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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Finished goods $ 114,710 $ 134,467
Work-in-process 23,765 17,602
Raw materials 70,634 73,629
Total Inventories $ 209,109 $ 225,698