CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents ($43,131 and $53,067 related to VIEs)	$ 116,075	$ 192,868
Restricted cash	3,788	4,780
Restricted investments	58,142	53,014
Accounts receivable ($62,482 and $30,003 related to VIEs)	1,261,072	1,265,717
Retainage receivable ($36,724 and $12,410 related to VIEs)	478,744	535,939
Costs and estimated earnings in excess of billings	1,142,295	932,758
Other current assets ($30,185 and $0 related to VIEs)	115,527	89,316
Total current assets	3,175,643	3,074,392
PROPERTY AND EQUIPMENT:
Land	41,599	41,382
Building and improvements	125,193	125,029
Construction equipment	486,034	477,988
Other equipment	181,578	182,288
Total property and equipment, gross	834,404	826,687
Less accumulated depreciation	(343,735)	(359,188)
Total property and equipment, net ($51,508 and $11,641 related to VIEs)	490,669	467,499
GOODWILL	585,006	585,006
INTANGIBLE ASSETS, NET	85,911	89,454
OTHER ASSETS	50,523	47,772
TOTAL ASSETS	4,387,752	4,264,123
CURRENT LIABILITIES:
Current maturities of long-term debt	16,767	30,748
Accounts payable ($18,070 and $19,243 related to VIEs)	621,728	699,971
Retainage payable	211,956	261,820
Billings in excess of cost and estimated earnings ($263,764 and $120,952 related to VIEs)	573,190	456,869
Accrued expenses and other current liabilities ($34,828 and $0 related to VIEs)	174,325	132,438
Total current liabilities	1,597,966	1,581,846
LONG-TERM DEBT, less current maturities, net of unamortized discounts and debt issuance costs totaling $34,998 and $45,631	744,737	705,528
DEFERRED TAX LIABILITIES	105,521	108,504
OTHER LONG-TERM LIABILITIES	151,639	163,465
TOTAL LIABILITIES	2,599,863	2,559,343
COMMITMENTS AND CONTINGENCIES (Note 8)
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 50,025,996 and 49,781,010 shares	50,026	49,781
Additional paid-in capital	1,102,919	1,084,205
Retained earnings	701,681	622,007
Accumulated other comprehensive loss	(45,449)	(42,718)
Total stockholders' equity	1,809,177	1,713,275
Noncontrolling interests	(21,288)	(8,495)
TOTAL EQUITY	1,787,889	1,704,780
TOTAL LIABILITIES AND EQUITY	$ 4,387,752	$ 4,264,123