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DETAIL OF SELECTED BALANCE SHEET ACCOUNTS - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Accrued payroll liabilities $ 6,945 $ 7,432
Other accrued liabilities 5,696 5,318
Total accrued liabilities $ 12,641 $ 12,750