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v3.24.0.1

Segment Reporting - Schedule of Revenue Information by Products and Service Lines (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 725,515 | $ 589,989 | $ 612,445 | $ 568,360 | $ 624,177 | $ 523,711 | $ 554,208 | $ 530,738 | $ 2,496,309 | $ 2,232,834 | $ 2,124,074
Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2,497,681 | 2,235,841 | 2,132,179
Reportable Segments | Government Operations |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2,031,337 | 1,808,483 | 1,725,097
Reportable Segments | Government Operations | Nuclear Components and Fuel |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,610,183 | 1,494,810 | 1,481,416
Reportable Segments | Government Operations | Uranium Processing and Nuclear Services |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 276,690 | 233,197 | 198,420
Reportable Segments | Government Operations | Advanced Reactor Design and Engineering |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 144,464 | 80,476 | 45,261
Reportable Segments | Commercial Operations |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 466,344 | 427,358 | 407,082
Reportable Segments | Commercial Operations | Nuclear Manufacturing |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 231,944 | 221,458 | 246,444
Reportable Segments | Commercial Operations | Nuclear Services and Engineering |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 234,400 | 205,900 | 160,638
Eliminations |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ (1,372) | $ (3,007) | $ (8,105)

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