CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Cash and cash equivalent	$ 202,197	$ 374,289
Accounts receivable	1,454,319	1,415,063
Retainage receivable	568,881	648,441
Costs and estimated earnings in excess of billings	1,356,768	1,236,734
Other current assets	186,773	249,455
Property and equipment, net	429,645	489,217
Unamortized discount and debt issuance costs, current	0	2,040
Accounts payable	512,056	794,611
Retainage payable	268,945	315,135
Billings in excess of costs and estimated earnings	761,689	839,222
Accrued expenses and other current liabilities	210,017	215,207
Unamortized discount and debt issuance costs, non-current	$ 17,109	$ 20,209
Preferred stock, shares authorized	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)	51,095,706	50,827,205
Common stock, shares outstanding (in shares)	51,095,706	50,827,205
Variable Interest Entity, Primary Beneficiary
Cash and cash equivalent	$ 102,679	$ 105,735
Accounts receivable	116,415	86,012
Retainage receivable	162,259	122,335
Costs and estimated earnings in excess of billings	143,105	39,846
Other current assets	43,718	51,746
Property and equipment, net	2,203	12,840
Accounts payable	96,097	116,461
Retainage payable	37,007	26,439
Billings in excess of costs and estimated earnings	355,270	362,427
Accrued expenses and other current liabilities	$ 8,566	$ 9,595