Consolidated Statements of Cash Flows (Tables)

12 Months Ended

Dec. 31, 2020

Supplemental Cash Flow Elements [Abstract]

Changes in Other Components of Working Capital

Below are the changes in other components of working capital, net of balances related to incremental interest acquired in a Civil segment joint venture during 2019 (see Note 12), as shown in the Consolidated Statements of Cash Flows, the supplemental disclosure of cash paid for interest and income taxes and the supplemental disclosure of non-cash investing activities:

	Year Ended December 31,
(in thousands)	2020		2019		2018
(Increase) Decrease in:
Accounts receivable	$	(104,901)	$	(81,983)	$	3,899
Retainage receivable	(85,769)		(78,520)		56,754
Costs and estimated earnings in excess of billings	(113,190)		18,751		(209,537)
Other current assets	(49,468)		(76,146)		15,398
(Decrease) Increase in:
Accounts payable	111,912		53,999		(78,243)
Retainage payable	62,954		35,013		(49,864)
Billings in excess of costs and estimated earnings	(5,168)		245,292		76,703
Accrued expenses and other current liabilities	13,654		14,851		28,046
Changes in other components of working capital	$	(169,976)	$	131,257	$	(156,844)
Cash paid during the year for:
Interest	$	57,038	$	56,137	$	51,063
Income taxes	$	11,204	$	43,374	$	13,652
Supplemental disclosure of non-cash investing activities:
Real property acquired in settlement of a receivable	$	11,660	$	—	$	—