Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accrued Liabilities, Current [Abstract]
Accrued salaries, wages and benefits	$ 8,115	$ 4,925
Accrual for self-insurance liabilities	7,998	7,490
Property taxes	2,020	2,146
Sales tax	1,991	676
Interest	112	19
Payable to TAS Seller	728	0
Other accrued expenses	1,185	547
Total accrued liabilities	$ 22,149	$ 15,803