CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents ($79,111 and $0 related to variable interest entities ("VIEs"))	$ 221,878	$ 146,103
Restricted cash	17,424	50,504
Restricted investments	48,775
Accounts receivable ("AR") including retainage of $574,710 and $569,391 (AR of $36,317 and $0 related to VIEs)	1,857,870	1,743,300
Costs and estimated earnings in excess of billings	902,312	831,826
Other current assets	70,781	66,023
Total current assets	3,119,040	2,837,756
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $345,546 and $313,783	447,588	477,626
GOODWILL	585,006	585,006
INTANGIBLE ASSETS, NET	90,340	92,997
OTHER ASSETS	40,811	45,235
TOTAL ASSETS	4,282,785	4,038,620
CURRENT LIABILITIES:
Current maturities of long-term debt	30,951	85,890
Accounts payable ("AP") including retainage of $267,110 and $258,294 (AP of $4,826 and $0 related to VIEs)	949,675	994,016
Billings in excess of costs and estimated earnings ($91,750 and $0 related to VIEs)	403,635	331,112
Accrued expenses and other current liabilities	124,385	107,925
Total current liabilities	1,508,646	1,518,943
LONG-TERM DEBT, less current maturities, net of unamortized discounts and debt issuance costs totaling $54,699 and $56,072	855,325	673,629
DEFERRED INCOME TAXES	132,335	131,007
OTHER LONG-TERM LIABILITIES	155,553	162,018
TOTAL LIABILITIES	2,651,859	2,485,597
CONTINGENCIES AND COMMITMENTS (NOTE 7)
Stockholders' Equity:
Preferred stock - authorized 1,000,000 shares ($1 par value), none issued
Common stock - authorized 75,000,000 shares ($1 par value), issued and outstanding 49,781,010 and 49,211,353 shares	49,781	49,211
Additional paid-in capital	1,080,371	1,075,600
Retained earnings	541,069	473,625
Accumulated other comprehensive loss	(43,298)	(45,413)
Total Stockholders' Equity	1,627,923	1,553,023
Noncontrolling interests	3,003
TOTAL EQUITY	1,630,926	1,553,023
TOTAL LIABILITIES AND EQUITY	$ 4,282,785	$ 4,038,620