CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents ($91,700 and $105,735 related to variable interest entities (“VIEs”))	$ 231,129	$ 374,289
Restricted cash	2,884	77,563
Restricted investments	85,545	78,912
Accounts receivable ($85,873 and $86,012 related to VIEs)	1,372,054	1,415,063
Retainage receivable ($139,617 and $122,335 related to VIEs)	683,966	648,441
Costs and estimated earnings in excess of billings ($90,294 and $39,846 related to VIEs)	1,346,974	1,236,734
Other current assets ($49,867 and $51,746 related to VIEs)	252,735	249,455
Total current assets	3,975,287	4,080,457
PROPERTY AND EQUIPMENT (“P&E”), net of accumulated depreciation of $475,207 and $434,294 (net P&E of $4,550 and $12,840 related to VIEs)	456,693	489,217
GOODWILL	205,143	205,143
INTANGIBLE ASSETS, NET	105,801	123,115
OTHER ASSETS	149,176	147,685
TOTAL ASSETS	4,892,100	5,045,617
CURRENT LIABILITIES:
Current maturities of long-term debt, net of unamortized discount and debt issuance costs totaling $0 and $2,040	36,941	100,188
Accounts payable ($86,263 and $116,461 related to VIEs)	692,835	794,611
Retainage payable ($30,681 and $26,439 related to VIEs)	331,341	315,135
Billings in excess of costs and estimated earnings ($344,239 and $362,427 related to VIEs)	764,029	839,222
Accrued expenses and other current liabilities ($7,096 and $9,595 related to VIEs)	200,138	215,207
Total current liabilities	2,025,284	2,264,363
LONG-TERM DEBT, less current maturities, net of unamortized discount and debt issuance costs totaling $18,712 and $20,209	933,303	925,277
DEFERRED INCOME TAXES	85,386	82,966
OTHER LONG-TERM LIABILITIES	237,697	230,066
TOTAL LIABILITIES	3,281,670	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 51,072,182 and 50,827,205 shares	51,072	50,827
Additional paid-in capital	1,130,368	1,127,385
Retained earnings	469,584	422,385
Accumulated other comprehensive loss	(46,526)	(46,741)
Total stockholders' equity	1,604,498	1,553,856
Noncontrolling interests	5,932	(10,911)
TOTAL EQUITY	1,610,430	1,542,945
TOTAL LIABILITIES AND EQUITY	$ 4,892,100	$ 5,045,617