Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accrued Liabilities, Current [Abstract]
Accrued salaries, wages and benefits	$ 7,639	$ 10,818
Accrual for insurance liabilities	5,694	5,223
Property taxes	499	1,615
Sales taxes	1,298	1,722
Interest	0	19
Other accrued expenses	485	549
Total accrued liabilities	$ 15,615	$ 19,946