Quarterly report pursuant to Section 13 or 15(d)

Inventories - Summary of Inventories (Details)

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Inventories - Summary of Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Finished Goods $ 36,850 $ 28,792
Work in Progress 32,997 20,790
Raw Material 69,418 67,015
Inventory, net $ 139,265 $ 116,597