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Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Inventory, Finished Goods, Gross $ 64,484 $ 68,121
Inventory, Raw Materials, Gross 3,288 2,910
Other Inventory, Supplies, Gross 5,018 4,001
Inventory, Work in Process, Gross 1,670 1,626
Inventories $ 74,460 $ 76,658