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ACCOUNTS PAYABLE, ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Accounts payable $ 20,908 $ 27,853
Accrued expenses - general 24,442 27,866
Accrued salaries and benefits 19,156 31,356
Income taxes payable 32 165
Total $ 64,538 $ 87,240