CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 104,817	$ 146,103
Restricted cash	60,158	50,504
Accounts receivable, including retainage of $594,926 and $569,391	1,749,602	1,743,300
Costs and estimated earnings in excess of billings	840,760	831,826
Other current assets	58,482	66,023
Total current assets	2,813,819	2,837,756
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $333,531 and $313,783	462,695	477,626
GOODWILL	585,006	585,006
INTANGIBLE ASSETS, NET	92,111	92,997
OTHER ASSETS	44,852	45,235
TOTAL ASSETS	3,998,483	4,038,620
CURRENT LIABILITIES:
Current maturities of long-term debt	27,598	85,890
Accounts payable, including retainage of $264,336 and $258,294	965,931	994,016
Billings in excess of costs and estimated earnings	288,795	331,112
Accrued expenses and other current liabilities	112,448	107,925
Total current liabilities	1,394,772	1,518,943
LONG-TERM DEBT, less current maturities, net of unamortized discounts and debt issuance costs totaling $52,293 and $56,072	753,191	673,629
DEFERRED INCOME TAXES	130,616	131,007
OTHER LONG-TERM LIABILITIES	159,777	162,018
TOTAL LIABILITIES	2,438,356	2,485,597
CONTINGENCIES AND COMMITMENTS (NOTE 6)
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 49,694,018 and 49,211,353 shares	49,694	49,211
Additional paid-in capital	1,068,264	1,075,600
Retained earnings	487,389	473,625
Accumulated other comprehensive loss	(45,220)	(45,413)
TOTAL STOCKHOLERS' EQUITY	1,560,127	1,553,023
TOTAL LIABILITIES AND STOCKHOLERS' EQUITY	$ 3,998,483	$ 4,038,620