CONSOLIDATED BALANCE SHEETS Consolidated Balance Sheets Parenthetical (Assets and Liabilities) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013
Cash and cash equivalents	$ 167,174		$ 229,121		$ 212,463
Property and equipment, net	424,272		436,859		458,024
Accounts payable	205,493		160,706		198,282
Billings in excess of costs and estimated earnings	115,809		138,375		146,343
Accrued expenses and other current liabilities	221,618		197,242		219,169
Consolidated Construction Joint Venture [Member] | Joint Venture Consolidated [Member]
Cash and cash equivalents	29,518	[1]	38,800	[1]	57,133	[1]
Receivables, Net	45,483		38,372		47,696
Costs and estimated earnings in excess of billings	21,105	[1]	178	[1]	81	[1]
Property and equipment, net	16,172		22,216		28,194
Accounts payable	22,951		16,937		20,075
Billings in excess of costs and estimated earnings	23,138	[1]	60,185	[1]	70,518	[1]
Accrued expenses and other current liabilities	$ 3,110		$ 11,299		$ 12,816

[1] The volume and stage of completion of contracts from our consolidated construction joint ventures may cause fluctuations in cash and cash equivalents as well as billings in excess of costs and estimated earnings between periods.