CONSOLIDATED BALANCE SHEETS Consolidated Balance Sheets Parenthetical (Assets and Liabilities) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013
Cash and cash equivalents	$ 205,780		$ 229,121		$ 260,773
Property and equipment, net	432,398		436,859		477,666
Accounts payable	141,241		160,706		169,940
Billings in excess of costs and estimated earnings	125,618		138,375		124,609
Accrued expenses and other current liabilities	193,307		197,242		188,685
Consolidated Construction Joint Venture [Member] | Joint Venture Consolidated [Member]
Cash and cash equivalents	27,612	[1]	38,800	[1]	98,738	[1]
Receivables, Net, Current	39,014		38,372		47,040
Property and equipment, net	19,801		22,216		39,486
Accounts payable	22,136		16,937		26,354
Billings in excess of costs and estimated earnings	43,087	[1]	60,185	[1]	71,821	[1]
Accrued expenses and other current liabilities	$ 7,074		$ 11,299		$ 8,983

[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.