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Inventories (Schedule Of Components Of Inventories) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Inventory, Net [Abstract]    
Finished goods $ 28,664 $ 34,686
Work-in-process 9,569 15,604
Raw materials 20,314 58,262
Stores, supplies and other 20,754 19,219
Inventories $ 79,301 $ 127,771