Accrued and Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued and Other Liabilities
Accrued interest	$ 10,900	$ 12,253
Accrued compensation	6,865	5,476
Warranty reserve	4,033	3,333
Infrastructure obligations	5,979	5,799
Contingent consideration (earn-out)	2,400	7,083
Other	4,121	4,882
Total	$ 34,298	$ 38,826