CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Cash and cash equivalents	$ 309,267	$ 202,197
Accounts receivable	1,337,017	1,454,319
Retention receivable	552,695	568,881
Costs and estimated earnings in excess of billings	1,372,640	1,356,768
Other current assets	207,881	186,773
Accumulated depreciation	507,400	483,417
Property and equipment, net	427,894	429,645
Accounts payable	555,365	512,056
Retainage payable	227,725	268,945
Billings in excess of costs and estimated earnings	956,735	761,689
Accrued expenses and other current liabilities	192,931	210,017
Unamortized discount and debt issuance costs, non-current	$ 15,575	$ 17,109
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares issued (in shares)	0	0
Common stock, shares authorized (in shares)	112,500,000	112,500,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares issued (in shares)	51,357,691	51,095,706
Common stock, shares outstanding (in shares)	51,357,691	51,095,706
VIEs
Cash and cash equivalents	$ 169,266	$ 102,679
Accounts receivable	99,872	116,415
Retention receivable	178,575	162,259
Costs and estimated earnings in excess of billings	67,874	143,105
Other current assets	42,844	43,718
Property and equipment, net	13,905	2,203
Accounts payable	66,971	96,097
Retainage payable	39,580	37,007
Billings in excess of costs and estimated earnings	458,713	355,270
Accrued expenses and other current liabilities	$ 10,880	$ 8,566