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Inventories - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Finished goods $ 172,577 $ 149,298
Work in process 18,192 12,732
Raw materials 15,141 14,600
Inventories, net $ 205,910 $ 176,630