CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents ($72,473 and $105,735 related to variable interest entities (“VIEs”))	$ 187,535	$ 374,289
Restricted cash	6,922	77,563
Restricted investments	86,576	78,912
Accounts receivable ($99,841 and $86,012 related to VIEs)	1,426,709	1,415,063
Retainage receivable ($150,301 and $122,335 related to VIEs)	637,124	648,441
Costs and estimated earnings in excess of billings ($142,587 and $39,846 related to VIEs)	1,388,010	1,236,734
Other current assets ($44,851 and $51,746 related to VIEs)	204,555	249,455
Total current assets	3,937,431	4,080,457
PROPERTY AND EQUIPMENT (“P&E”), net of accumulated depreciation of $477,556 and $434,294 (net P&E of $2,413 and $12,840 related to VIEs)	440,982	489,217
GOODWILL	205,143	205,143
INTANGIBLE ASSETS, NET	96,469	123,115
OTHER ASSETS	147,725	147,685
TOTAL ASSETS	4,827,750	5,045,617
CURRENT LIABILITIES:
Current maturities of long-term debt, net of unamortized discount and debt issuance costs totaling $0 and $2,040	28,029	100,188
Accounts payable ($75,333 and $116,461 related to VIEs)	656,135	794,611
Retainage payable ($34,620 and $26,439 related to VIEs)	286,036	315,135
Billings in excess of costs and estimated earnings ($340,943 and $362,427 related to VIEs)	754,939	839,222
Accrued expenses and other current liabilities ($9,892 and $9,595 related to VIEs)	207,850	215,207
Total current liabilities	1,932,989	2,264,363
LONG-TERM DEBT, less current maturities, net of unamortized discount and debt issuance costs totaling $17,921 and $20,209	939,955	925,277
DEFERRED INCOME TAXES	83,065	82,966
OTHER LONG-TERM LIABILITIES	241,123	230,066
TOTAL LIABILITIES	3,197,132	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 51,072,432 and 50,827,205 shares	51,072	50,827
Additional paid-in capital	1,132,396	1,127,385
Retained earnings	484,978	422,385
Accumulated other comprehensive loss	(47,160)	(46,741)
Total stockholders' equity	1,621,286	1,553,856
Noncontrolling interests	9,332	(10,911)
TOTAL EQUITY	1,630,618	1,542,945
TOTAL LIABILITIES AND EQUITY	$ 4,827,750	$ 5,045,617