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Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Inventory Disclosure [Abstract]      
Raw materials and work in process $ 119,417 $ 110,010 $ 107,880
Finished goods 490,418 404,663 452,765
Inventories $ 609,835 $ 514,673 $ 560,645