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Revenue Recognition and Related Balance Sheet Accounts - Revenue Disaggregated by Geographic Location and Contract Type (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 6,233,334 | $ 5,031,819
Percent of total revenues (in percent) | 100.00% | 100.00%
United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 5,788,053 | $ 4,569,716
Percent of total revenues (in percent) | 92.90% | 90.80%
Canada |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 210,246 | $ 229,427
Percent of total revenues (in percent) | 3.40% | 4.60%
Australia |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 171,087 | $ 146,029
Percent of total revenues (in percent) | 2.70% | 2.90%
Others |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 63,948 | $ 86,647
Percent of total revenues (in percent) | 1.00% | 1.70%
Fixed price contracts |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 3,755,326 | $ 2,672,315
Percent of total revenues (in percent) | 60.20% | 53.10%
Unit-price contracts |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 1,455,486 | $ 1,427,507
Percent of total revenues (in percent) | 23.40% | 28.40%
Cost-plus contracts |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 1,022,522 | $ 931,997
Percent of total revenues (in percent) | 16.40% | 18.50%

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