CONSOLIDATED BALANCE SHEETS Consolidated Balance Sheets Parenthetical (Assets and Liabilities) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011		Sep. 30, 2011
Cash and cash equivalents	$ 287,322		$ 256,990		$ 193,099
Other noncurrent assets	78,375		80,616		80,709
Accounts payable	209,683		158,660		216,600
Billings in excess of costs and estimated earnings	91,348		90,845		89,505
Accrued expenses and other current liabilities	167,166		166,790		185,624
Consolidated Construction Joint Venture [Member] | Joint Venture Consolidated [Member]
Cash and cash equivalents	74,020	[1]	75,122	[1]	65,350	[1]
Receivables, Net, Current	31,028		30,332		28,493
Other noncurrent assets	6,661		8,671		9,821
Accounts payable	30,975		38,193		36,660
Billings in excess of costs and estimated earnings	13,955	[1]	22,251	[1]	17,116	[1]
Accrued expenses and other current liabilities	$ 3,495		$ 5,129		$ 5,997

[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.