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ACCOUNTS PAYABLE, ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Accounts payable and accrued expenses    
Accounts payable $ 8,535 $ 28,280
Income taxes payable 8,413 7,643
Accrued expenses 26,600 31,693
Accrued salaries and benefits 42,891 44,150
Total $ 86,439 $ 111,766