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Contract Assets and Liabilities (Tables)
 3 Months Ended
Mar. 31, 2021
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]  
Schedule of contract assets and liabilities
Contract assets consisted of the following:
(in thousands)March 31,
2021		December 31,
2020		Change
Unbilled revenue, net$108,268 $97,543 $10,725 
Contract retainages, net84,615 88,260 (3,645)
Contract assets, net$192,883 $185,803 $7,080 
Contract liabilities consisted of the following:
(in thousands)March 31,
2021		December 31,
2020		Change
Deferred revenue$138,180 $155,570 $(17,390)
Accrued loss provision2,134 2,826 (692)
Contract liabilities$140,314 $158,396 $(18,082)
The following table provides information about contract assets and contract liabilities from contracts with customers:
(in thousands)March 31,
2021		December 31,
2020		Change
Contract assets, net$192,883 $185,803 $7,080 
Contract liabilities(140,314)(158,396)18,082 
Net contract assets (liabilities)$52,569 $27,407 $25,162 
Schedule of net asset position for contracts in process
The net asset position for contracts in process consisted of the following:
(in thousands)March 31,
2021		December 31,
2020
Costs and estimated earnings on uncompleted contracts$3,705,959 $3,921,376 
Less: billings to date3,735,871 3,979,403 
$(29,912)$(58,027)
The net asset position for contracts in process is included within the contract asset and contract liability in the accompanying consolidated balance sheets as follows:
(in thousands)March 31,
2021		December 31,
2020
Unbilled revenue $108,268 $97,543 
Deferred revenue (138,180)(155,570)
$(29,912)$(58,027)