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Inventories - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials, consumables and supplies, net $ 69,168 $ 73,460
Work in process 148 1,246
Finished goods, net 95,483 108,923
Total $ 164,799 $ 183,629