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Detail of Certain Balance Sheet Accounts - Accounts Payable and Accrued Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Balance Sheet Related Disclosures [Abstract]    
Accounts payable, trade $ 412,601 $ 373,947
Accrued compensation and related expenses 163,000 111,688
Accrued insurance, current portion 44,608 44,503
Accrued loss on contracts 2,806 4,770
Deferred revenues, current portion 22,764 22,499
Income and franchise taxes payable 74,499 85,663
Other accrued expenses 81,902 64,215
Accounts payable and accrued expenses, Total $ 802,180 $ 707,285