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Inventories - Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Inventory Disclosure [Abstract]      
Finished goods $ 51,189   $ 40,412
Work in process 724   89
Materials and supplies 14,297   13,051
Inventories: $ 66,210 $ 53,552 $ 53,552