Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accrued Liabilities, Current [Abstract]
Accrued salaries, wages and benefits	$ 10,262	$ 4,925
Accrual for self-insurance liabilities	7,663	7,490
Property taxes	1,942	2,146
Sales taxes	2,711	676
Interest	498	19
Accrued Payments to Acquire Businesses	2,361	0
Other accrued expenses	867	547
Total accrued liabilities	$ 26,304	$ 15,803