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Supplemental Cash Flow Information
3 Months Ended
Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information
15.SUPPLEMENTAL CASH FLOW INFORMATION
    Operating Assets and Liabilities—The following table summarizes the changes in the components of operating assets and liabilities:
Three Months Ended March 31,
20212020
Accounts receivable$7,238 $21,026 
Contracts in progress, net(7,921)(12,001)
Receivables from and equity in construction joint ventures(1,513)(1,593)
Other current and non-current assets876 1,242 
Accounts payable12,799 (14,421)
Accrued compensation and other liabilities59 888 
Members' interest subject to mandatory redemption and undistributed earnings325 183 
Changes in operating assets and liabilities$11,863 $(4,676)