Contract Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2020

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, 2020		December 31, 2019		Change
Contract assets
Costs in excess of billings and estimated earnings	$	31,894	$	44,315	$	(12,421)
Retainage receivable	35,204		32,873		2,331
Total contract assets	$	67,098	$	77,188	$	(10,090)

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

(in thousands)	December 31, 2020		December 31, 2019		Change
Contract liabilities
Billings in excess of costs and estimated earnings	$	46,020	$	40,662	$	5,358
Provisions for losses	628		1,708		(1,080)
Total contract liabilities	$	46,648	$	42,370	$	4,278

Schedule of Contracts in Progress

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

(in thousands)	December 31, 2020		December 31, 2019
Revenue earned on uncompleted contracts	$	752,564	$	726,215
Less: Billings to date	(766,690)		(722,562)
Net underbilling (overbilling)	$	(14,126)	$	3,653

(in thousands)	December 31, 2020		December 31, 2019
Costs in excess of billings and estimated earnings	$	31,894	$	44,315
Billings in excess of costs and estimated earnings	(46,020)		(40,662)
Net underbilling (overbilling)	$	(14,126)	$	3,653