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Inventories - Schedule of Inventory Current (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Finished goods $ 59,244 $ 81,194
Work-in-progress 59,166 52,578
Raw materials 97,025 82,734
Total $ 215,435 $ 216,506