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Detail of Certain Balance Sheet Accounts - Accounts Payable and Accrued Expenses (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]    
Accounts payable, trade $ 452,295 $ 477,370
Accrued compensation and related expenses 159,045 164,777
Accrued insurance, current portion 61,327 49,309
Deferred revenues, current portion 8,010 13,082
Income and franchise taxes payable 3,923 20,946
Other accrued expenses 97,534 99,747
Accounts payable and accrued expenses, Total $ 782,134 $ 825,231