CONSOLIDATED BALANCE SHEETS Consolidated Balance Sheets Parenthetical (Assets and Liabilities) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011
Cash and cash equivalents	$ 237,951		$ 256,990		$ 190,069
Other noncurrent assets	78,503		80,616		82,214
Accounts payable	186,290		158,660		179,664
Billings in excess of costs and estimated earnings	75,629		90,845		122,014
Accrued expenses and other current liabilities	155,322		166,790		156,727
Consolidated Construction Joint Venture [Member] | Joint Venture Consolidated [Member]
Cash and cash equivalents	67,685	[1]	75,122	[1]	89,666	[1]
Receivables, Net, Current	26,903		30,332		31,958
Other noncurrent assets	6,919		8,671		11,012
Accounts payable	31,135		38,193		37,229
Billings in excess of costs and estimated earnings	17,979	[1]	22,251	[1]	41,386	[1]
Accrued expenses and other current liabilities	$ 3,027		$ 5,129		$ 9,147

[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.