Revenue from Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Components of Contract Asset and Liability Balances

The components of the contract asset balances as of the respective dates were as follows:

(in thousands)	December 31, 2021		December 31, 2020		Change
Contract assets
Costs in excess of billings and estimated earnings	$	47,447	$	31,894	$	15,553
Retainage receivable	36,416		35,204		1,212
Total contract assets	$	83,863	$	67,098	$	16,765

The components of the contract liability balances as of the respective dates were as follows:

(in thousands)	December 31, 2021		December 31, 2020		Change
Contract liabilities
Billings in excess of costs and estimated earnings	$	26,293	$	46,020	$	(19,727)
Provisions for losses	419		628		(209)
Total contract liabilities	$	26,712	$	46,648	$	(19,936)

Schedule of Contracts in Progress

The net underbilling (overbilling) position for contracts in process consisted of the following:

(in thousands)	December 31, 2021		December 31, 2020
Revenue earned on uncompleted contracts	$	758,450	$	752,564
Less: Billings to date	(737,296)		(766,690)
Net underbilling (overbilling)	$	21,154	$	(14,126)

(in thousands)	December 31, 2021		December 31, 2020
Costs in excess of billings and estimated earnings	$	47,447	$	31,894
Billings in excess of costs and estimated earnings	(26,293)		(46,020)
Net underbilling (overbilling)	$	21,154	$	(14,126)

Schedule of Revisions in Contract Estimates

The following table summarizes the Company’s recorded revisions in its contract estimates for certain GCR and ODR projects for the years ended December 31, 2021 and 2020 (includes material gross profit changes of $0.25 million or more).

	For the Years Ended December 31,
	2021			2020
(in thousands except project count )			Project count			Project count
Gross profit write-ups:
GCR	$	5,663	12	$	1,654	3
ODR	—		—	—		—
Total gross profit write-ups	$	5,663	12	$	1,654	3
Gross profit write-downs:
GCR	$	(5,958)	8	$	(10,379)	15
ODR	(332)		1	—		—
Total gross profit write-downs	$	(6,290)	9	$	(10,379)	15
Total gross profit write-downs, net	$	(627)		$	(8,725)