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v3.22.4

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)

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