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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Inventories [Abstract]    
Finished goods $ 78,601 $ 50,132
Work-in-process 9,168 6,429
Raw materials and supplies 30,937 11,795
Inventories $ 118,706 $ 68,356