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Inventories, Net and Significant Supplier - Inventories, Net (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]        
Raw materials $ 36,289 $ 29,290    
Components 18,362 12,228    
Work in process 5,144 5,671    
Finished goods 67,954 78,222    
Reserve for excess and obsolete inventory (3,658) (3,045) $ (2,576) $ (2,539)
Inventories, net $ 124,091 $ 122,366