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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Accrued Liabilities, Current [Abstract]    
Accrued salaries, wages and benefits $ 7,952 $ 8,115
Accrual for insurance liabilities 4,718 7,998
Property taxes 1,296 2,020
Sales taxes 1,429 1,991
Interest 0 112
Payable to TAS Seller 0 728
Other accrued expenses 603 1,185
Total accrued liabilities $ 15,998 $ 22,149