Quarterly Financial Data (Unaudited) - Selected Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Sep. 30, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Revenues | $ 885,842 | $ 866,286 | $ 764,039 | $ 682,258 | $ 746,267 | $ 671,956 | $ 681,465 | $ 603,966 | $ 3,198,425 | $ 2,703,654 | $ 2,496,309 |
| Operating income | 92,056 | 113,349 | 102,424 | 96,630 | 92,262 | 96,578 | 98,806 | 92,961 | 404,459 | 380,607 | 383,059 |
| Equity in income of investees | 18,562 | 21,216 | 18,545 | 16,588 | 15,612 | 15,532 | 11,584 | 13,203 | 74,911 | 55,931 | 50,807 |
| Net Income Attributable to BWX Technologies, Inc. | $ 92,989 | $ 82,106 | $ 78,388 | $ 75,462 | $ 71,018 | $ 69,483 | $ 72,972 | $ 68,468 | $ 328,945 | $ 281,941 | $ 245,849 |
| Basic: | |||||||||||
| Net Income Attributable to BWX Technologies, Inc. (USD per share) | $ 1.02 | $ 0.90 | $ 0.86 | $ 0.82 | $ 0.78 | $ 0.76 | $ 0.80 | $ 0.75 | $ 3.59 | $ 3.08 | $ 2.68 |
| Diluted: | |||||||||||
| Net Income Attributable to BWX Technologies, Inc. (USD per share) | $ 1.01 | $ 0.89 | $ 0.85 | $ 0.82 | $ 0.77 | $ 0.76 | $ 0.79 | $ 0.75 | $ 3.58 | $ 3.07 | $ 2.68 |
| Revenues | $ 29,400 | $ 5,544 | $ 37,908 | $ 24,728 | |||||||
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- Definition Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in estimate of transaction price which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due. Includes, but is not limited to, change in assessment of whether estimate of variable consideration is constrained. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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