Inventories, Net and Significant Supplier - Inventories, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 40,496	$ 33,059
Components	19,690	15,046
Work in process	5,892	5,860
Finished goods	69,666	80,119
Reserve for excess and obsolete inventory	(4,209)	(4,205)	$ (3,292)	$ (3,045)
Inventories, net	$ 131,535	$ 129,879