Contract Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2019

Contract With Customer Asset And Liability [Abstract]

Component of and Changes in Contract Asset and Liability Balances

The components of the contract asset balances as of the respective dates were as follows (in thousands):

	June 30, 2019		December 31, 2018		June 30, 2018
Costs in excess of billings and estimated earnings	$	161,500	$	120,223	$	161,670
Contract retention		96,150		99,531		103,520
Total contract assets	$	257,650	$	219,754	$	265,190

The components of the contract liability balances as of the respective dates were as follows (in thousands):

	June 30, 2019		December 31, 2018		June 30, 2018
Billings in excess of costs and estimated earnings, net of retention	$	117,029	$	103,250	$	91,147
Provisions for losses		2,260		2,199		717
Total contract liabilities	$	119,289	$	105,449	$	91,864