Fixed Income (excluding U.S. Government Securities)
Defined Benefit Plan Disclosure [Line Items]
Total	5.00%	11.00%
UNITED STATES \| Pension Plan \| Partnerships with Security Holdings
Defined Benefit Plan Disclosure [Line Items]
Total	3.00%	4.00%
UNITED STATES \| Pension Plan \| Other
Defined Benefit Plan Disclosure [Line Items]
Total	2.00%	2.00%
Canada \| Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Total	100.00%	100.00%
Canada \| Other Benefits \| Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Total	51.00%	20.00%
Canada \| Other Benefits \| Equity Securities and Commingled Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Total	29.00%	11.00%
Canada \| Other Benefits \| Other
Defined Benefit Plan Disclosure [Line Items]
Total	20.00%	69.00%

Pension Plans and Postretirement Benefits - Plans' Level 3 Instruments Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Balance at beginning of period	$ 1,310,311
Balance at end of period	921,307	$ 1,310,311
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Balance at beginning of period	46,817	0
Purchases	0	45,645
Dispositions	(35,822)	0
Realized gain (loss)	(6,988)	0
Change in unrealized gain (loss)	(652)	652
Translation	(3,355)	520
Balance at end of period	$ 0	$ 46,817

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References + Details

Pension Plans and Postretirement Benefits - Summary of Total Investments Measured at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Separate Account Investment [Line Items]
Total Assets	$ 921,307	$ 1,310,311
Unclassified	537,569	655,149
U.S. Government Securities
Fair Value, Separate Account Investment [Line Items]
Total Assets	305,995	369,980
Unclassified	0	0
Commingled and Mutual Funds
Fair Value, Separate Account Investment [Line Items]
Total Assets	230,674	358,423
Unclassified	188,494	280,743
Real Estate
Fair Value, Separate Account Investment [Line Items]
Total Assets	132,867	126,886
Unclassified	132,867	126,886
Diversified Credit
Fair Value, Separate Account Investment [Line Items]
Total Assets	108,363	133,508
Unclassified	108,363	133,508
Fixed Income
Fair Value, Separate Account Investment [Line Items]
Total Assets	95,967	182,169
Unclassified	60,404	21,484
Partnerships with Security Holdings
Fair Value, Separate Account Investment [Line Items]
Total Assets	25,259	46,515
Unclassified	25,259	46,515
Cash, Cash Equivalents and Accrued Items (1)
Fair Value, Separate Account Investment [Line Items]
Total Assets	22,182	46,013
Unclassified	22,182	46,013
Investment Contracts
Fair Value, Separate Account Investment [Line Items]
Total Assets		46,817
Unclassified		0
Level 1
Fair Value, Separate Account Investment [Line Items]
Total Assets	383,738	474,831
Level 1 \| U.S. Government Securities
Fair Value, Separate Account Investment [Line Items]
Total Assets	305,995	365,295
Level 1 \| Commingled and Mutual Funds
Fair Value, Separate Account Investment [Line Items]
Total Assets	42,180	77,680
Level 1 \| Real Estate
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 1 \| Diversified Credit
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 1 \| Fixed Income
Fair Value, Separate Account Investment [Line Items]
Total Assets	35,563	31,856
Level 1 \| Partnerships with Security Holdings
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 1 \| Cash, Cash Equivalents and Accrued Items (1)
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 1 \| Investment Contracts
Fair Value, Separate Account Investment [Line Items]
Total Assets		0
Level 2
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	133,514
Level 2 \| U.S. Government Securities
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	4,685
Level 2 \| Commingled and Mutual Funds
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 2 \| Real Estate
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 2 \| Diversified Credit
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 2 \| Fixed Income
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	128,829
Level 2 \| Partnerships with Security Holdings
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 2 \| Cash, Cash Equivalents and Accrued Items (1)
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 2 \| Investment Contracts
Fair Value, Separate Account Investment [Line Items]
Total Assets		0
Level 3
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	46,817	$ 0
Level 3 \| U.S. Government Securities
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 3 \| Commingled and Mutual Funds
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 3 \| Real Estate
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 3 \| Diversified Credit
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 3 \| Fixed Income
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 3 \| Partnerships with Security Holdings
Fair Value, Separate Account Investment [Line Items]
Total Assets	0	0
Level 3 \| Cash, Cash Equivalents and Accrued Items (1)
Fair Value, Separate Account Investment [Line Items]
Total Assets	$ 0	0
Level 3 \| Investment Contracts
Fair Value, Separate Account Investment [Line Items]
Total Assets		$ 46,817

Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Summarized Activity of Stock Options

The following table summarizes activity for our stock options for the year ended December 31, 2022 (share data in thousands):


	Number of Shares	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (In millions)
Outstanding at beginning of period	125	$	23.65
Granted	—	N/A
Exercised	(35)	$	23.71
Cancelled/expired/forfeited	—	N/A
Outstanding at end of period	90	$	23.62	2.0 years	$	3.1
Exercisable at end of period	90	$	23.62	2.0 years	$	3.1

Schedule of Restricted Stock Units

Nonvested performance shares as of December 31, 2022 and changes during the year ended December 31, 2022 were as follows (share data in thousands):


	Number of Shares	Weighted- Average Grant Date Fair Value
Nonvested at beginning of period	545	$	55.90
Adjustment to assumed vesting percentage	18	$	47.90
Granted	202	$	45.62
Vested	(176)	$	51.80
Cancelled/forfeited	(79)	$	53.79
Nonvested at end of period	510	$	53.01

Restricted Stock Units

Nonvested restricted stock units as of December 31, 2022 and changes during the year ended December 31, 2022 were as follows (share data in thousands):


	Number of Shares	Weighted- Average Grant Date Fair Value
Nonvested at beginning of period	221	$	57.66
Granted	191	$	46.33
Vested	(124)	$	55.49
Cancelled/forfeited	(46)	$	52.59
Nonvested at end of period	242	$	50.79

Schedule of Summarized Activity of Stock Appreciation

The following table summarizes activity for our stock appreciation rights for the year ended December 31, 2022 (unit data in thousands):


	Number of Units	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (In millions)
Outstanding at beginning of period	27	$	23.62
Granted	—	N/A
Exercised	(10)	$	23.62
Cancelled/expired/forfeited	—	N/A
Outstanding at end of period	17	$	23.62	2.2 years	$	0.6
Exercisable at end of period	17	$	23.62	2.2 years	$	0.6

Income Taxes - Valuation Allowance for Deferred Tax Assets (Detail) - Valuation Allowance of Deferred Tax Assets - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ (13,218)	$ (12,892)	$ (13,578)
Charges To Costs and Expenses	196	(326)	771
Charged To Other Accounts	0	0	(85)
Ending Balance	$ (13,022)	$ (13,218)	$ (12,892)

Long-Term Debt - Components of Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Less: Amounts due within one year	$ 6,250	$ 0
Long-Term Debt, gross	1,293,750	1,200,000
Less: Deferred debt issuance costs	11,126	10,696	$ 12,269	$ 8,006
Long-Term Debt	1,282,624	1,189,304
Senior Notes \| Secured Debt
Debt Instrument [Line Items]
Long-term debt including current maturities	800,000	800,000
Credit Facility \| Secured Debt
Debt Instrument [Line Items]
Long-term debt including current maturities	500,000	0
Former Credit Facility \| Secured Debt
Debt Instrument [Line Items]
Long-term debt including current maturities	$ 0	$ 400,000

Acquisitions and Divestitures (Tables)

12 Months Ended

Dec. 31, 2022

Business Combination and Asset Acquisition [Abstract]

Schedule of Intangible Assets Acquired

The intangible assets included above consist of the following (dollar amounts in thousands):


	Amount		Amortization Period
Customer relationships	$	17,700	21 years
Backlog	$	6,600	5 years
Unpatented technology	$	4,200	8 years

Pension Plans and Postretirement Benefits - Summary of Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Pension Plan
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Decrease in accumulated other comprehensive income due to actuarial losses – before taxes	$ (3,100)	$ (2,314)
Other Benefits
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Decrease in accumulated other comprehensive income due to actuarial losses – before taxes	$ (261)	$ (3,402)

Basis of Presentation and Significant Accounting Policies - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ 624,177	$ 523,711	$ 554,208	$ 530,738	$ 591,975	$ 498,727	$ 505,099	$ 528,273	$ 2,232,834	$ 2,124,074	$ 2,123,516
Cost of operations									(1,680,899)	(1,573,797)	(1,548,119)
Total before tax									314,377	395,713	362,172
Other – net									1,458	85,207	34,116
Provision for Income Taxes									(75,757)	(89,425)	(82,976)
Net income									238,620	306,288	279,196
Accumulated Other Comprehensive Income Component Recognized
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income									(3,158)	(2,597)	(2,045)
Accumulated Other Comprehensive Income Component Recognized \| Realized (loss) gain on derivative financial instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues									(370)	307	(35)
Cost of operations									(343)	(712)	695
Total before tax									(713)	(405)	660
Provision for Income Taxes									181	103	(173)
Net income									(532)	(302)	487
Accumulated Other Comprehensive Income Component Recognized \| Amortization of prior service cost on benefit obligations
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other – net									(3,283)	(2,919)	(3,177)
Provision for Income Taxes									657	624	645
Net income									$ (2,626)	$ (2,295)	$ (2,532)

Acquisitions and Divestitures

12 Months Ended

Dec. 31, 2022

Business Combination and Asset Acquisition [Abstract]

Acquisitions and Divestitures

ACQUISITIONS AND DIVESTITURES

Acquisition of Dynamic Controls Limited and Citadel Capital Corporation

On April 11, 2022, our subsidiary BWXT Government Group, Inc. acquired all of the outstanding stock of U.K.-based Dynamic Controls Limited ("Dynamic") and U.S.-based Citadel Capital Corporation, along with its wholly-owned subsidiary, Cunico Corporation ("Cunico"), for approximately $49.9 million. Our preliminary purchase price allocation resulted in the recognition of $28.5 million of Intangible Assets, $6.4 million of inventory and $16.6 million of Goodwill. Adjustments to our initial purchase price allocation include a reduction to intangible assets of $1.1 million with an offsetting increase to goodwill and a reduction of inventory of $2.0 million with an offsetting increase to Contracts in progress. In addition, we recognized right-of-use assets and lease liabilities of $7.2 million. The assets acquired and liabilities assumed have been recorded at preliminary estimates of fair value as determined by management, based on information currently available and on current assumptions of future operations, and are subject to change upon completion of acquisition accounting. Dynamic and Cunico are suppliers of highly-engineered, proprietary valves, manifolds and fittings for global naval nuclear and diesel-electric submarines, surface warfare ships and commercial shipping vessels. These companies are reported as part of our Government Operations segment.

The intangible assets included above consist of the following (dollar amounts in thousands):


	Amount		Amortization Period
Customer relationships	$	17,700	21 years
Backlog	$	6,600	5 years
Unpatented technology	$	4,200	8 years

Acquisition of Laker Energy Products Ltd.

On January 2, 2020, our subsidiary BWXT Canada Ltd. acquired Laker Energy Products Ltd., which was renamed BWXT Precision Manufacturing Inc. ("Precision Manufacturing"), for CAD 23.3 million ($17.8 million U.S. dollar equivalent). We were subject to the payment of contingent consideration of which we had recognized CAD 2.5 million as a component of the purchase price. Our purchase price allocation resulted in the recognition of $8.4 million of Property, Plant and Equipment, Net, $8.2 million of Intangible Assets and $5.8 million of Goodwill. In addition, we recognized right-of-use assets and lease liabilities of $2.7 million. During the year ended December 31, 2021, we entered into an agreement with the seller resulting in no contingent consideration due and recognized a gain of $2.0 million (CAD 2.5 million) as a component of Cost of operations. Precision Manufacturing is a global supplier of nuclear-grade materials and precisely machined components for CANDU nuclear power utilities and is reported as part of our Commercial Operations segment.

Divestiture of U.S.-Based Commercial Nuclear Services Business

On May 29, 2020, our subsidiary BWXT Nuclear Energy, Inc. divested its U.S.-based commercial nuclear services business, a component of our Government Operations segment. In a cashless transaction, we exchanged net assets totaling $18.0 million, consisting primarily of property, plant and equipment and certain warranty obligations, for a manufacturing facility and the associated land of approximately the same value. The acquired assets are reported as part of the Government Operations segment.

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Derivative financial instruments, unrealized (losses) gains, tax benefit (provision)	$ 89	$ (170)	$ (24)
Derivative financial instruments, reclassification adjustment, unrealized tax provision (benefit)	181	103	(173)
Benefit obligations, unrecognized losses, tax benefit	802	1,301	513
Benefit obligations, recognition of plan costs, tax benefit	(657)	(624)	(645)
Investments, unrealized (losses) gains, tax provision	$ 28	$ (24)	$ (56)

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Summary of Investments and Available-for-Sale Securities Measured at Fair Value

The following is a summary of our investments measured at fair value at December 31, 2022:


	12/31/2022		Level 1		Level 2		Level 3		Unclassified
	(In thousands)
Equity securities

Mutual funds	$	6,341	$	—	$	6,341	$	—	$	—
Available-for-sale securities
U.S. Government and agency securities	3,253		3,253		—		—		—
Corporate bonds	2,265		1,714		551		—		—
Asset-backed securities and collateralized mortgage obligations	42		—		42		—		—
Total	$	11,901	$	4,967	$	6,934	$	—	$	—

The following is a summary of our investments measured at fair value at December 31, 2021:


	12/31/2021		Level 1		Level 2		Level 3		Unclassified
	(In thousands)
Equity securities

Mutual funds	$	7,650	$	—	$	7,650	$	—	$	—
Available-for-sale securities
U.S. Government and agency securities	2,738		2,738		—		—		—
Corporate bonds	2,926		1,852		1,074		—		—
Asset-backed securities and collateralized mortgage obligations	55		—		55		—		—
Total	$	13,369	$	4,590	$	8,779	$	—	$	—

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 35,244	$ 33,891
Restricted cash and cash equivalents	2,928	2,896
Investments	3,804	3,811
Accounts receivable – trade, net	60,782	70,663
Accounts receivable – other	26,894	16,651
Retainages	48,566	51,507
Contracts in progress	538,365	546,595
Other current assets	55,036	47,718
Total Current Assets	771,619	773,732
Property, Plant and Equipment, Net	1,134,897	1,045,640
Investments	8,097	9,558
Goodwill	293,165	285,502
Deferred Income Taxes	20,585	21,394
Investments in Unconsolidated Affiliates	100,198	85,284
Intangible Assets	193,612	185,551
Other Assets	96,766	94,719
TOTAL	2,618,939	2,501,380
Current Liabilities:
Current maturities of long-term debt	6,250	0
Accounts payable	127,112	189,842
Accrued employee benefits	61,079	71,835
Accrued liabilities – other	84,693	86,319
Advance billings on contracts	88,726	111,619
Total Current Liabilities	367,860	459,615
Long-Term Debt	1,282,624	1,189,304
Accumulated Postretirement Benefit Obligation	18,157	24,333
Environmental Liabilities	90,989	92,642
Pension Liability	57,832	59,388
Other Liabilities	53,122	38,863
Commitments and Contingencies (Note 10)
Stockholders' Equity:
Common stock, par value $0.01 per share, authorized 325,000,000 shares; issued 127,671,756 and 127,311,985 shares at December 31, 2022 and 2021, respectively	1,277	1,273
Preferred stock, par value $0.01 per share, authorized 75,000,000 shares; no shares issued	0	0
Capital in excess of par value	189,263	174,288
Retained earnings	1,932,970	1,775,751
Treasury stock at cost, 36,417,480 and 35,915,747 shares at December 31, 2022 and 2021, respectively	(1,353,270)	(1,326,280)
Accumulated other comprehensive income (loss)	(21,930)	12,143
Stockholders' Equity – BWX Technologies, Inc.	748,310	637,175
Noncontrolling interest	45	60
Total Stockholders' Equity	748,355	637,235
TOTAL	$ 2,618,939	$ 2,501,380

Segment Reporting - Schedule of Revenue Information from Products and Service Lines (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from External Customer [Line Items]
Revenues	$ 624,177	$ 523,711	$ 554,208	$ 530,738	$ 591,975	$ 498,727	$ 505,099	$ 528,273	$ 2,232,834	$ 2,124,074	$ 2,123,516
Government Operations
Revenue from External Customer [Line Items]
Revenues									1,808,483	1,725,097	1,763,127
Commercial Operations
Revenue from External Customer [Line Items]
Revenues									427,358	407,082	371,269
Reportable Segments
Revenue from External Customer [Line Items]
Revenues									2,235,841	2,132,179	2,134,396
Reportable Segments \| Government Operations
Revenue from External Customer [Line Items]
Revenues									1,808,483	1,725,097	1,763,127
Reportable Segments \| Government Operations \| Nuclear Components and Fuel
Revenue from External Customer [Line Items]
Revenues									1,494,810	1,481,416	1,512,980
Reportable Segments \| Government Operations \| Downblending and Nuclear Services
Revenue from External Customer [Line Items]
Revenues									233,197	198,420	207,221
Reportable Segments \| Government Operations \| Advanced Reactor Design and Engineering
Revenue from External Customer [Line Items]
Revenues									80,476	45,261	42,926
Reportable Segments \| Commercial Operations
Revenue from External Customer [Line Items]
Revenues									427,358	407,082	371,269
Reportable Segments \| Commercial Operations \| Nuclear Manufacturing
Revenue from External Customer [Line Items]
Revenues									221,458	246,444	250,585
Reportable Segments \| Commercial Operations \| Nuclear Services and Engineering
Revenue from External Customer [Line Items]
Revenues									205,900	160,638	120,684
Other
Revenue from External Customer [Line Items]
Revenues									$ (3,007)	$ (8,105)	$ (10,880)

Financial Instruments with Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2022
Risks and Uncertainties [Abstract]
Financial Instruments with Concentrations of Credit Risk	FINANCIAL INSTRUMENTS WITH CONCENTRATIONS OF CREDIT RISK The primary customer of our Government Operations segment is the U.S. Government, including some of its contractors. Our Commercial Operations segment's major customers are large utilities. These concentrations of customers may impact our overall exposure to credit risk, either positively or negatively, in that our customers may be similarly affected by changes in economic or other conditions. In the years ended December 31, 2022, 2021 and 2020, U.S. Government contracts accounted for approximately 76%, 76% and 77% of our total consolidated revenues, respectively. Accounts receivable due directly or indirectly from the U.S. Government represented 68% and 68% of net receivables at December 31, 2022 and 2021, respectively. In the years ended December 31, 2022, 2021 and 2020, revenues from large utility customers accounted for approximately 14%, 14% and 13% of our total consolidated revenues, respectively. Accounts receivable due directly from large utility customers represented 15% and 18% of net receivables at December 31, 2022 and 2021, respectively. See Note 15 for additional information about our major customers. We believe that our provision for possible losses on uncollectable accounts receivable is adequate for our credit loss exposure. At December 31, 2022 and 2021, the allowances for possible losses that we deducted from Accounts receivable – trade, net on our consolidated balance sheets were $0.2 million.

Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Thousands		12 Months Ended
	May 29, 2020 USD ($)	Dec. 31, 2022 USD ($) segment component facility	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)
Basis Of Presentation And Significant Accounting Policies [Line Items]
Number of reportable segments \| segment		2	3
Number of large, heavy components supplied to worldwide (more than) \| component		1,300
Research and development activities		$ 45,400	$ 31,400	$ 40,800
Research and development activities, paid by customers		35,900	20,300	26,600
Interest expense		53,900	51,100	40,800
Interest costs capitalized		17,500	15,300	9,800
Restricted cash and cash equivalents reclassified into other assets		5,700
Restricted cash and cash equivalents		2,928	2,896
Total inventories		22,900	16,300
Depreciation		61,300	58,100	50,300
Lease expense		8,600	8,400	7,700
Cash payments for leases		$ 6,600
Weighted average remaining lease term		13 years 10 months 24 days
Weighted average discount rate		4.72%
Asset retirement costs, estimated maximum duration		40 years
Number of facilities with U.S. Government decommissioning costs obligation \| facility		2
Reserves for self-insurance		$ 4,200	4,500
Net foreign currency transaction gains (losses)		(1,400)	1,800	(600)
Net gains deferred on derivative financial instruments in accumulated other comprehensive income (loss)		100
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments		(27,100)	(100)	8,700
Notional amount of foreign currency forward contracts		438,800
Favorable operating lease
Basis Of Presentation And Significant Accounting Policies [Line Items]
Amortization		1,600
Nuclear Services Business
Basis Of Presentation And Significant Accounting Policies [Line Items]
Net assets exchanged in noncash transaction	$ 18,000
Accounts Receivable
Basis Of Presentation And Significant Accounting Policies [Line Items]
Canada Emergency Wage Subsidy (CEWS) grant		$ 600	$ 5,400	$ 20,400
Minimum
Basis Of Presentation And Significant Accounting Policies [Line Items]
Operating lease contract term (in years)		1 year
Operating lease renewal contract term (in years)		1 year
Minimum \| Machinery and equipment
Basis Of Presentation And Significant Accounting Policies [Line Items]
Useful life (in years)		3 years
Minimum \| Property, Plant and Equipment
Basis Of Presentation And Significant Accounting Policies [Line Items]
Useful life (in years)		8 years
Maximum
Basis Of Presentation And Significant Accounting Policies [Line Items]
Operating lease contract term (in years)		20 years
Operating lease renewal contract term (in years)		10 years
Maximum \| Machinery and equipment
Basis Of Presentation And Significant Accounting Policies [Line Items]
Useful life (in years)		14 years
Maximum \| Property, Plant and Equipment
Basis Of Presentation And Significant Accounting Policies [Line Items]
Useful life (in years)		40 years
Cash Held For Decommissioning Of Facilities
Basis Of Presentation And Significant Accounting Policies [Line Items]
Restricted cash and cash equivalents		$ 2,800
Cash Held To Meet Reinsurance Reserve Requirements
Basis Of Presentation And Significant Accounting Policies [Line Items]
Restricted cash and cash equivalents		$ 2,900

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared (usd per share)	$ 0.88	$ 0.84	$ 0.76

Basis of Presentation and Significant Accounting Policies - Changes in Carrying Amount of Other Non-Current Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred Finance Costs [Roll Forward]
Balance at beginning of period	$ 10,696	$ 12,269	$ 8,006
Additions	2,405	4,838	6,803
Interest expense	(1,975)	(6,411)	(2,540)
Balance at end of period	11,126	10,696	12,269
Amortization of Debt Issuance Costs	$ (46)	(4,212)	(665)
Former Credit Facility
Deferred Finance Costs [Roll Forward]
Amortization of Debt Issuance Costs		$ (4,200)	$ (700)

Cover - USD ($) $ in Billions	12 Months Ended
Cover - USD ($) $ in Billions	Dec. 31, 2022	Feb. 21, 2023	Jun. 30, 2022
Cover [Abstract]
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-34658
Entity Registrant Name	BWX TECHNOLOGIES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	80-0558025
Entity Address, Address Line One	800 Main Street, 4th Floor
Entity Address, City or Town	Lynchburg,
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	24504
City Area Code	980
Local Phone Number	365-4300
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	BWXT
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 5.0
Entity Common Stock, Shares Outstanding		91,282,718
Documents Incorporated by Reference	Portions of the registrant's definitive proxy statement for the 2023 Annual Meeting of Stockholders to be held on May 3, 2023 are incorporated by reference into Part III of this Form 10-K.
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Central Index Key	0001486957
Document Type	10-K

Acquisitions and Divestitures - Schedule of Intangible Assets Acquired (Details) - Dynamic Controls Limited and Citadel Capital Corporation $ in Thousands	Apr. 11, 2022 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 28,500
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 17,700
Amortization Period	21 years
Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 6,600
Amortization Period	5 years
Unpatented technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 4,200
Amortization Period	8 years

Segment Reporting - Schedule of Property, Plant and Equipment, Net by Geographical Area (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net	$ 1,134,897	$ 1,045,640	$ 816,471
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net	743,767	698,772	603,518
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net	389,490	346,868	212,953
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net	$ 1,640	$ 0	$ 0

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenues	$ 2,232,834	$ 2,124,074	$ 2,123,516
Costs and Expenses:
Cost of operations	1,680,899	1,573,797	1,548,119
Research and development costs	9,535	11,059	14,189
Losses (gains) on asset disposals and impairments, net	5,520	(3,532)	(1,361)
Selling, general and administrative expenses	234,282	230,400	231,169
Total Costs and Expenses	1,930,236	1,811,724	1,792,116
Equity in Income of Investees	45,973	33,498	27,152
Operating Income	348,571	345,848	358,552
Other Income (Expense):
Interest income	758	416	518
Interest expense	(36,410)	(35,758)	(31,014)
Other – net	1,458	85,207	34,116
Other Income (Expense)	(34,194)	49,865	3,620
Total before tax	314,377	395,713	362,172
Provision for Income Taxes	75,757	89,425	82,976
Net Income	238,620	306,288	279,196
Net Income Attributable to Noncontrolling Interest	(429)	(417)	(526)
Net Income Attributable to BWX Technologies, Inc.	$ 238,191	$ 305,871	$ 278,670
Basic:
Net income attributable to BWX Technologies, Inc. (USD per share)	$ 2.60	$ 3.24	$ 2.92
Diluted:
Net income attributable to BWX Technologies, Inc. (USD per share)	$ 2.60	$ 3.24	$ 2.91
Shares used in the computation of earnings per share (Note 17):
Basic (in shares)	91,447,088	94,278,894	95,457,193
Diluted (in shares)	91,702,111	94,518,422	95,726,497

Basis of Presentation and Significant Accounting Policies - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Beginning balance	$ 285,502	$ 283,708
Acquisitions	16,609
Translation	(8,946)	1,794
Ending balance	293,165	285,502
Government Operations
Goodwill [Roll Forward]
Beginning balance	155,939	155,939
Acquisitions	16,609
Translation	(461)	0
Ending balance	172,087	155,939
Commercial Operations
Goodwill [Roll Forward]
Beginning balance	129,563	127,769
Acquisitions	0
Translation	(8,485)	1,794
Ending balance	$ 121,078	$ 129,563

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References + Details

Fair Value Measurements

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Fair Value Measurements

FAIR VALUE MEASUREMENTS

FASB Topic Fair Value Measurements and Disclosures defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. This topic also sets forth the disclosure requirements regarding fair value and establishes a hierarchy for valuation inputs that emphasizes the use of observable inputs when measuring fair value. A financial instrument's categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The fair value hierarchy established by this topic is as follows:

•Level 1 – inputs are based upon quoted prices for identical instruments traded in active markets.

•Level 2 – inputs are based upon quoted prices for similar instruments in active markets, quoted prices for similar or identical instruments in inactive markets and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by observable market data for substantially the full term of the assets and liabilities.

•Level 3 – inputs are generally unobservable and typically reflect management's estimates of assumptions that market participants would use in pricing the asset or liability. The fair values are therefore determined using model-based techniques that include option pricing models, discounted cash flow models and similar valuation techniques.

In accordance with FASB Topic Fair Value Measurements, certain investments that were measured at net asset value per share (or its equivalent) ("NAV") have not been classified in the fair value hierarchy. These investments are measured on the fair value of the underlying investments but may not be redeemable at that fair value. Certain of these investments are subject to customary redemption notice periods of up to 90 days. When appropriate, we adjust these net asset values for contributions and distributions, if any, made during the period beginning on the latest NAV valuation date and ending on our measurement date.

We also consider available market data, relevant index returns, preliminary estimates from our investees and other data obtained through research and consultation with third-party advisors in determining the fair value of these investments.

The following sections describe the valuation methodologies we use to measure the fair values of our investments, derivatives and nonrecurring fair value measurements.

Investments

Investments primarily include U.S. Government securities, corporate bonds and mutual funds.

In general, and where applicable, we principally use a composite of observable prices and quoted prices in active markets for identical assets or liabilities to determine fair value. This pricing methodology applies to our Level 1 and Level 2 investments.

Fair Value Measurements

The following is a summary of our investments measured at fair value at December 31, 2022:


	12/31/2022		Level 1		Level 2		Level 3		Unclassified
	(In thousands)
Equity securities

Mutual funds	$	6,341	$	—	$	6,341	$	—	$	—
Available-for-sale securities
U.S. Government and agency securities	3,253		3,253		—		—		—
Corporate bonds	2,265		1,714		551		—		—
Asset-backed securities and collateralized mortgage obligations	42		—		42		—		—
Total	$	11,901	$	4,967	$	6,934	$	—	$	—

The following is a summary of our investments measured at fair value at December 31, 2021:


	12/31/2021		Level 1		Level 2		Level 3		Unclassified
	(In thousands)
Equity securities

Mutual funds	$	7,650	$	—	$	7,650	$	—	$	—
Available-for-sale securities
U.S. Government and agency securities	2,738		2,738		—		—		—
Corporate bonds	2,926		1,852		1,074		—		—
Asset-backed securities and collateralized mortgage obligations	55		—		55		—		—
Total	$	13,369	$	4,590	$	8,779	$	—	$	—

Derivatives

Level 2 derivative assets and liabilities currently consist of FX forward contracts. Where applicable, the value of these derivative assets and liabilities is computed by discounting the projected future cash flow amounts to present value using market-based observable inputs, including FX forward and spot rates, interest rates and counterparty performance risk adjustments. At December 31, 2022 and 2021, we had FX forward contracts outstanding to purchase or sell foreign currencies, primarily Canadian dollars and Euros, with a total fair value of $1.2 million and $(3.2) million, respectively.

Other Financial Instruments

We used the following methods and assumptions in estimating our fair value disclosures for our other financial instruments:

Cash and cash equivalents and restricted cash and cash equivalents. The carrying amounts that we have reported in the accompanying consolidated balance sheets for Cash and cash equivalents and Restricted cash and cash equivalents approximate their fair values due to their highly liquid nature.

Long-term and short-term debt. We base the fair values of debt instruments, including our Senior Notes, on quoted market prices. Where quoted prices are not available, we base the fair values on the present value of future cash flows discounted at estimated borrowing rates for similar debt instruments or on estimated prices based on current yields for debt issues of similar quality and terms. At December 31, 2022 and 2021, the fair value of our Senior Notes due 2028 was $358.0 million and $406.3 million, respectively. At December 31, 2022 and 2021, the fair value of our Senior Notes due 2029 was $352.0 million and $406.5 million, respectively. The fair value of our remaining debt instruments approximated their carrying values at December 31, 2022 and 2021.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Acquisitions and Divestitures - Additional Information (Details) $ in Thousands, $ in Millions					12 Months Ended
	Apr. 11, 2022 USD ($)	May 29, 2020 USD ($)	Jan. 02, 2020 USD ($)	Jan. 02, 2020 CAD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 CAD ($)	Dec. 31, 2020 USD ($)	Jan. 02, 2020 CAD ($)
Business Acquisition [Line Items]
Goodwill					$ 293,165	$ 285,502		$ 283,708
Present value of lease liabilities					22,405
Operating lease, right-of-use asset					49,600
Nuclear Services Business
Business Acquisition [Line Items]
Net assets exchanged in noncash transaction		$ 18,000
Dynamic Controls Limited and Citadel Capital Corporation
Business Acquisition [Line Items]
Purchase of business	$ 49,900
Intangible assets	28,500
Inventory	6,400
Goodwill	16,600
Purchase price allocation adjustment, intangible assets	1,100
Goodwill, purchase accounting adjustments	1,100
Reduction to inventory					$ 2,000
Present value of lease liabilities	7,200
Operating lease, right-of-use asset	$ 7,200
Laker Energy Products, Ltd
Business Acquisition [Line Items]
Purchase of business			$ 17,800	$ 23.3
Goodwill			5,800
Contingent consideration recognized in purchase price									$ 2.5
Intangible assets			8,200
Property, plant and equipment			8,400
Right-of-use assets			2,700
Lease liabilities			$ 2,700
Recorded gain as a component of cost of operations						$ 2,000	$ 2.5

Income Taxes - Income from Continuing Operations Before Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
U.S.	$ 281,677	$ 343,091	$ 314,150
Other than U.S.	32,700	52,622	48,022
Total before tax	$ 314,377	$ 395,713	$ 362,172

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

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+ Details

Segment Reporting - Schedule of Operating Results by Segment (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)
Segment Reporting, Other Significant Reconciling Item [Line Items]
Number of reportable segments \| segment									2	3
Revenues	$ 624,177	$ 523,711	$ 554,208	$ 530,738	$ 591,975	$ 498,727	$ 505,099	$ 528,273	$ 2,232,834	$ 2,124,074	$ 2,123,516
Operating income	101,883	79,878	95,237	71,573	102,215	87,468	73,751	82,414	348,571	345,848	358,552
Other Income (Expense)									(34,194)	49,865	3,620
Total before tax									314,377	395,713	362,172
Losses (Gains) on Asset Disposals and Impairments, Net:									5,520	(3,532)	(1,361)
Equity in Income of Investees	11,092	$ 14,783	$ 11,319	$ 8,779	7,301	$ 10,618	$ 7,263	$ 8,316	45,973	33,498	27,152
Total Capital Expenditures									198,312	311,052	255,027
Total Depreciation and Amortization									73,842	69,080	60,674
Total Assets	2,618,939				2,501,380				2,618,939	2,501,380	2,293,503
Total Investment in Unconsolidated Affiliates	100,198				85,284				100,198	85,284	71,806
Government Operations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Revenues									1,808,483	1,725,097	1,763,127
Commercial Operations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Revenues									427,358	407,082	371,269
Reportable Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Revenues									2,235,841	2,132,179	2,134,396
Operating income									363,919	364,792	382,165
Total Capital Expenditures									191,946	300,622	243,811
Total Depreciation and Amortization									66,787	62,369	53,829
Total Assets	2,504,017				2,407,245				2,504,017	2,407,245	2,183,348
Reportable Segments \| Government Operations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Revenues									1,808,483	1,725,097	1,763,127
Operating income									336,501	329,549	345,250
Losses (Gains) on Asset Disposals and Impairments, Net:									(250)	(8)	320
Equity in Income of Investees									45,973	33,498	27,152
Total Capital Expenditures									103,093	147,051	137,197
Total Depreciation and Amortization									47,982	42,485	35,398
Total Assets	1,498,472				1,430,863				1,498,472	1,430,863	1,353,122
Total Investment in Unconsolidated Affiliates	100,198				85,284				100,198	85,284	71,806
Reportable Segments \| Commercial Operations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Revenues									427,358	407,082	371,269
Operating income									27,418	35,243	36,915
Losses (Gains) on Asset Disposals and Impairments, Net:									6,233	(2,548)	(1,681)
Equity in Income of Investees									0	0	0
Total Capital Expenditures									88,853	153,571	106,614
Total Depreciation and Amortization									18,805	19,884	18,431
Total Assets	1,005,545				976,382				1,005,545	976,382	830,226
Total Investment in Unconsolidated Affiliates	$ 0				$ 0				0	0	0
Eliminations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Revenues									(3,007)	(8,105)	(10,880)
Operating income									(15,348)	(18,944)	(23,613)
Losses (Gains) on Asset Disposals and Impairments, Net:									(463)	(976)	0
Eliminations \| Government Operations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Revenues									(2,941)	(7,327)	(10,327)
Eliminations \| Commercial Operations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Revenues									$ (66)	$ (778)	$ (553)

Revenue Recognition - Retainages (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue from External Customer [Line Items]
Contract with customer, liability	$ 88,726	$ 111,619
Advanced billings revenue recognized	91,900	67,500
Noncurrent retainages		1,300
Unbilled receivables
Revenue from External Customer [Line Items]
Contract with customer asset	521,291	528,644
Retainages
Revenue from External Customer [Line Items]
Contract with customer asset	$ 48,566	$ 51,507

Stock-Based Compensation - Schedule of Summarized Activity of Stock Appreciation (Detail) - Stock Appreciation Rights $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
Number of Shares
Outstanding at beginning of period (shares)	27
Granted (in shares)	0
Exercised (in shares)	(10)
Cancelled/expired/forfeited (in shares)	0
Outstanding at end of period (shares)	17
Weighted- Average Exercise Price
Outstanding at beginning of period (USD per share) \| $ / shares	$ 23.62
Exercised (USD per share) \| $ / shares	23.62
Outstanding at end of period (USD per share) \| $ / shares	$ 23.62
Weighted-Average Remaining Contractual Term and Aggregate Intrinsic Value
Outstanding at end of period, weighted-average remaining contractual term (in years)	2 years 2 months 12 days
Outstanding at end of period, aggregate intrinsic value \| $	$ 0.6
Exercisable at end of period, number of options (in shares)	17
Exercisable at end of period, weighted-average exercise price (USD per share) \| $ / shares	$ 23.62
Exercisable at end of period, weighted-average remaining contractual term	2 years 2 months 12 days
Exercisable at end of period, aggregate intrinsic value \| $	$ 0.6

Pension Plans and Postretirement Benefits - Assumed Health Care Cost Trend Rates (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Health care cost trend rate assumed for next year	7.25%	7.50%
Rates to which the cost trend rate is assumed to decline (ultimate trend rate)	4.50%	4.50%
Year that the rate reaches ultimate trend rate	2034	2034

Equity Method Investments - Summary of Combined Balance Sheet Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Current assets	$ 771,619	$ 773,732
Total Assets	2,618,939	2,501,380
Current liabilities	367,860	459,615
Owners' equity	748,355	637,235	$ 617,768	$ 404,112
Total Liabilities and Owners' Equity	2,618,939	2,501,380
Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Current assets	566,076	546,233
Noncurrent assets	445	634
Total Assets	566,521	546,867
Current liabilities	292,081	284,821
Owners' equity	274,440	262,046
Total Liabilities and Owners' Equity	$ 566,521	$ 546,867

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Reference 20: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

- Definition

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

+ References

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Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

Revenue Recognition - Additional details (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Net favorable changes in estimates resulting in increased revenues		$ 26.6	$ 30.7	$ 44.9
Increase in cost of operations		2.2	4.2	$ 2.1
Decrease in operating income	$ (11.3)	$ 11.3
Decrease in earnings per share (in USD per share)		$ 0.09
Decrease in receivables billed		$ 7.4
Revenue recognized from advance billings on contracts		22.9
Advanced billings revenue recognized		91.9	$ 67.5
Revenue, remaining performance obligation, amount		$ 4,144.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage		42.00%
Revenue, remaining performance obligation, expected timing of satisfaction		1 year

Basis of Presentation and Significant Accounting Policies - Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 1,917,317	$ 1,776,689
Less: Accumulated depreciation	782,420	731,049
Property, Plant and Equipment, Net	1,134,897	1,045,640	$ 816,471
Land
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	9,844	9,538
Buildings
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	365,955	321,872
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	1,026,024	957,423
Property under construction
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 515,494	$ 487,856

Pension Plans and Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2022

Retirement Benefits [Abstract]

Obligations and Funded Status


	Pension Benefits Year Ended December 31,				Other Benefits Year Ended December 31,
	2022		2021		2022		2021
	(In thousands)
Change in benefit obligation:
Benefit obligation at beginning of period	$	1,308,266	$	1,414,055	$	59,301	$	61,086
Service cost	11,116		11,667		650		760
Interest cost	30,924		27,170		1,387		1,197
Plan participants' contributions	224		199		346		488
Amendments	3,100		2,314		261		3,402

Settlements	(48,777)		(38,330)		—		—
Actuarial loss (gain)	(307,946)		(45,476)		(14,747)		(4,944)

Foreign currency exchange rate changes	(6,564)		1,669		(921)		197
Benefits paid	(63,365)		(65,002)		(3,227)		(2,885)
Benefit obligation at end of period	$	926,978	$	1,308,266	$	43,050	$	59,301
Change in plan assets:
Fair value of plan assets at beginning of period	$	1,256,799	$	1,281,232	$	53,512	$	52,077
Actual return on plan assets	(263,881)		72,030		(6,003)		2,898
Plan participants' contributions	224		199		346		488
Company contributions	14,172		6,164		1,032		1,008
Settlements	(61,416)		(39,439)		—		—

Foreign currency exchange rate changes	(6,842)		1,615		—		—
Benefits paid	(63,365)		(65,002)		(3,271)		(2,959)
Fair value of plan assets at the end of period	875,691		1,256,799		45,616		53,512
Funded status	$	(51,287)	$	(51,467)	$	2,566	$	(5,789)
Amounts recognized in the balance sheet consist of:
Prepaid postretirement benefit obligation	$	—	$	—	$	22,232	$	20,122
Prepaid pension	9,542		10,573		—		—
Accrued employee benefits	(2,997)		(3,125)		(1,509)		(1,578)
Accumulated postretirement benefit obligation	—		—		(18,157)		(24,333)
Pension liability	(57,832)		(58,915)		—		—
Accrued benefit liability, net	$	(51,287)	$	(51,467)	$	2,566	$	(5,789)
Amount recognized in accumulated comprehensive income (before taxes):
Prior service cost (credit)	$	20,363	$	20,536	$	2,750	$	2,520
Supplemental information:
Plans with accumulated benefit obligation in excess of plan assets:
Projected benefit obligation	$	877,431	$	1,172,881	N/A		N/A
Accumulated benefit obligation	$	873,185	$	1,166,855	$	17,795	$	23,503
Fair value of plan assets	$	816,693	$	1,110,841	$	—	$	—
Plans with plan assets in excess of accumulated benefit obligation:
Projected benefit obligation	$	49,547	$	135,385	N/A		N/A
Accumulated benefit obligation	$	49,547	$	135,375	$	25,255	$	35,798
Fair value of plan assets	$	58,999	$	145,958	$	45,616	$	53,512

Components of Net Periodic Benefit Cost

Components of net periodic benefit cost included in net income are as follows:


	Pension Benefits Year Ended December 31,						Other Benefits Year Ended December 31,
	2022		2021		2020		2022		2021		2020
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	11,116	$	11,667	$	10,650	$	650	$	760	$	642
Interest cost	30,924		27,170		37,199		1,387		1,197		1,612
Expected return on plan assets	(83,254)		(81,778)		(77,298)		(2,974)		(2,891)		(2,691)
Amortization of prior service cost	3,257		3,097		3,370		26		(178)		(193)
Recognized net actuarial loss (gain)	52,202		(34,690)		6,829		(5,616)		(4,876)		(458)
Net periodic benefit cost (income)	$	14,245	$	(74,534)	$	(19,250)	$	(6,527)	$	(5,988)	$	(1,088)

Summary of Additional Information

Additional Information


	Pension Benefits Year Ended December 31,				Other Benefits Year Ended December 31,
	2022		2021		2022		2021
	(In thousands)
Decrease in accumulated other comprehensive income due to actuarial losses – before taxes	$	(3,100)	$	(2,314)	$	(261)	$	(3,402)

Weighted Average Assumptions

Assumptions


	Pension Benefits				Other Benefits
	2022		2021		2022		2021
Weighted-average assumptions used to determine net periodic benefit obligations at December 31:
Discount rate	5.42	%	2.91	%	5.32	%	2.85	%


	Pension Benefits						Other Benefits
	2022		2021		2020		2022		2021		2020
Weighted-average assumptions used to determine net periodic benefit cost for the years ended December 31:
Discount rate to determine interest cost	2.42	%	1.96	%	2.78	%	2.42	%	1.87	%	2.62	%
Expected return on plan assets	7.10	%	6.80	%	6.95	%	5.67	%	5.66	%	5.66	%

Assumed health-care cost trend rates

All of the assets for these postretirement benefit plans are contributed into a Voluntary Employees' Beneficiary Association trust.


	2022		2021
Assumed health care cost trend rates at December 31:
Health care cost trend rate assumed for next year	7.25	%	7.50	%
Rates to which the cost trend rate is assumed to decline (ultimate trend rate)	4.50	%	4.50	%
Year that the rate reaches ultimate trend rate	2034		2034

Plan Asset Allocations by Asset Category

The following is a summary of the asset allocations for the Master Trust at December 31, 2022 and 2021 by asset category:


	December 31,
	2022		2021
Asset Category:
U.S. Government Securities	36	%	32	%
Commingled and Mutual Funds	25	%	29	%
Real Estate	16	%	11	%
Diversified Credit	13	%	11	%
Fixed Income (excluding U.S. Government Securities)	5	%	11	%
Partnerships with Security Holdings	3	%	4	%
Other	2	%	2	%
Total	100	%	100	%

The following is a summary of the asset allocations of these plans at December 31, 2022 and 2021 by asset category:


	December 31,
	2022		2021
Asset Category:
Fixed Income	51	%	20	%
Commingled and Mutual Funds	29	%	11	%
Cash and Other	20	%	69	%
Total	100	%	100	%

Target Allocation by Asset Class

The target allocation for 2023 for the domestic plans, by asset class, is as follows:


Asset Class:
Fixed Income	45	%
Equities	28	%
Other	27	%

The target allocation for 2023 for the Canadian plan, by asset class, is as follows:


Asset Class:
Fixed Income	65	%
Equities	35	%

Summary of Total Investments Measured at Fair Value

The following is a summary of total assets for our plans measured at fair value at December 31, 2022:


	12/31/2022		Level 1		Level 2		Level 3		Unclassified
	(In thousands)
Pension and Other Benefits:
U.S. Government Securities	$	305,995	$	305,995	$	—	$	—	$	—
Commingled and Mutual Funds	230,674		42,180		—		—		188,494
Real Estate	132,867		—		—		—		132,867
Diversified Credit	108,363		—		—		—		108,363
Fixed Income	95,967		35,563		—		—		60,404
Partnerships with Security Holdings	25,259		—		—		—		25,259
Cash, Cash Equivalents and Accrued Items (1)	22,182		—		—		—		22,182
Total Assets	$	921,307	$	383,738	$	—	$	—	$	537,569

The following is a summary of total assets for our plans measured at fair value at December 31, 2021:


	12/31/2021		Level 1		Level 2		Level 3		Unclassified
	(In thousands)
Pension and Other Benefits:
U.S. Government Securities	$	369,980	$	365,295	$	4,685	$	—	$	—
Commingled and Mutual Funds	358,423		77,680		—		—		280,743
Fixed Income	182,169		31,856		128,829		—		21,484
Diversified Credit	133,508		—		—		—		133,508
Real Estate	126,886		—		—		—		126,886
Investment Contract (1)	46,817		—		—		46,817		—
Partnerships with Security Holdings	46,515		—		—		—		46,515
Cash, Cash Equivalents and Accrued Items (2)	46,013		—		—		—		46,013
Total Assets	$	1,310,311	$	474,831	$	133,514	$	46,817	$	655,149

The following is a summary of the changes in the Plans' Level 3 instruments for the years ended December 31, 2022 and 2021:


	Year Ended December 31,
	2022		2021
	(In thousands)
Balance at beginning of period	$	46,817	$	—
Purchases	—		45,645
Dispositions	(35,822)		—
Realized gain (loss)	(6,988)		—
Change in unrealized gain (loss)	(652)		652
Translation	(3,355)		520
Balance at end of period	$	—	$	46,817

Cash Flows


	Domestic Plans				Foreign Plans
	Pension Benefits		Other Benefits		Pension Benefits		Other Benefits
	(In thousands)
Expected employer contributions to trusts of defined benefit plans:
2023	$	—	$	—	$	2,333	N/A
Expected benefit payments:
2023	$	62,828	$	2,660	$	758	$	544
2024	$	64,396	$	2,654	$	892	$	581
2025	$	65,493	$	2,601	$	1,026	$	626
2026	$	66,355	$	2,527	$	1,157	$	684
2027	$	66,992	$	2,468	$	1,286	$	720
2028-2032	$	333,481	$	11,398	$	7,706	$	3,784

Equity Method Investments

12 Months Ended

Dec. 31, 2022

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments

EQUITY METHOD INVESTMENTS

We have investments in entities that we account for using the equity method. Our share of the undistributed earnings of our equity method investees were $41.3 million and $39.4 million at December 31, 2022 and 2021, respectively. These amounts are included in Investments in Unconsolidated Affiliates on our consolidated balance sheets.

The following tables summarize combined balance sheet and income statement information for investments accounted for under the equity method:


	December 31,
	2022		2021
	(In thousands)
Current assets	$	566,076	$	546,233
Noncurrent assets	445		634
Total Assets	$	566,521	$	546,867
Current liabilities	$	292,081	$	284,821
Owners' equity	274,440		262,046
Total Liabilities and Owners' Equity	$	566,521	$	546,867


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Revenues	$	4,580,032	$	4,254,635	$	3,980,066
Gross profit	$	176,592	$	159,935	$	142,709
Net income	$	173,339	$	156,994	$	139,988

Reimbursable costs recorded in revenues by the unconsolidated joint ventures in our Government Operations segment totaled $4,453.7 million, $4,102.9 million and $3,851.5 million for the years ended December 31, 2022, 2021 and 2020, respectively.

Income taxes for the investees are the responsibility of the respective owners. Accordingly, no provision for income taxes has been recorded by the investees.

Reconciliations of net income per combined income statement information of our investees to equity in income of investees per our consolidated statements of income are as follows:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Equity income based on stated ownership percentages	$	46,784	$	31,870	$	27,266
GAAP and other adjustments	(811)		1,628		(114)
Equity in income of investees	$	45,973	$	33,498	$	27,152

Our transactions with unconsolidated affiliates were as follows:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Sales to	$	19,857	$	11,838	$	12,186
Dividends received	$	42,512	$	20,475	$	25,005
Capital contributions, net of returns	$	11,450	$	—	$	(88)

At December 31, 2022 and 2021, Accounts receivable – other included amounts due from unconsolidated affiliates of $1.5 million and $1.6 million, respectively.

Equity Method Investments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Results Related To Equity Accounted Investees [Line Items]
Undistributed earnings of equity method investees	$ 41,300,000	$ 39,400,000
Reimbursable costs included in revenues of equity method investees	4,453,700,000	4,102,900,000	$ 3,851,500,000
Provision for income taxes	75,757,000	89,425,000	$ 82,976,000
Investees
Schedule Of Results Related To Equity Accounted Investees [Line Items]
Provision for income taxes	0
Other Assets
Schedule Of Results Related To Equity Accounted Investees [Line Items]
Amounts due from related parties included in other assets	$ 1,500,000	$ 1,600,000

- Definition

For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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+ Details

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Pension Plans and Postretirement Benefits - Target Allocation by Asset Class (Detail) - Pension Plan	Dec. 31, 2022
UNITED STATES \| Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Target allocation by asset class	45.00%
UNITED STATES \| Equities
Defined Benefit Plan Disclosure [Line Items]
Target allocation by asset class	28.00%
UNITED STATES \| Cash and Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation by asset class	27.00%
Canada \| Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Target allocation by asset class	65.00%
Canada \| Equities
Defined Benefit Plan Disclosure [Line Items]
Target allocation by asset class	35.00%

Income Taxes - Reconciliation of the Income Tax Provision Related to Continuing Operations from the U.S. Statutory Federal Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate	21.00%	21.00%	21.00%
State and local income taxes	1.70%	1.10%	1.90%
Foreign rate differential	0.50%	0.60%	0.60%
Excess tax deductions on equity compensation	(0.10%)	(0.10%)	(0.30%)
Other	1.00%	0.00%	(0.30%)
Effective tax rate	24.10%	22.60%	22.90%

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Basic:
Net Income Attributable to BWX Technologies, Inc.									$ 238,191	$ 305,871	$ 278,670
Weighted-average common shares									91,447,088	94,278,894	95,457,193
Basic earnings per common share	$ 0.47	$ 0.67	$ 0.82	$ 0.64	$ 1.27	$ 0.64	$ 0.62	$ 0.73	$ 2.60	$ 3.24	$ 2.92
Diluted:
Weighted-average common shares									91,447,088	94,278,894	95,457,193
Effect of dilutive securities:
Stock options, restricted stock and performance shares (in shares)									255,023	239,528	269,304
Adjusted weighted average common shares (in shares)									91,702,111	94,518,422	95,726,497
Diluted earnings per common share:
Diluted earnings per common share (USD per share)	$ 0.47	$ 0.67	$ 0.82	$ 0.64	$ 1.26	$ 0.63	$ 0.62	$ 0.73	$ 2.60	$ 3.24	$ 2.91
Antidilutive shares related to stock options excluded from the diluted share (in shares)									10,419	0	0

Capital Stock - Additional Information (Detail) - USD ($)		12 Months Ended
	Nov. 06, 2018	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Apr. 30, 2021
Capital Stock [Line Items]
Common stock repurchased		$ 26,990,000	$ 230,828,000	$ 27,288,000
Share Repurchase Program
Capital Stock [Line Items]
Additional common stock at an aggregate purchase price	$ 250,000,000	$ 20,000,000	$ 225,800,000
Stock repurchase program, term	3 years
Common stock at an aggregate authorized purchase price					$ 500,000,000
Common stock repurchased (in shares)		374,568	4,134,767	338,521
Common stock repurchased				$ 22,000,000
Stock repurchase program, remaining authorized repurchase amount		$ 397,600,000

Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Restrictions on Cash and Cash Equivalents


	December 31,
	2022		2021
	(In thousands)
Cash and cash equivalents	$	35,244	$	33,891
Restricted cash and cash equivalents	2,928		2,896
Restricted cash and cash equivalents included in Other Assets	2,818		2,988
Total cash and cash equivalents and restricted cash and cash equivalents as presented on our consolidated statements of cash flows	$	40,990	$	39,775

Property, Plant and Equipment

Property, plant and equipment is stated at cost and is set forth below:


	December 31,
	2022		2021
	(In thousands)
Land	$	9,844	$	9,538
Buildings	365,955		321,872
Machinery and equipment	1,026,024		957,423
Property under construction	515,494		487,856
	1,917,317		1,776,689
Less: Accumulated depreciation	782,420		731,049
Property, Plant and Equipment, Net	$	1,134,897	$	1,045,640

Changes in Carrying Amount of Goodwill

The following summarizes the changes in the carrying amount of Goodwill:


	Government Operations		Commercial Operations		Total
	(In thousands)
Balance at December 31, 2020	$	155,939	$	127,769	$	283,708

Translation	—		1,794		1,794
Balance at December 31, 2021	$	155,939	$	129,563	$	285,502
Acquisitions (Note 2)	16,609		—		16,609
Translation	(461)		(8,485)		(8,946)
Balance at December 31, 2022	$	172,087	$	121,078	$	293,165

Schedule of Intangible Assets

Our Intangible Assets were as follows:


	December 31,
	2022		2021		2020
	(In thousands)
Amortized intangible assets:
Gross cost:
Technical support agreement	$	65,069	$	69,781	$	68,785
Customer relationships	56,176		40,247		39,954
Unpatented technology	39,609		38,073		37,529
CNSC class 1B nuclear facility license	25,094		26,911		26,528
Acquired backlog	13,537		7,595		7,487
Patented technology	738		792		780

All other	812		871		858
Total	$	201,035	$	184,270	$	181,921
Accumulated amortization:
Technical support agreement	$	(12,495)	$	(10,366)	$	(7,227)
Customer relationships	(20,590)		(18,176)		(15,996)
Unpatented technology	(7,966)		(6,398)		(4,584)
CNSC class 1B nuclear facility license	(5,052)		(4,521)		(3,573)
Acquired backlog	(4,474)		(2,531)		(1,248)
Patented technology	(405)		(363)		(286)

All other	(271)		(194)		(86)
Total	$	(51,253)	$	(42,549)	$	(33,000)
Net amortized intangible assets	$	149,782	$	141,721	$	148,921
Unamortized intangible assets:
NRC category 1 license	$	43,830	$	43,830	$	43,830

Changes in Carrying Amount of Intangible Assets

The following summarizes the changes in the carrying amount of Intangible Assets:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Balance at beginning of period	$	185,551	$	192,751	$	191,392
Acquisitions (Note 2)	28,500		—		8,180
Amortization expense	(10,901)		(9,329)		(8,824)
Translation and other (1)	(9,538)		2,129		2,003
Balance at end of period	$	193,612	$	185,551	$	192,751

(1)Includes $(0.6) million related to the divestiture of the U.S.-based commercial nuclear services business during the year ended December 31, 2020.

Estimated Amortization Expense

Estimated amortization expense for the next five fiscal years is as follows (amounts in thousands):


Year Ended December 31,	Amount
2023	$	11,328
2024	$	11,328
2025	$	11,328
2026	$	10,147
2027	$	8,552

Maturities of Lease Liabilities

The maturities of our lease liabilities at December 31, 2022 were as follows (amounts in thousands):


2023	$	4,546
2024	3,647
2025	3,026
2026	2,426
2027	1,609
Thereafter	15,824
Total lease payments	$	31,078
Less: Interest	(8,673)
Present value of lease liabilities (1)	$	22,405

(1)Includes current lease liabilities of $4.4 million.

Changes in Carrying Amount of Debt Issuance Costs

The following summarizes the changes in the carrying amount of these assets:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Balance at beginning of period	$	10,696	$	12,269	$	8,006
Additions	2,405		4,838		6,803
Interest expense (1)	(1,975)		(6,411)		(2,540)
Balance at end of period	$	11,126	$	10,696	$	12,269

Asset Retirement Obligations

The following summarizes the changes in the carrying amount of these liabilities:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Balance at beginning of period	$	84,132	$	78,110	$	77,288
Costs incurred	(1,223)		(215)		(1,608)
Additions/adjustments	(4,289)		—		(3,284)
Accretion	5,158		5,996		5,343
Translation	(1,266)		241		371
Balance at end of period (1)	$	82,512	$	84,132	$	78,110

(1)Includes current asset retirement obligations of $4.7 million, $4.7 million and $2.8 million at December 31, 2022, 2021 and 2020, respectively.

Accumulated Other Comprehensive Income

The components of Accumulated other comprehensive income included in Stockholders' Equity are as follows:


	December 31,
	2022		2021
	(In thousands)
Currency translation adjustments	$	(4,207)	$	30,627
Net unrealized gain (loss) on derivative financial instruments	105		(694)
Unrecognized prior service cost on benefit obligations	(17,955)		(18,022)
Net unrealized gain on available-for-sale investments	127		232
Accumulated other comprehensive income	$	(21,930)	$	12,143

Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income

The amounts reclassified out of Accumulated other comprehensive income by component and the affected consolidated statements of income line items are as follows:


	Year Ended December 31,
	2022		2021		2020
Accumulated Other Comprehensive Income (Loss) Component Recognized	(In thousands)						Line Item Presented
Realized (loss) gain on derivative financial instruments	$	(370)	$	307	$	(35)	Revenues
	(343)		(712)		695		Cost of operations
	(713)		(405)		660		Total before tax
	181		103		(173)		Provision for Income Taxes
	$	(532)	$	(302)	$	487	Net Income
Amortization of prior service cost on benefit obligations	$	(3,283)	$	(2,919)	$	(3,177)	Other – net
	657		624		645		Provision for Income Taxes
	$	(2,626)	$	(2,295)	$	(2,532)	Net Income
Total reclassification for the period	$	(3,158)	$	(2,597)	$	(2,045)

Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2022

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Information

The following tables set forth selected unaudited quarterly financial information for the years ended December 31, 2022 and 2021:


	Year Ended December 31, 2022 Quarter Ended
	March 31, 2022		June 30, 2022		September 30, 2022		December 31, 2022
	(In thousands, except per share amounts)
Revenues	$	530,738	$	554,208	$	523,711	$	624,177
Operating income (1)	$	71,573	$	95,237	$	79,878	$	101,883
Equity in income of investees	$	8,779	$	11,319	$	14,783	$	11,092
Net Income Attributable to BWX Technologies, Inc.	$	59,010	$	74,613	$	61,603	$	42,965
Earnings per common share:
Basic:
Net Income Attributable to BWX Technologies, Inc.	$	0.64	$	0.82	$	0.67	$	0.47
Diluted:
Net Income Attributable to BWX Technologies, Inc.	$	0.64	$	0.82	$	0.67	$	0.47

(1)Includes equity in income of investees.


	Year Ended December 31, 2021 Quarter Ended
	March 31, 2021		June 30, 2021		September 30, 2021		December 31, 2021
	(In thousands, except per share amounts)
Revenues	$	528,273	$	505,099	$	498,727	$	591,975
Operating income (1)	$	82,414	$	73,751	$	87,468	$	102,215
Equity in income of investees	$	8,316	$	7,263	$	10,618	$	7,301
Net Income Attributable to BWX Technologies, Inc.	$	69,749	$	59,347	$	59,914	$	116,861
Earnings per common share:
Basic:
Net Income Attributable to BWX Technologies, Inc.	$	0.73	$	0.62	$	0.64	$	1.27
Diluted:
Net Income Attributable to BWX Technologies, Inc.	$	0.73	$	0.62	$	0.63	$	1.26

(1)Includes equity in income of investees.

Basis of Presentation and Significant Accounting Policies - Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Stockholders' equity	$ 748,355	$ 637,235	$ 617,768	$ 404,112
Currency translation adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Stockholders' equity	(4,207)	30,627
Net unrealized gain (loss) on derivative financial instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Stockholders' equity	105	(694)
Unrecognized prior service cost on benefit obligations
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Stockholders' equity	(17,955)	(18,022)
Net unrealized gain on available-for-sale investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Stockholders' equity	127	232
Accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives
Stockholders' equity	$ (21,930)	$ 12,143	$ 8,198	$ (7,448)

- Definition

+ References

+ Details

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Capital In Excess of Par Value	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock	Stockholders' Equity	Stockholders' Equity Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interest
Balance (in shares) at Dec. 31, 2019			126,579,285
Balance at Dec. 31, 2019	$ 404,112	$ 0	$ 1,266	$ 134,069	$ 1,344,383	$ 0	$ (7,448)	$ 0	$ (1,068,164)	$ 404,106	$ 0	$ 6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	279,196				278,670					278,670		526
Dividends declared	(73,103)				(73,103)					(73,103)
Currency translation adjustments	15,685						15,685			15,685
Derivative financial instruments	(560)						(560)			(560)
Defined benefit obligations	712						712			712
Available-for-sale investments	(191)						(191)			(191)
Exercises of stock options (in shares)			95,750
Exercises of stock options	2,891		$ 1	2,890						2,891
Shares placed in treasury	(27,288)								(27,288)	(27,288)
Stock-based compensation charges (in shares)			334,501
Stock-based compensation charges	16,844		$ 3	16,841						16,844
Distributions to noncontrolling interests	(530)											(530)
Balance (in shares) at Dec. 31, 2020			127,009,536
Balance at Dec. 31, 2020	617,768	0	$ 1,270	153,800	1,549,950	0	8,198	0	(1,095,452)	617,766	0	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	306,288				305,871					305,871		417
Dividends declared	(80,070)				(80,070)					(80,070)
Currency translation adjustments	6,173						6,173			6,173
Derivative financial instruments	(198)						(198)			(198)
Defined benefit obligations	(2,120)						(2,120)			(2,120)
Available-for-sale investments	90						90			90
Exercises of stock options (in shares)			76,682
Exercises of stock options	1,878			1,878						1,878
Shares placed in treasury	(230,828)								(230,828)	(230,828)
Stock-based compensation charges (in shares)			225,767
Stock-based compensation charges	18,613		$ 3	18,610						18,613
Distributions to noncontrolling interests	$ (359)											(359)
Balance (in shares) at Dec. 31, 2021	127,311,985		127,311,985
Balance at Dec. 31, 2021	$ 637,235	$ 0	$ 1,273	174,288	1,775,751	$ 0	12,143	$ 0	(1,326,280)	637,175	$ 0	60
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	238,620				238,191					238,191		429
Dividends declared	(80,972)				(80,972)					(80,972)
Currency translation adjustments	(34,834)						(34,834)			(34,834)
Derivative financial instruments	799						799			799
Defined benefit obligations	67						67			67
Available-for-sale investments	(105)						(105)			(105)
Exercises of stock options (in shares)			35,878
Exercises of stock options	852			852						852
Shares placed in treasury	(26,990)								(26,990)	(26,990)
Stock-based compensation charges (in shares)			323,893
Stock-based compensation charges	14,127		$ 4	14,123						14,127
Distributions to noncontrolling interests	$ (444)											(444)
Balance (in shares) at Dec. 31, 2022	127,671,756		127,671,756
Balance at Dec. 31, 2022	$ 748,355		$ 1,277	$ 189,263	$ 1,932,970		$ (21,930)		$ (1,353,270)	$ 748,310		$ 45

Stock-Based Compensation - Summarized Activity of Stock Options (Detail) - BWXT Stock Options $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
Number of Shares
Outstanding at beginning of period (shares)	125
Granted (shares)	0
Exercised (in shares)	(35)
Cancelled/expired/forfeited (in shares)	0
Outstanding at end of period (shares)	90
Weighted- Average Exercise Price
Outstanding at beginning of period (USD per share) \| $ / shares	$ 23.65
Exercised (USD per share) \| $ / shares	23.71
Outstanding at end of period (USD per share) \| $ / shares	$ 23.62
Weighted-Average Remaining Contractual Term and Aggregate Intrinsic Value
Outstanding at end of period, weighted-average remaining contractual term (in years)	2 years
Outstanding at end of period, aggregate intrinsic value \| $	$ 3.1
Exercisable at end of period, number of options (in shares)	90
Exercisable at end of period, weighted-average exercise price (USD per share) \| $ / shares	$ 23.62
Exercisable at end of period, weighted-average remaining contractual term	2 years
Exercisable at end of period, aggregate intrinsic value \| $	$ 3.1

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Customary redemption notice periods	90 days
Senior Notes \| Senior Notes Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior notes	$ 358.0	$ 406.3
Senior Notes \| Senior Notes Due 2029
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior notes	352.0	406.5
Foreign Exchange Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of foreign currency forward contracts	$ 1.2	$ (3.2)

Income Taxes - Components of Income Tax Provision from Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
U.S. – federal	$ 54,683	$ 31,535	$ 53,340
U.S. – state and local	5,360	1,030	7,587
Other than U.S.	10,199	16,769	14,159
Total current	70,242	49,334	75,086
Deferred:
U.S. – federal	5,755	40,463	10,852
U.S. – state and local	(34)	3,473	(536)
Other than U.S.	(206)	(3,845)	(2,426)
Total deferred	5,515	40,091	7,890
Provision for Income Taxes	$ 75,757	$ 89,425	$ 82,976

Quarterly Financial Data - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Contract adjustment			$ 11,300		$ (11,300)
Premium for early redemption of senior notes		$ 10,800			$ 0	$ 10,752	$ 0
Write-off of deferred financing costs		$ 4,200
Defined benefit plan, actuarial gain (loss)	$ (46,600)			$ 39,600

Segment Reporting - Additional Information (Details) - Sales Revenue, Net	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Government Contracts Concentration Risk \| U.S. Government
Segment Reporting Information [Line Items]
Concentration risk percentage	76.00%	76.00%	77.00%
Customer Concentration Risk \| U.S. Government \| Government Operations
Segment Reporting Information [Line Items]
Concentration risk percentage	94.00%	95.00%	94.00%
Customer Concentration Risk \| Utility Customers
Segment Reporting Information [Line Items]
Concentration risk percentage	14.00%	14.00%	13.00%
Customer Concentration Risk \| Utility Customers \| Commercial Operations
Segment Reporting Information [Line Items]
Concentration risk percentage	74.00%	75.00%	73.00%

Basis of Presentation and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Reportable Segments	Reportable Segments We operate in two reportable segments: Government Operations and Commercial Operations. Our reportable segments reflect changes we made during the first quarter of 2022 to better align our businesses by their government and commercial nature, which reflects the manner in which our operating segment information is reported for purposes of assessing operating performance and allocating resources. Prior to 2022, we reported three segments: Nuclear Operations Group, Nuclear Power Group and Nuclear Services Group. Our Government Operations segment consists of our legacy Nuclear Operations Group and Nuclear Services Group segments with certain research and development activities in the areas of advanced reactors and advanced manufacturing. Our Commercial Operations segment consists of our legacy Nuclear Power Group segment with certain research and development and commercialization activities in the areas of medical and industrial radioisotopes and radiopharmaceuticals. Both segments now include research and development and certain commercialization activities associated with new technologies previously reported outside of our reportable segments. The change in our reportable segments had no impact on our previously reported consolidated results of operations, financial condition or cash flows. We have applied the change in reportable segments to previously reported historical financial information and related disclosures included in this annual report on Form 10-K. Our reportable segments are further described as follows: •Our Government Operations segment manufactures naval nuclear reactors, including the related nuclear fuel, for the U.S. Naval Nuclear Propulsion Program for use in submarines and aircraft carriers. Through this segment, we also fabricate fuel-bearing precision components that range in weight from a few grams to hundreds of tons, manufacture electro-mechanical equipment, perform design, manufacturing, inspection, assembly and testing activities and downblend Cold War-era government stockpiles of high-enriched uranium. In addition, we supply proprietary and sole-source valves, manifolds and fittings to global naval and commercial shipping customers. In-house capabilities also include wet chemistry uranium processing, advanced heat treatment to optimize component material properties and a controlled, clean-room environment with the capacity to assemble railcar-size components. This segment also provides various other services, primarily through joint ventures, to the U.S. Government including nuclear materials management and operation, environmental management and administrative and operating services for various U.S. Government-owned facilities. These services are provided to the U.S. Department of Energy ("DOE"), including the National Nuclear Security Administration, the Office of Nuclear Energy, the Office of Science and the Office of Environmental Management, the Department of Defense and NASA. In addition, this segment also develops technology for advanced nuclear reactors for a variety of power and propulsion applications in the space and terrestrial domains and offers complete advanced nuclear fuel and reactor design and engineering, licensing and manufacturing services for these programs. •Our Commercial Operations segment fabricates commercial nuclear steam generators, nuclear fuel, fuel handling systems, pressure vessels, reactor components, heat exchangers, tooling delivery systems and other auxiliary equipment, including containers for the storage of spent nuclear fuel and other high-level waste and supplies nuclear-grade materials and precisely machined components for nuclear utility customers. We have supplied the nuclear industry with more than 1,300 large, heavy components worldwide, and we are the only commercial heavy nuclear component manufacturer in North America. This segment also provides specialized engineering services that include structural component design, 3-D thermal-hydraulic engineering analysis, weld and robotic process development, electrical and controls engineering and metallurgy and materials engineering. In addition, this segment offers in-plant inspection, maintenance and modification services for nuclear steam generators, heat exchangers, reactors, fuel handling systems and balance of plant equipment, as well as specialized non-destructive examination and tooling/repair solutions. This segment also manufactures medical radioisotopes, radiopharmaceuticals and medical devices, and partners with life science and pharmaceutical companies developing new drugs.
Use of Estimates	Use of Estimates We use estimates and assumptions to prepare our financial statements in conformity with GAAP. Some of our more significant estimates include estimates of costs to complete long-term contracts and the associated revenues, estimates of the fair value of acquired intangible and other assets, estimates we make in selecting assumptions related to the valuations of our pension and postretirement benefit plans, including the selection of our discount rates, mortality and expected rates of return on our pension plan assets and estimates we make in evaluating our asset retirement obligations. These estimates and assumptions affect the amounts we report in our financial statements and accompanying notes. Our actual results could differ from these estimates. Variances could result in a material effect on our financial condition and results of operations in future periods.
Contracts and Revenue Recognition	Contracts and Revenue Recognition We generally recognize contract revenues and related costs over time for individual performance obligations based on a cost-to-cost method in accordance with FASB Topic Revenue from Contracts with Customers. We recognize estimated contract revenue and resulting income based on the measurement of the extent of progress toward completion as a percentage of the total project. Certain costs may be excluded from the cost-to-cost method of measuring progress, such as significant costs for uninstalled materials, if such costs do not depict our performance in transferring control of goods or services to the customer. We review contract price and cost estimates periodically as the work progresses and reflect adjustments proportionate to the percentage-of-completion in income in the period when those estimates are revised. Certain of our contracts recognize revenue at a point in time, and revenue on these contracts is recognized when control transfers to the customer. The majority of our revenue that is recognized at a point in time is related to parts and certain medical radioisotopes and radiopharmaceuticals in our Commercial Operations segment. For all contracts, if a current estimate of total contract cost indicates a loss on a contract, the projected loss is recognized in full when determined. See Note 3 for a further discussion of revenue recognition.
Stock-Based Compensation	Stock-Based Compensation We expense stock-based compensation in accordance with FASB Topic Compensation – Stock Compensation. Under this topic, the fair value of equity-classified awards, such as restricted stock, performance shares and stock options, is determined on the date of grant and is not remeasured. The fair value of liability-classified awards, such as cash-settled stock appreciation rights, restricted stock units and performance units, is determined on the date of grant and is remeasured at the end of each reporting period through the date of settlement. Grant date fair values for restricted stock, restricted stock units, performance shares and performance units are determined using the closing price of our common stock on the date of grant. Under the provisions of this FASB topic, we recognize expense for all share-based awards granted on a straight-line basis over the requisite service periods of the awards, which is generally equivalent to the vesting term. This topic requires compensation expense to be recognized such that compensation expense is recorded only for those awards expected to vest. As a result, we periodically review the amount of actual forfeitures and record any adjustments deemed necessary each reporting period. We also recognize excess tax benefits in our provision for income taxes. These excess tax benefits result from tax deductions in excess of the cumulative compensation expense recognized for options exercised and other equity-classified awards.
Grant Accounting	Grant Accounting We recognize amounts related to grants as a reduction of expense in the period in which the related costs for which the grants are intended to compensate are recognized and we are reasonably assured to receive payment.
Research and Development	Research and Development Our research and development activities are related to the development and improvement of new and existing products and equipment, as well as conceptual and engineering evaluation for translation into practical applications. Research and development costs are expensed as incurred, unless these costs relate to customer-sponsored activities where we are reimbursed in accordance with the terms of the underlying contracts. Amounts expensed as incurred for company-funded research and development projects are included in Research and development costs. Costs related to contracts with customers for customer-sponsored research and development projects are included as a contract cost in Cost of operations whereby we recognize revenue, consistent with our revenue recognition policies. Additionally, we may enter into cost-sharing arrangements with our customers to enhance our internal development capabilities and offset a portion of the costs incurred related to these development efforts.
Capitalization of Interest Cost	Capitalization of Interest CostWe capitalize interest in accordance with FASB Topic Interest.
Income Taxes	Income Taxes Income tax expense for federal, foreign, state and local income taxes is calculated on pre-tax income based on current tax law and includes the cumulative effect of any changes in tax rates from those used previously in determining deferred tax assets and liabilities. We record a valuation allowance to reduce our deferred tax assets to the amount that is more likely than not to be realized. We assess deferred taxes and the adequacy of the valuation allowance on a quarterly basis. In the ordinary course of business, there is inherent uncertainty in quantifying our income tax positions. We assess our income tax positions and record tax benefits for all years subject to examination based upon management's evaluation of the facts, circumstances and information available at the reporting date. For those tax positions where it is more likely than not that a tax benefit will be sustained, we have recorded the largest amount of tax benefit with a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is not more likely than not that a tax benefit will be sustained, no tax benefit has been recognized in the financial statements. We record interest and penalties (net of any applicable tax benefit) related to income taxes as a component of Provision for Income Taxes on our consolidated statements of income. We would be subject to withholding taxes if we were to distribute earnings from certain foreign subsidiaries, and unrecognized deferred income tax liabilities, including withholding taxes, would be payable upon distribution of these earnings. We consider the earnings of our non-U.S. subsidiaries to be permanently reinvested.
Earnings Per Share	Earnings Per Share We have computed earnings per common share on the basis of the weighted-average number of common shares, and, where dilutive, common share equivalents, outstanding during the indicated periods. We issue a number of forms of stock-based compensation periodically, including incentive and non-qualified stock options, restricted stock, restricted stock units, performance shares and performance units, subject to satisfaction of specific performance goals. We include the shares applicable to these plans in our computation of diluted earnings per share when related performance criteria have been met.
Cash and Cash Equivalents and Restricted Cash	Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Our cash equivalents are highly liquid investments with maturities of three months or less when we purchase them. We record cash and cash equivalents as restricted when we are unable to freely use such cash and cash equivalents for our general operating purposes.
Investments	Investments Our investment portfolio consists primarily of U.S. Government securities, corporate bonds and mutual funds. Our debt securities are carried at fair value and are either classified as trading, with unrealized gains and losses reported in earnings, or as available-for-sale, with the unrealized gains and losses, net of tax, reported as a component of Accumulated other comprehensive income. Our equity securities are carried at fair value with the unrealized gains and losses reported in earnings. We classify investments available for current operations in the consolidated balance sheets as current assets, while we classify investments held for long-term purposes as noncurrent assets. We adjust the amortized cost of debt securities for amortization of premiums and accretion of discounts to maturity, and such adjustments are included in Interest income. We include realized gains and losses on our investments in Other – net. The cost of securities sold is based on the specific identification method. We include interest on investments in Interest income.
Inventories	InventoriesWe carry our inventory at the lower of cost or net realizable value using either the weighted-average or first-in, first-out methods.
Property, Plant and Equipment	Property, Plant and Equipment We carry our property, plant and equipment at depreciated cost, less any impairment provisions. We depreciate our property, plant and equipment using the straight-line method over estimated economic useful lives of eight to 40 years for buildings and three to 14 years for machinery and equipment. Our depreciation expense was $61.3 million, $58.1 million and $50.3 million for the years ended December 31, 2022, 2021 and 2020, respectively. We expense the costs of maintenance, repairs and renewals that do not materially prolong the useful life of an asset as we incur them.
Goodwill	Goodwill Goodwill represents the excess of the cost of our acquired businesses over the fair value of the net assets acquired. We perform testing of goodwill for impairment annually or more frequently whenever events or circumstances indicate the carrying value of goodwill may be impaired. We may elect to perform a qualitative test when we believe that there is sufficient excess fair value over carrying value based on our most recent quantitative assessment, adjusted for relevant events and circumstances that could affect fair value during the current year. If we conclude based on this assessment that it is more likely than not that the reporting unit is not impaired, we do not perform a quantitative impairment test. In all other circumstances, we compare the fair value of a reporting unit to its carrying amount, including goodwill. If the fair value of the reporting unit exceeds its carrying value, no impairment charge is recorded. If the carrying amount of a reporting unit exceeds its fair value, an impairment charge is recorded to goodwill in the amount by which carrying value exceeds fair value.
Investments in Unconsolidated Affiliates	Investments in Unconsolidated Affiliates We use the equity method of accounting for affiliates in which we are able to exert significant influence. Currently, all of our material investments in affiliates that are not consolidated are recorded using the equity method. Affiliates in which we are unable to exert significant influence are carried at fair value.
Intangible Assets	Intangible AssetsIntangible assets are recognized at fair value when acquired. Intangible assets with definite lives are amortized to Costs and Expenses using the straight-line method over their estimated useful lives and tested for impairment when events or changes in circumstances indicate that their carrying amounts may not be recoverable. Intangible assets with indefinite lives are not amortized and are subject to annual impairment testing. We may elect to perform a qualitative assessment when testing indefinite-lived intangible assets for impairment to determine whether events or circumstances affecting significant inputs related to the most recent quantitative evaluation have occurred, indicating that it is more likely than not that the indefinite-lived intangible asset is impaired. Otherwise, we test indefinite-lived intangible assets for impairment by quantitatively determining the fair value of the indefinite-lived intangible asset and comparing the fair value of the intangible asset to its carrying amount. If the carrying amount of the intangible asset exceeds its fair value, we recognize impairment for the amount of the difference.
Leases	Leases We lease certain manufacturing facilities, office space and equipment under operating leases with terms of one to 20 years. Certain of the leases include options to renew for periods of one to 10 years. We include lease options in our determination of the right-of-use asset and lease liability if it is reasonably certain that we will exercise one or more of the options. Leases with initial terms of 12 months or less are excluded from our right-of-use assets and lease liabilities. Our right-of-use assets are included in Other Assets on our consolidated balance sheets. Our current lease liabilities are included in Accrued liabilities – other, and our noncurrent lease liabilities are included in Other Liabilities on our consolidated balance sheets. We use discount rates based on our incremental borrowing rate as most of our leases do not provide an implicit rate that can be readily determined.
Warranty Expense	Warranty Expense We accrue estimated warranty expense, included in Cost of operations on our consolidated statements of income, to satisfy contractual warranty requirements when we recognize the associated revenue on the related contracts. In addition, we record specific provisions or reductions where we expect the actual warranty costs to significantly differ from the accrued estimates. Such changes could have a material effect on our consolidated financial condition, results of operations and cash flows. Included in Accrued liabilities – other on our consolidated balance sheets were accrued warranty expenses totaling $6.6 million and $5.3 million at December 31, 2022 and 2021, respectively.
Deferred Debt Issuance Costs	Deferred Debt Issuance CostsWe have included deferred debt issuance costs in the consolidated balance sheets as a direct deduction from the carrying amount of our debt liability. We amortize deferred debt issuance costs as interest expense over the life of the related debt.
Pension Plans and Postretirement Benefits	Pension Plans and Postretirement Benefits We sponsor various defined benefit pension and postretirement benefit plans covering certain employees of our U.S. and Canadian subsidiaries. We utilize actuarial valuations to calculate the cost and benefit obligations of our pension and postretirement benefits. The actuarial valuations utilize significant assumptions in the determination of our benefit cost and obligations, including assumptions regarding discount rates, expected returns on plan assets, mortality and health care cost trends. We determine our discount rate based on a yield curve comprising rates of return on high-quality, fixed-income investments currently available and expected to be available during the period to maturity of our pension and postretirement benefit plan obligations. The expected rate of return on plan assets assumption is based on capital market assumptions of the long-term expected returns for the investment mix of assets currently in the portfolio. The expected rate of return on plan assets is determined to be the weighted-average of the nominal returns based on the weightings of the classes within the total asset portfolio. Expected health care cost trends represent expected annual rates of change in the cost of health care benefits and are estimated based on analysis of health care cost inflation. The components of benefit cost related to service cost, interest cost, expected return on plan assets and prior service cost amortization are recorded on a quarterly basis based on actuarial assumptions. In the fourth quarter of each year, or as interim remeasurements are required, we immediately recognize net actuarial gains and losses in earnings as a component of net periodic benefit cost. Recognized net actuarial gains and losses consist primarily of our reported actuarial gains and losses and the difference between the actual return on plan assets and the expected return on plan assets. We recognize the funded status of each plan as either an asset or a liability in the consolidated balance sheets. The funded status is the difference between the fair value of plan assets and the present value of its benefit obligation, determined on a plan-by-plan basis. Our pension plan assets can include assets that are difficult to value.
Asset Retirement Obligations and Environmental Clean-up Costs	Asset Retirement Obligations and Environmental Cleanup Costs We accrue for future decommissioning of our nuclear facilities that will permit the release of these facilities to unrestricted use at the end of each facility's service life, which is a requirement of our licenses from the U.S. Nuclear Regulatory Commission ("NRC") and the Canadian Nuclear Safety Commission ("CNSC"). In accordance with the FASB Topic Asset Retirement and Environmental Obligations, we record the fair value of a liability for an asset retirement obligation in the period in which it is incurred. When we initially record such a liability, we capitalize a cost by increasing the carrying amount of the related long-lived asset. When we acquire a business that has an asset retirement obligation, the asset retirement obligation is recognized at fair value without a corresponding increase to the related long-lived asset. Over time, the liability is accreted to its present value each period and the capitalized cost is depreciated over the useful life of the related asset. Upon settlement of a liability, we will settle the obligation for its recorded amount or incur a gain or loss. This topic applies to environmental liabilities associated with assets that we currently operate and are obligated to remove from service. For environmental liabilities associated with assets that we no longer operate, we have accrued amounts based on the estimated costs of cleanup activities for which we are responsible, net of any cost-sharing arrangements. We adjust the estimated costs as further information develops or circumstances change. Given the long-lived nature of these facilities, we are required to estimate retirement costs that will be incurred in the future, which may extend up to 40 years at the time the asset retirement obligation is established. Due to the significance of the remaining useful life of these facilities, the timing of retirement and future costs for material components of the asset retirement obligations, such as labor and waste disposal fees, could differ from our estimates. An exception to this accounting treatment relates to the work we perform for two facilities for which the U.S. Government is obligated to pay substantially all of the decommissioning costs. Substantially all of our asset retirement obligations relate to the remediation of our nuclear analytical laboratory at our facility in Lynchburg, Virginia and the Nuclear Fuel Services, Inc. ("NFS") facility in our Government Operations segment as well as certain facilities in our Commercial Operations segment.
Self-Insurance	Self-InsuranceWe have a wholly owned insurance subsidiary that provides employer's liability, general and automotive liability and primary workers' compensation insurance and, from time to time, builder's risk insurance (within certain limits) to our companies. We may also, in the future, have this insurance subsidiary accept other risks that we cannot or do not wish to transfer to outside insurance companies.
Loss Contingencies	Loss Contingencies We accrue liabilities for loss contingencies when it is probable that a liability has been incurred and the amount of loss is reasonably estimable. We provide disclosure when there is a reasonable possibility that the ultimate loss will exceed the recorded provision or if such probable loss is not reasonably estimable. Due to the nature of our business, we are, from time to time, involved in investigations, litigation, disputes or claims related to our business activities, as discussed in Note 10. Our losses are typically resolved over long periods of time and are often difficult to assess and estimate due to, among other reasons, the possibility of multiple actions by third parties; the attribution of damages, if any, among multiple defendants; plaintiffs, in most cases involving personal injury claims, do not specify the amount of damages claimed; the discovery process may take multiple years to complete; during the litigation process, it is common to have multiple complex unresolved procedural and substantive issues; the potential availability of insurance and indemnity coverages; the wide-ranging outcomes reached in similar cases, including the variety of damages awarded; the likelihood of settlements for de minimis amounts prior to trial; the likelihood of success at trial; and the likelihood of success on appeal. Consequently, it is possible future earnings could be affected by changes in our assessments of the probability that a loss has been incurred in a material pending litigation against us and/or changes in our estimates related to such matters.
Foreign Currency Translation	Foreign Currency Translation We translate assets and liabilities of our foreign operations into U.S. dollars at current exchange rates, and we translate income statement items at average exchange rates for the periods presented. We record adjustments resulting from the translation of foreign currency financial statements as a component of Accumulated other comprehensive income. We report foreign currency transaction gains and losses in income. We have included in Other – net translation gains (losses) of $(1.4) million, $1.8 million and $(0.6) million for the years ended December 31, 2022, 2021 and 2020, respectively.
Derivative Financial Instruments	Derivative Financial Instruments Our operations give rise to exposure to market risks from changes in foreign currency exchange ("FX") rates. We use derivative financial instruments, primarily FX forward contracts, to reduce the impact of changes in FX rates on our operating results. We use these instruments to hedge our exposure associated with revenues or costs on our long-term contracts and other transactions that are denominated in currencies other than our operating entities' functional currencies. We do not hold or issue derivative financial instruments for trading or other speculative purposes. We enter into derivative financial instruments primarily as hedges of certain firm purchase and sale commitments and loans between subsidiaries denominated in foreign currencies. We record these contracts at fair value on our consolidated balance sheets. Based on the hedge designation at inception of the contract, the related gains and losses on these contracts are deferred in stockholders' equity as a component of Accumulated other comprehensive income until the hedged item is recognized in earnings. The gain or loss on a derivative instrument not designated as a hedging instrument is immediately recognized in earnings. Gains and losses on derivative financial instruments that require immediate recognition are included as a component of Other – net on our consolidated statements of income and are recorded in the statements of cash flows based on the nature and use of the instruments. We have designated the majority of our FX forward contracts that qualify for hedge accounting as cash flow hedges. The hedged risk is the risk of changes in functional-currency-equivalent cash flows attributable to changes in FX spot rates of forecasted transactions primarily related to long-term contracts. We exclude from our assessment of effectiveness the portion of the fair value of the FX forward contracts attributable to the difference between FX spot rates and FX forward rates. At December 31, 2022, we had deferred approximately $0.1 million of net gains on these derivative financial instruments. Assuming market conditions continue, we expect to recognize the majority of this amount in the next 12 months. For the years ended December 31, 2022, 2021 and 2020, we recognized (gains) losses of $(27.1) million, $(0.1) million and $8.7 million, respectively, in Other – net on our consolidated statements of income associated with FX forward contracts not designated as hedging instruments. At December 31, 2022, our derivative financial instruments consisted of FX forward contracts with a total notional value of $438.8 million with maturities extending to December 2024. These instruments consisted primarily of FX forward contracts to purchase or sell Canadian dollars and Euros. We are exposed to credit-related losses in the event of non-performance by counterparties to derivative financial instruments. We attempt to mitigate this risk by using major financial institutions with high credit ratings. Our counterparties to derivative financial instruments have the benefit of the same collateral arrangements and covenants as described under our Credit Facility.
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards There were no accounting standards adopted during the year ended December 31, 2022 that had a significant impact on our financial position, results of operations, cash flows or disclosures. New Accounting Standards In October 2021, the FASB issued an update to the Topic Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. This update requires entities to recognize and measure contract assets and liabilities acquired in a business combination in accordance with FASB Topic Revenue from Contracts with Customers. The update will generally result in an entity recognizing contract assets and liabilities at amounts consistent with those recorded by the acquiree immediately before the acquisition date rather than at fair value. The new standard is effective on a prospective basis for fiscal years beginning after December 15, 2022, with early adoption permitted. We are currently evaluating the impact, if any, of the adoption of this standard on our financial statements.

Pension Plans and Postretirement Benefits - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 11,800	$ 12,400	$ 11,300
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	11,116	11,667	10,650
Interest cost	30,924	27,170	37,199
Expected return on plan assets	(83,254)	(81,778)	(77,298)
Amortization of prior service cost	3,257	3,097	3,370
Recognized net actuarial loss (gain)	52,202	(34,690)	6,829
Net periodic benefit cost (income)	14,245	(74,534)	(19,250)
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	650	760	642
Interest cost	1,387	1,197	1,612
Expected return on plan assets	(2,974)	(2,891)	(2,691)
Amortization of prior service cost	26	(178)	(193)
Recognized net actuarial loss (gain)	(5,616)	(4,876)	(458)
Net periodic benefit cost (income)	$ (6,527)	$ (5,988)	$ (1,088)

Basis of Presentation and Significant Accounting Policies - Leases (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
2023	$ 4,546
2024	3,647
2025	3,026
2026	2,426
2027	1,609
Thereafter	15,824
Total lease payments	31,078
Less: Interest	(8,673)
Present value of lease liabilities	22,405
Current lease liabilities	4,400
Operating lease, right-of-use asset	$ 49,600
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities – other
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities

Equity Method Investments (Tables)

12 Months Ended

Dec. 31, 2022

Equity Method Investments and Joint Ventures [Abstract]

Summary of Combined Balance Sheet Information

The following tables summarize combined balance sheet and income statement information for investments accounted for under the equity method:


	December 31,
	2022		2021
	(In thousands)
Current assets	$	566,076	$	546,233
Noncurrent assets	445		634
Total Assets	$	566,521	$	546,867
Current liabilities	$	292,081	$	284,821
Owners' equity	274,440		262,046
Total Liabilities and Owners' Equity	$	566,521	$	546,867

Summary of Combined Income Statement Information


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Revenues	$	4,580,032	$	4,254,635	$	3,980,066
Gross profit	$	176,592	$	159,935	$	142,709
Net income	$	173,339	$	156,994	$	139,988

Reconciliation of Net Income to Equity in Income

Reconciliations of net income per combined income statement information of our investees to equity in income of investees per our consolidated statements of income are as follows:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Equity income based on stated ownership percentages	$	46,784	$	31,870	$	27,266
GAAP and other adjustments	(811)		1,628		(114)
Equity in income of investees	$	45,973	$	33,498	$	27,152

Schedule of Transactions with Unconsolidated Affiliates

Our transactions with unconsolidated affiliates were as follows:


	Year Ended December 31,
	2022		2021		2020
	(In thousands)
Sales to	$	19,857	$	11,838	$	12,186
Dividends received	$	42,512	$	20,475	$	25,005
Capital contributions, net of returns	$	11,450	$	—	$	(88)

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period	$ 0	$ 5,852	$ 3,899
Increases based on tax positions taken in the current year	0	964	2,075
Increases based on tax positions taken in the prior years	0	0	0
Decreases based on tax positions taken in the prior years	0	0	0
Decreases due to settlements with tax authorities	0	(6,775)	0
Decreases due to lapse of applicable statute of limitation	0	(41)	(123)
Other, net	0	0	1
Balance at end of period	$ 0	$ 0	$ 5,852

Stock-Based Compensation

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

STOCK-BASED COMPENSATION

BWX Technologies, Inc. 2020 Omnibus Incentive Plan

In May 2020, our stockholders approved the 2020 Omnibus Incentive Plan (the "2020 Plan") which succeeded the 2010 Long-Term Incentive Plan of BWX Technologies, Inc. (the "2010 Plan"). Members of the Board of Directors, executive officers, key employees and consultants are eligible to participate in the 2020 Plan. The Compensation Committee of the Board of Directors selects the participants for the 2020 Plan. The 2020 Plan provides for cash awards and equity-based compensation in the form of stock options, restricted stock, restricted stock units, performance shares and performance units, subject to satisfaction of specific performance goals. Shares subject to awards under either the 2020 Plan or the 2010 Plan that are cancelled, forfeited, terminated or expire unexercised, shall immediately become available for the granting of awards under the 2020 Plan. As of the effective date of the 2020 Plan, shares available for grant under the 2010 Plan are available for grant under the 2020 Plan. In addition, our stockholders approved an additional 1,450,000 shares of common stock for issuance through the 2020 Plan. Options to purchase shares are granted at not less than 100% of the fair market value closing price on the date of grant, become exercisable at such time or times as determined when granted and expire not more than ten years after the date of grant.

At December 31, 2022, we had a total of 3,720,491 shares of our common stock available for future awards. In the event of a change in control of the Company, the terms of the awards under the 2020 Plan contain provisions that may cause restrictions to lapse and accelerate the vesting of awards.

2010 Long-Term Incentive Plan of BWX Technologies, Inc.

Members of the Board of Directors, executive officers, key employees and consultants were eligible to participate in the 2010 Plan prior to it being succeeded by the 2020 Plan. The Compensation Committee of the Board of Directors selected the participants for the 2010 Plan. The 2010 Plan provided for a number of forms of stock-based compensation, including incentive and non-qualified stock options, restricted stock, restricted stock units, performance shares and performance units, subject to satisfaction of specific performance goals. Shares subject to award under the 2010 Plan that are cancelled, forfeited, terminated or expire unexercised, shall immediately become available for the granting of awards under the 2020 Plan. As part of the approval of the 2010 Plan, 10,000,000 shares of common stock were initially authorized for issuance, with an additional 2,300,000 authorized for issuance in 2014. Options to purchase shares are granted at not less than 100% of the fair market value closing price on the date of grant, become exercisable at such time or times as determined when granted and expire not more than ten years after the date of grant.

Long-Term Incentive Plan of BWXT Technical Services Group, Inc.

In June 2012, we established the 2012 Long-Term Incentive Plan of BWXT Technical Services Group, Inc., a cash-settled plan for employees of certain subsidiaries and unconsolidated affiliates as selected by the plan committee. The cash-settled plan provides for a number of forms of stock-based compensation, including stock appreciation rights, restricted stock units and performance units, subject to satisfaction of specific performance goals. Stock appreciation rights are granted at not less than 100% of the fair market value closing price of a share of BWXT common stock on the date of grant, become exercisable at such time or times as determined when granted and expire not more than ten years after the date of grant. Stock appreciation rights are cash settled for the excess of the market price of BWXT common stock on the exercise date minus the exercise price. Restricted stock units and performance units are cash settled upon vesting as determined when granted. We will not issue any shares of BWXT common stock under this plan, as all awards are cash settled.

In the event of a change in control of the Company, the terms of the awards under the cash-settled plan contain provisions that may cause restrictions to lapse and accelerate the vesting of awards.

Stock-based compensation expense for all of our plans recognized for the years ended December 31, 2022, 2021 and 2020 totaled $14.6 million, $18.3 million and $16.8 million, respectively, with associated tax benefit totaling $2.3 million, $3.0 million and $2.7 million, respectively.

As of December 31, 2022, unrecognized estimated compensation expense related to nonvested awards was $13.5 million, which is expected to be recognized over a weighted-average period of 1.8 years.

Stock Options

The following table summarizes activity for our stock options for the year ended December 31, 2022 (share data in thousands):


	Number of Shares	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (In millions)
Outstanding at beginning of period	125	$	23.65
Granted	—	N/A
Exercised	(35)	$	23.71
Cancelled/expired/forfeited	—	N/A
Outstanding at end of period	90	$	23.62	2.0 years	$	3.1
Exercisable at end of period	90	$	23.62	2.0 years	$	3.1

The aggregate intrinsic value included in the table above represents the total pre-tax intrinsic value that would have been received by the option holders had all option holders exercised their options on December 31, 2022. The intrinsic value is calculated as the total number of option shares multiplied by the difference between the closing price of our common stock on the last trading day of the period and the exercise price of the options. This amount changes based on the price of our common stock.

During the years ended December 31, 2022, 2021 and 2020, the total intrinsic value of stock options exercised was $1.2 million, $2.7 million and $4.7 million, respectively. The actual tax benefits realized related to the stock options exercised during the year ended December 31, 2022 totaled $0.2 million.

Performance Shares

Nonvested performance shares as of December 31, 2022 and changes during the year ended December 31, 2022 were as follows (share data in thousands):


	Number of Shares	Weighted- Average Grant Date Fair Value
Nonvested at beginning of period	545	$	55.90
Adjustment to assumed vesting percentage	18	$	47.90
Granted	202	$	45.62
Vested	(176)	$	51.80
Cancelled/forfeited	(79)	$	53.79
Nonvested at end of period	510	$	53.01

The actual number of shares in which each participant vests is contingent upon achievement of a mix of certain targets (depending on the grant year), including return on invested capital; earnings before interest, taxes, depreciation and amortization; total shareholder return and diluted earnings per share, over a three-year performance period. The number of shares in which participants can vest ranges from zero to 200% of the initial performance shares granted, to be determined upon completion of the three-year performance period. The nonvested shares at the end of the period in the table above assumes weighted-average vesting of 123%.

The actual tax benefits realized related to the performance shares vested during the year ended December 31, 2022 totaled $1.6 million.

Restricted Stock Units

Nonvested restricted stock units as of December 31, 2022 and changes during the year ended December 31, 2022 were as follows (share data in thousands):


	Number of Shares	Weighted- Average Grant Date Fair Value
Nonvested at beginning of period	221	$	57.66
Granted	191	$	46.33
Vested	(124)	$	55.49
Cancelled/forfeited	(46)	$	52.59
Nonvested at end of period	242	$	50.79

The actual tax benefits realized related to the restricted stock units vested during the year ended December 31, 2022 totaled $1.3 million.

Cash-Settled Stock Appreciation Rights

The following table summarizes activity for our stock appreciation rights for the year ended December 31, 2022 (unit data in thousands):


	Number of Units	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (In millions)
Outstanding at beginning of period	27	$	23.62
Granted	—	N/A
Exercised	(10)	$	23.62
Cancelled/expired/forfeited	—	N/A
Outstanding at end of period	17	$	23.62	2.2 years	$	0.6
Exercisable at end of period	17	$	23.62	2.2 years	$	0.6

The aggregate intrinsic value included in the table above represents the total pre-tax intrinsic value that would have been received by the stock appreciation rights holders had all holders exercised their rights on December 31, 2022. The intrinsic value is calculated as the total number of stock appreciation rights multiplied by the difference between the closing price of our common stock on the last trading day of the period and the exercise price of the stock appreciation rights. This amount changes based on the price of our common stock.

Cash-Settled Performance Units

The actual number of units in which each participant vests is dependent upon achievement of certain return on invested capital and diluted earnings per share targets over a three-year performance period. The number of units in which participants can vest ranges from zero to 200% of the initial performance units granted, to be determined upon completion of the three-year performance period.

As of December 31, 2022, we had 6,353 nonvested units valued at $58.08 per share with an assumed weighted-average vesting of 123%. The fair value is based on our closing stock price as of December 31, 2022 and is re-determined at the end of each reporting period for purposes of remeasuring compensation expense associated with these cash-settled awards.

Cash-Settled Restricted Stock Units

As of December 31, 2022, we had 2,394 nonvested units valued at $58.08 per share. The fair value is based on our closing stock price as of December 31, 2022 and is re-determined at the end of each reporting period for purposes of remeasuring compensation expense associated with these cash-settled awards.

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2022
Audit Information [Abstract]
Auditor Name	Deloitte & Touche LLP
Auditor Location	Charlotte, NC
Auditor Firm ID	34

Equity Method Investments - Schedule of Transactions with Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity Method Investments and Joint Ventures [Abstract]
Sales to	$ 19,857	$ 11,838	$ 12,186
Dividends received	42,512	20,475	25,005
Capital contributions, net of returns	$ 11,450	$ 0	$ (88)

Long-Term Debt - Additional Information (Detail)					3 Months Ended	12 Months Ended
Long-Term Debt - Additional Information (Detail)	Oct. 12, 2022 USD ($) fiscalQuarter	Jul. 15, 2021 USD ($)	Apr. 13, 2021 USD ($)	Jun. 12, 2020 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Oct. 11, 2022 USD ($)	May 24, 2018 USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]
Maturity of long-term debt, 2023						$ 6,300,000
Maturity of long-term debt, 2024						6,300,000
Maturity of long-term debt, 2025						12,500,000
Maturity of long-term debt, 2026						12,500,000
Maturity of long-term debt, 2027						462,500,000
Maturities of long-term debt, thereafter						800,000,000
Bonds issued and outstanding						113,500,000
Write-off of deferred financing costs					$ 4,200,000
Letter of Credit
Long-term Debt, Fiscal Year Maturity [Abstract]
Credit agreement, maximum borrowing capacity						34,900,000
Letters of credit outstanding, amount						34,900,000
Senior Notes \| Secured Debt
Long-term Debt, Fiscal Year Maturity [Abstract]
Long-term debt, term loan								$ 400,000,000
Former Credit Facility \| Senior Notes \| Secured Debt
Long-term Debt, Fiscal Year Maturity [Abstract]
Credit agreement, maximum borrowing capacity							$ 750,000,000
Credit Facility
Long-term Debt, Fiscal Year Maturity [Abstract]
Increase in maximum borrowing capacity under certain conditions	$ 400,000,000
Line of credit facility covenant, percentage of EBITDA	100.00%
Maximum leverage ratio required for future credit increase	2.50
Aggregate amount to be borrowed to meet letter of credit requirements						$ 497,500,000
Interest rate on borrowings						5.93%
Credit Facility \| Prime Rate or Canadian Prime Rate \| Minimum
Long-term Debt, Fiscal Year Maturity [Abstract]
Debt instrument, basis spread on variable rate	0.00%
Credit Facility \| Prime Rate or Canadian Prime Rate \| Maximum
Long-term Debt, Fiscal Year Maturity [Abstract]
Debt instrument, basis spread on variable rate	0.75%
Credit Facility \| Base Rate
Long-term Debt, Fiscal Year Maturity [Abstract]
Debt instrument, basis spread on variable rate						0.50%
Credit Facility \| Eurocurrency Rate
Long-term Debt, Fiscal Year Maturity [Abstract]
Debt instrument, basis spread on variable rate						1.50%
Credit Facility \| Eurocurrency Rate \| Minimum
Long-term Debt, Fiscal Year Maturity [Abstract]
Debt instrument, basis spread on variable rate	1.00%
Credit Facility \| Eurocurrency Rate \| Maximum
Long-term Debt, Fiscal Year Maturity [Abstract]
Debt instrument, basis spread on variable rate						1.75%
Credit Facility \| Secured Overnight Financing Rate (SOFR)
Long-term Debt, Fiscal Year Maturity [Abstract]
Debt instrument, basis spread on variable rate	0.10%
Credit Facility \| Secured Debt
Long-term Debt, Fiscal Year Maturity [Abstract]
Number of fiscal quarters \| fiscalQuarter	4
Maximum leverage ratio	4.00
Maximum leverage ration after material acquisition	4.50
Minimum interest coverage ratio	3.00
Credit Facility \| Performance Letter of Credit \| Minimum
Long-term Debt, Fiscal Year Maturity [Abstract]
Letter of credit fee	0.75%
Credit Facility \| Performance Letter of Credit \| Maximum
Long-term Debt, Fiscal Year Maturity [Abstract]
Letter of credit fee	1.05%
Credit Facility \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Commitment fee on unused portions of credit agreement, variable range						0.20%
Credit facility, aggregate borrowings outstanding						$ 250,000,000
Credit Facility \| Senior Notes \| Minimum
Long-term Debt, Fiscal Year Maturity [Abstract]
Commitment fee on unused portions of credit agreement, variable range	0.15%
Credit Facility \| Senior Notes \| Maximum
Long-term Debt, Fiscal Year Maturity [Abstract]
Commitment fee on unused portions of credit agreement, variable range	0.225%
Credit Facility \| Senior Notes \| Line of Credit
Long-term Debt, Fiscal Year Maturity [Abstract]
Credit agreement, maximum borrowing capacity	$ 750,000,000
Credit Facility \| Letter of Credit
Long-term Debt, Fiscal Year Maturity [Abstract]
Credit facility, aggregate borrowings outstanding						$ 2,500,000
Credit Facility \| Letter of Credit \| Minimum
Long-term Debt, Fiscal Year Maturity [Abstract]
Letter of credit fee	1.00%
Credit Facility \| Letter of Credit \| Maximum
Long-term Debt, Fiscal Year Maturity [Abstract]
Letter of credit fee	1.75%
Credit Facility \| Letter of Credit \| Base Rate
Long-term Debt, Fiscal Year Maturity [Abstract]
Letter of credit fee						0.90%
Credit Facility \| Letter of Credit \| Eurocurrency Rate
Long-term Debt, Fiscal Year Maturity [Abstract]
Letter of credit fee						1.50%
Term Loan \| Senior Notes \| Term One
Long-term Debt, Fiscal Year Maturity [Abstract]
Stated interest rate percentage of senior notes	0.625%
Term Loan \| Senior Notes \| Term Two
Long-term Debt, Fiscal Year Maturity [Abstract]
Stated interest rate percentage of senior notes	1.25%
Term Loan \| Senior Notes \| Secured Debt
Long-term Debt, Fiscal Year Maturity [Abstract]
Long-term debt, term loan	$ 250,000,000
Credit facility, aggregate borrowings outstanding	$ 250,000,000
Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Stated interest rate percentage of senior notes								5.375%
Senior Notes Due 2028 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Long-term debt, term loan				$ 400,000,000
Stated interest rate percentage of senior notes				4.125%
Redemption price percentage				100.00%
Senior Notes Due 2026 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Premium for early redemption of senior notes		$ 10,800,000
Write-off of deferred financing costs		$ 4,200,000
Senior Notes Due 2029 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Long-term debt, term loan			$ 400,000,000
Stated interest rate percentage of senior notes			4.125%
Debt Instrument, Redemption, Period One \| Senior Notes Due 2028 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Percentage of principal redeemable				40.00%
Redemption price percentage				104.125%
Debt Instrument, Redemption, Period One \| Senior Notes Due 2029
Long-term Debt, Fiscal Year Maturity [Abstract]
Redemption price percentage			100.00%
Debt Instrument, Redemption, Period One \| Senior Notes Due 2029 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Percentage of principal redeemable			40.00%
Redemption price percentage			104.125%
Debt Instrument, Redemption, Period Two \| Senior Notes Due 2028 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Redemption price percentage				102.063%
Debt Instrument, Redemption, Period Two \| Senior Notes Due 2029 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Redemption price percentage			102.063%
Debt Instrument, Redemption, Period Three \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Redemption price percentage		102.688%
Debt Instrument, Redemption, Period Three \| Senior Notes Due 2028 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Redemption price percentage				101.031%
Debt Instrument, Redemption, Period Three \| Senior Notes Due 2029 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Redemption price percentage			101.031%
Debt Instrument, Redemption, Period Four \| Senior Notes Due 2028 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Redemption price percentage				100.00%
Debt Instrument, Redemption, Period Four \| Senior Notes Due 2029 \| Senior Notes
Long-term Debt, Fiscal Year Maturity [Abstract]
Redemption price percentage			100.00%

Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Disaggregated Revenues

We allocate geographic revenues based on the location of the customers' operations. Revenues by geographic area and customer type were as follows:


	Year Ended December 31, 2022				Year Ended December 31, 2021						Year Ended December 31, 2020
	Government Operations		Commercial Operations		Total		Government Operations		Commercial Operations			Total		Government Operations		Commercial Operations		Total
	(In thousands)
United States:
Government	$	1,703,005	$	—	$	1,703,005	$	1,624,078	$	—		$	1,624,078	$	1,635,399	$	—	$	1,635,399
Non-Government	91,653		31,120		122,773		90,421		44,102			134,523		116,356		35,432		151,788
	$	1,794,658	$	31,120	$	1,825,778	$	1,714,499	$	44,102		$	1,758,601	$	1,751,755	$	35,432	$	1,787,187
Canada:
Government	$	79	$	—	$	79	$	—	$	—		$	—	$	—	$	—	$	—
Non-Government	3,134		373,705		376,839		3,417		345,412			348,829		4,357		309,433		313,790
	$	3,213	$	373,705	$	376,918	$	3,417	$	345,412		$	348,829	$	4,357	$	309,433	$	313,790
Other:
Government	$	1,356	$	—	$	1,356	$	—	$	—		$	—	$	—	$	—	$	—
Non-Government	9,256		22,533		31,789		7,181		17,568			24,749		7,015		26,404		33,419
	$	10,612	$	22,533	$	33,145	$	7,181	$	17,568		$	24,749	$	7,015	$	26,404	$	33,419
Segment Revenues	$	1,808,483	$	427,358	2,235,841		$	1,725,097	$	407,082		2,132,179		$	1,763,127	$	371,269	2,134,396
Eliminations					(3,007)							(8,105)						(10,880)
Revenues					$	2,232,834						$	2,124,074					$	2,123,516

Revenues by timing of transfer of goods or services were as follows:


	Year Ended December 31, 2022				Year Ended December 31, 2021						Year Ended December 31, 2020
	Government Operations		Commercial Operations		Total		Government Operations		Commercial Operations			Total		Government Operations		Commercial Operations		Total
	(In thousands)
Over time	$	1,798,388	$	370,198	$	2,168,586	$	1,724,961	$	355,477		$	2,080,438	$	1,763,043	$	322,745	$	2,085,788
Point-in-time	10,095		57,160		67,255		136		51,605			51,741		84		48,524		48,608
Segment Revenues	$	1,808,483	$	427,358	2,235,841		$	1,725,097	$	407,082		2,132,179		$	1,763,127	$	371,269	2,134,396
Eliminations					(3,007)							(8,105)						(10,880)
Revenues					$	2,232,834						$	2,124,074					$	2,123,516

Revenues by contract type were as follows:


	Year Ended December 31, 2022				Year Ended December 31, 2021						Year Ended December 31, 2020
	Government Operations		Commercial Operations		Total		Government Operations		Commercial Operations			Total		Government Operations		Commercial Operations		Total
	(In thousands)
Fixed-Price Incentive Fee	$	1,226,265	$	9,728	$	1,235,993	$	1,244,916	$	9,279		$	1,254,195	$	1,226,748	$	1,578	$	1,228,326
Firm-Fixed-Price	334,076		300,129		634,205		307,652		307,200			614,852		336,496		296,394		632,890
Cost-Plus Fee	244,063		—		244,063		165,519		—			165,519		190,799		—		190,799
Time-and-Materials	4,079		117,501		121,580		7,010		90,603			97,613		9,084		73,297		82,381
Segment Revenues	$	1,808,483	$	427,358	2,235,841		$	1,725,097	$	407,082		2,132,179		$	1,763,127	$	371,269	2,134,396
Eliminations					(3,007)							(8,105)						(10,880)
Revenues					$	2,232,834						$	2,124,074					$	2,123,516

Contract with Customer, Asset and Liability

Retainages also vary as a result of timing differences between incurring costs and achieving milestones that allow us to recover these amounts.


	December 31,		December 31,
	2022		2021
	(In thousands)
Included in Contracts in progress:
Unbilled receivables	$	521,291	$	528,644
Retainages (1)	$	48,566	$	51,507
Advance billings on contracts	$	88,726	$	111,619

(1)At December 31, 2021, we also had noncurrent retainages of $1.3 million included in Other Assets.

Equity Method Investments - Summary of Combined Income Statement Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Net income	$ 238,620	$ 306,288	$ 279,196
Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Revenues	4,580,032	4,254,635	3,980,066
Gross profit	176,592	159,935	142,709
Net income	$ 173,339	$ 156,994	$ 139,988

- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details

Basis of Presentation and Significant Accounting Policies - Estimated Amortization Expense (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Accounting Policies [Abstract]
2023	$ 11,328
2024	11,328
2025	11,328
2026	10,147
2027	$ 8,552

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Investigations and Litigation Due to the nature of our business, we are, from time to time, involved in investigations, litigation, disputes or claims related to our business activities, including, among other things: •performance- or warranty-related matters under our customer and supplier contracts and other business arrangements; and •workers' compensation, employment, premises liability and other claims. Based upon our prior experience, we do not expect that any of these investigations, litigation proceedings, disputes and claims will have a material adverse effect on our consolidated financial condition, results of operations or cash flows. Environmental Matters We have been identified as a potentially responsible party at various cleanup sites under the Comprehensive Environmental Response, Compensation, and Liability Act, as amended ("CERCLA") and other environmental laws. These laws can impose liability for the entire cost of cleanup on any of the potentially responsible parties, regardless of fault or the lawfulness of the original conduct. Generally, however, where there are multiple responsible parties, a final allocation of costs is made based on the amount and type of wastes disposed of by each party and the number of financially viable parties, although this may not be the case with respect to any particular site. We have not been determined to be a major contributor of wastes to any of these sites. On the basis of the relative contribution of waste to each site by potentially responsible parties, as well as the financial solvency of other potentially responsible parties, we expect our share of the ultimate liability for the various sites will not have a material adverse effect on our consolidated financial condition, results of operations or cash flows in any given year. We perform significant amounts of work for the U.S. Government under both prime contracts and subcontracts and operate certain facilities that are licensed to possess and process special nuclear materials. As a result of these activities, we are subject to continuing reviews by governmental agencies, including the U.S. Environmental Protection Agency and the NRC. We are also involved in manufacturing activities at licensed facilities in Canada that are subject to continuing reviews by governmental agencies in Canada, including the CNSC. The NRC's decommissioning regulations require our Government Operations segment to provide financial assurance that it will be able to pay the expected cost of decommissioning its two licensed facilities at the end of their service lives. We provided financial assurance totaling $68.1 million and $61.8 million during the years ended December 31, 2022 and 2021, respectively, with surety bonds for the ultimate decommissioning of these licensed facilities. These facilities have provisions in their government contracts pursuant to which substantially all of our decommissioning costs and financial assurance obligations are covered by the DOE, including the costs to complete the decommissioning projects underway at the facility in Erwin, Tennessee. The surety bonds noted above are to cover decommissioning required pursuant to work not subject to this DOE obligation. In Canada, the CNSC's decommissioning regulations require our Commercial Operations segment to provide financial assurance that it will be able to pay the expected cost of decommissioning its CNSC-licensed facilities at the end of their service lives. We provided financial assurance totaling $43.3 million and $46.4 million during the years ended December 31, 2022 and 2021, respectively, with letters of credit and surety bonds for the ultimate decommissioning of these licensed facilities. Our compliance with federal, foreign, state and local environmental control and protection regulations resulted in pre-tax charges of approximately $20.0 million, $17.5 million and $16.3 million in the years ended December 31, 2022, 2021 and 2020, respectively. In addition, compliance with existing environmental regulations necessitated capital expenditures of $1.6 million, $3.1 million and $1.2 million in the years ended December 31, 2022, 2021 and 2020, respectively. At December 31, 2022 and 2021, we had total environmental accruals (including asset retirement obligations) of $101.8 million and $102.4 million, respectively. Of our total environmental accruals at December 31, 2022 and 2021, $10.8 million and $9.8 million, respectively, were included in current liabilities. Inherent in the estimates of these accruals are our expectations regarding the levels of contamination, decommissioning costs and recoverability from other parties, which may vary significantly as decommissioning activities progress. Accordingly, changes in estimates could result in material adjustments to our operating results, and the ultimate loss may differ materially from the amounts that we have provided for in our consolidated financial statements.

Basis of Presentation and Significant Accounting Policies - Cash and Cash Equivalents and Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Cash and cash equivalents	$ 35,244	$ 33,891
Restricted cash and cash equivalents	2,928	2,896
Restricted cash and cash equivalents included in Other Assets	2,818	2,988
Total cash and cash equivalents and restricted cash and cash equivalents as presented on our consolidated statements of cash flows	$ 40,990	$ 39,775	$ 48,298	$ 92,400

Pension Plans and Postretirement Benefits - Weighted Average Assumptions (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	5.42%	2.91%
Discount rate to determine interest cost	2.42%	1.96%	2.78%
Expected return on plan assets	7.10%	6.80%	6.95%
Other Benefits
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	5.32%	2.85%
Discount rate to determine interest cost	2.42%	1.87%	2.62%
Expected return on plan assets	5.67%	5.66%	5.66%

Earnings Per Share

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

The following table sets forth the computation of basic and diluted earnings per share:


	Year Ended December 31,
	2022		2021		2020
	(In thousands, except shares and per share amounts)
Basic:
Net Income Attributable to BWX Technologies, Inc.	$	238,191	$	305,871	$	278,670
Weighted-average common shares	91,447,088		94,278,894		95,457,193
Basic earnings per common share	$	2.60	$	3.24	$	2.92
Diluted:
Net Income Attributable to BWX Technologies, Inc.	$	238,191	$	305,871	$	278,670
Weighted-average common shares (basic)	91,447,088		94,278,894		95,457,193
Effect of dilutive securities:
Stock options, restricted stock units and performance shares (1)	255,023		239,528		269,304
Adjusted weighted-average common shares	91,702,111		94,518,422		95,726,497
Diluted earnings per common share	$	2.60	$	3.24	$	2.91

(1)At December 31, 2022, 2021 and 2020, we excluded 10,419, 0 and 0 shares, respectively, from our diluted share calculation as their effect would have been antidilutive.

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	325,000,000	325,000,000
Common stock, shares issued (in shares)	127,671,756	127,311,985
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	75,000,000	75,000,000
Preferred stock, shares issued (in shares)	0	0
Treasury stock at cost (in shares)	36,417,480	35,915,747

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
Valuation allowance for deferred tax asset	$ 13,022	$ 13,218
Net operating loss carryforwards, valuation allowance	9,400
Undistributed earnings of subsidiaries	277,200
Unrecognized deferred income tax liabilities	13,900
Federal
Income Tax Contingency [Line Items]
Federal capital losses	9,400
Net operating loss carryforwards, valuation allowance	3,600
Net operating loss carryforwards	4,700
State
Income Tax Contingency [Line Items]
Net operating loss carryforwards, valuation allowance	4,600
Net operating loss carryforwards	$ 5,900

Basis of Presentation and Significant Accounting Policies - Warranty Expense (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Product warranty accrual, current	$ 6.6	$ 5.3

Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:


	Year Ended December 31,
	2022		2021		2020
	(In thousands, except shares and per share amounts)
Basic:
Net Income Attributable to BWX Technologies, Inc.	$	238,191	$	305,871	$	278,670
Weighted-average common shares	91,447,088		94,278,894		95,457,193
Basic earnings per common share	$	2.60	$	3.24	$	2.92
Diluted:
Net Income Attributable to BWX Technologies, Inc.	$	238,191	$	305,871	$	278,670
Weighted-average common shares (basic)	91,447,088		94,278,894		95,457,193
Effect of dilutive securities:
Stock options, restricted stock units and performance shares (1)	255,023		239,528		269,304
Adjusted weighted-average common shares	91,702,111		94,518,422		95,726,497
Diluted earnings per common share	$	2.60	$	3.24	$	2.91

(1)At December 31, 2022, 2021 and 2020, we excluded 10,419, 0 and 0 shares, respectively, from our diluted share calculation as their effect would have been antidilutive.

Basis of Presentation and Significant Accounting Policies - Asset Retirement Obligations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Asset retirement obligations Abstract
Balance at beginning of period	$ 84,132	$ 78,110	$ 77,288
Costs incurred	(1,223)	(215)	(1,608)
Additions/adjustments	(4,289)	0	(3,284)
Accretion	5,158	5,996	5,343
Translation	(1,266)	241	371
Balance at end of period	82,512	84,132	78,110
Current asset retirement obligation	$ 4,700	$ 4,700	$ 2,800