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ACCOUNTS PAYABLE, ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Accounts payable $ 18,209 $ 27,853
Accrued expenses - general 26,114 27,866
Accrued salaries and benefits 21,303 31,356
Income taxes payable 1,373 165
Total $ 66,999 $ 87,240