CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents ($91,768 and $105,735 related to variable interest entities (“VIEs”))	$ 318,720	$ 374,289
Restricted cash	82,086	77,563
Restricted investments	74,062	78,912
Accounts receivable ($78,924 and $86,012 related to VIEs)	1,368,892	1,415,063
Retainage receivable ($129,050 and $122,335 related to VIEs)	661,382	648,441
Costs and estimated earnings in excess of billings ($55,315 and $39,846 related to VIEs)	1,255,992	1,236,734
Other current assets ($49,182 and $51,746 related to VIEs)	236,943	249,455
Total current assets	3,998,077	4,080,457
PROPERTY AND EQUIPMENT (“P&E”), net of accumulated depreciation of $452,904 and $434,294 (net P&E of $8,526 and $12,840 related to VIEs)	478,338	489,217
GOODWILL	205,143	205,143
INTANGIBLE ASSETS, NET	116,472	123,115
OTHER ASSETS	147,977	147,685
TOTAL ASSETS	4,946,007	5,045,617
CURRENT LIABILITIES:
Current maturities of long-term debt, net of unamortized discount and debt issuance costs totaling $941 and $2,040	101,020	100,188
Accounts payable ($81,694 and $116,461 related to VIEs)	716,326	794,611
Retainage payable ($28,027 and $26,439 related to VIEs)	318,692	315,135
Billings in excess of costs and estimated earnings ($332,704 and $362,427 related to VIEs)	818,757	839,222
Accrued expenses and other current liabilities ($6,838 and $9,595 related to VIEs)	176,264	215,207
Total current liabilities	2,131,059	2,264,363
LONG-TERM DEBT, less current maturities, net of unamortized discount and debt issuance costs totaling $19,478 and $20,209	924,651	925,277
DEFERRED INCOME TAXES	82,950	82,966
OTHER LONG-TERM LIABILITIES	235,266	230,066
TOTAL LIABILITIES	3,373,926	3,502,672
COMMITMENTS AND CONTINGENCIES (NOTE 11)
Stockholders' equity:
Preferred stock - authorized 1,000,000 shares ($1 par value), none issued	0	0
Common stock - authorized 112,500,000 shares ($1 par value), issued and outstanding 50,937,607 and 50,827,205 shares	50,938	50,827
Additional paid-in capital	1,127,624	1,127,385
Retained earnings	438,419	422,385
Accumulated other comprehensive loss	(47,356)	(46,741)
Total stockholders' equity	1,569,625	1,553,856
Noncontrolling interests	2,456	(10,911)
TOTAL EQUITY	1,572,081	1,542,945
TOTAL LIABILITIES AND EQUITY	$ 4,946,007	$ 5,045,617