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OTHER CURRENT LIABILITIES (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Other Liabilities, Current [Abstract]    
Tax payables $ 12,096 $ 8,567
Interest payable 986 3,160
Others 4,035 4,159
Total other current liabilities $ 17,117 $ 15,886