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Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract] |  |  |
Accounts receivable | $ (8,552) | $ (10,089) | $ (7,203)
Contracts in progress, net | 65,963 | (5,188) | (8,288)
Receivables from and equity in construction joint ventures | (7,457) | 1,524 | 659
Other current and non-current assets | (7,861) | 43 | 924
Accounts payable | (42,392) | 10,987 | 1,969
Accrued compensation and other liabilities | 8,260 | (839) | (4,038)
Members' interest subject to mandatory redemption and undistributed earnings | 2,287 | (340) | 1,957
Changes in operating assets and liabilities | $ (10,248) | $ 3,902 | $ 14,020

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