Accrued Liabilities - Accrued Liabilities Schedule (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Accrued compensation and benefits	$ 13,649	$ 12,798
Accrued warranties	2,594	2,309	$ 2,719	$ 2,364
Professional and legal fees	1,775	2,014
Taxes other than income	4,026	2,605
Other accrued liabilities	2,528	2,848
Total accrued liabilities	$ 24,572	$ 22,574