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Contract Assets and Liabilities - Summary of contract assets (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Contractors [Line Items] |  |  |
Unbilled revenue, net | $ 185,707 |  | $ 134,187
Contract retainages, net | 124,722 |  | 90,888
Contract assets, net | 310,429 |  | $ 225,075
Changes in contract assets, net, Change | 74,775 | $ 33,642 |
Change |  |  |
Contractors [Line Items] |  |  |
Unbilled revenue, net, Change | 51,520 |  |
Contract retainages, net, Change | 33,834 |  |
Changes in contract assets, net, Change | $ 85,354 |  |

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