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Inventories - Schedule of Inventory, Current (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Finished goods $ 178,413 $ 149,298
Work in process 17,675 12,732
Raw materials 15,267 14,600
Inventories, net $ 211,355 $ 176,630