CONSOLIDATED BALANCE SHEETS Consolidated Balance Sheets Parenthetical (Assets and Liabilities) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Cash and cash equivalents	$ 198,298	$ 252,836	$ 239,403	$ 255,961
Other Assets, Current	37,100	26,985	38,102
Property and equipment, net	398,750	385,129	399,910
Accounts payable	139,215	157,571	121,013
Billings in excess of costs and estimated earnings	89,188	92,515	95,328
Accrued expenses and other current liabilities	226,276	200,935	231,690
Consolidated Construction Joint Venture [Member] | Joint Venture Consolidated [Member]
Cash and cash equivalents	46,993	46,210	52,884
Receivables, Net	51,431	$ 45,734	39,711
Cost and estimated earnings in excess of billings	0		0
Other Assets, Current	5,185	$ 4,863	2,510
Property and equipment, net	12,925	5,378	9,729
Accounts payable	16,309	11,909	14,960
Billings in excess of costs and estimated earnings	23,538	15,768	29,963
Accrued expenses and other current liabilities	$ 1,442	$ 1,171	$ 1,530