Contract Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 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):

	March 31, 2019		December 31, 2018		March 31, 2018
Costs in excess of billings and estimated earnings	$	171,083	$	120,223	$	98,115
Contract retention		89,167		99,531		80,548
Total contract assets	$	260,250	$	219,754	$	178,663

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

	March 31, 2019		December 31, 2018		March 31, 2018
Billings in excess of costs and estimated earnings, net of retention	$	88,595	$	103,250	$	70,398
Provisions for losses		2,157		2,199		632
Total contract liabilities	$	90,752	$	105,449	$	71,030