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ACCRUED LIABILITIES Table (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Accrued Liabilities, Current [Abstract]    
Derivative liabilities $ 121 $ 4,623
Employee wages and benefit costs 31,143 32,349
Unearned income 14,290 10,884
Other 9,640 13,169
Accrued liabilities $ 55,194 $ 61,025