Accrued Liabilities - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued compensation and benefits	$ 11,774	$ 13,649
Accrued warranties	2,354	2,594	$ 2,291	$ 2,309
Professional and legal fees	1,455	1,775
Taxes other than income	3,023	4,026
Other accrued liabilities	3,314	2,528
Accrued liabilities	$ 21,920	$ 24,572