CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents ($105,735 and $103,850 related to VIEs)	$ 374,289	$ 193,685
Restricted cash	77,563	8,416
Restricted investments	78,912	70,974
Accounts receivable ($86,012 and $91,090 related to VIEs)	1,415,063	1,354,519
Retainage receivable ($122,335 and $89,132 related to VIEs)	648,441	562,375
Costs and estimated earnings in excess of billings ($39,846 and $22,764 related to VIEs)	1,236,734	1,123,544
Other current assets ($51,746 and $58,128 related to VIEs)	249,455	197,473
Total current assets	4,080,457	3,510,986
PROPERTY AND EQUIPMENT:
Land	44,167	39,047
Building and improvements	116,422	115,041
Construction equipment	570,675	560,547
Other equipment	192,247	183,197
Total property and equipment, gross	923,511	897,832
Less accumulated depreciation	(434,294)	(388,147)
Total property and equipment, net ($12,840 and $49,919 related to VIEs)	489,217	509,685
GOODWILL	205,143	205,143
INTANGIBLE ASSETS, NET	123,115	155,270
OTHER ASSETS	147,685	104,693
TOTAL ASSETS	5,045,617	4,485,777
CURRENT LIABILITIES:
Current maturities of long-term debt, net of unamortized discount and debt issuance costs totaling $2,040 and $0	100,188	124,054
Accounts payable ($116,461 and $93,848 related to VIEs)	794,611	682,699
Retainage payable ($26,439 and $13,967 related to VIEs)	315,135	252,181
Billings in excess of costs and estimated earnings ($362,427 and $422,847 related to VIEs)	839,222	844,389
Accrued expenses and other current liabilities ($9,595 and $25,402 related to VIEs)	215,207	206,533
Total current liabilities	2,264,363	2,109,856
LONG-TERM DEBT, less current maturities, net of unamortized discount and debt issuance costs totaling $20,209 and $23,343	925,277	710,422
DEFERRED INCOME TAXES	82,966	35,686
OTHER LONG-TERM LIABILITIES	230,066	199,288
TOTAL LIABILITIES	3,502,672	3,055,252
COMMITMENTS AND CONTINGENCIES (Note 8)
Stockholders' equity:
Preferred stock – authorized 1,000,000 shares ($1 par value), none issued	0	0
Common stock – authorized 112,500,000 and 75,000,000 shares ($1 par value), issued and outstanding 50,827,205 and 50,278,816 shares	50,827	50,279
Additional paid-in capital	1,127,385	1,117,972
Retained earnings	422,385	313,991
Accumulated other comprehensive loss	(46,741)	(42,100)
Total stockholders' equity	1,553,856	1,440,142
Noncontrolling interests	(10,911)	(9,617)
TOTAL EQUITY	1,542,945	1,430,525
TOTAL LIABILITIES AND EQUITY	$ 5,045,617	$ 4,485,777