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Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021
Supplemental Cash Flow Elements [Abstract] |  |
Accounts receivable | $ (70,745) | $ (34,105)
Contracts in progress, net | (4,328) | 26,008
Receivables from and equity in construction joint ventures | (14) | (1,358)
Other current and non-current assets | (1,245) | (8,448)
Accounts payable | 18,480 | 38,308
Accrued compensation and other liabilities | 5,711 | 3,936
Members' interest subject to mandatory redemption and undistributed earnings | (3,330) | 3,703
Changes in operating assets and liabilities | $ (55,471) | $ 28,044

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