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Inventories, Net and Significant Supplier - Inventories, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]        
Raw materials $ 29,203 $ 29,290    
Components 13,592 12,228    
Work in process 7,532 5,671    
Finished goods 72,363 78,222    
Reserve for excess and obsolete inventory (3,549) (3,045) $ (2,898) $ (2,539)
Inventories, net $ 119,141 $ 122,366