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ACCOUNTS PAYABLE, ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Accounts payable $ 24,819 $ 27,853
Accrued expenses - general 20,856 27,866
Accrued salaries and benefits 18,116 31,356
Income taxes payable 0 165
Total $ 63,791 $ 87,240