Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities, Current [Abstract]
Accrued salaries, wages and benefits	$ 10,818	$ 8,115
Accrual for self-insurance liabilities	5,223	7,998
Property taxes	1,615	2,020
Sales tax	1,722	1,991
Interest	19	112
Payable to TAS Seller	0	728
Other accrued expenses	549	1,185
Total accrued liabilities	$ 19,946	$ 22,149