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Inventories (Schedule Of Components Of Inventories) (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Inventory, Net [Abstract]    
Finished goods $ 26,796 $ 25,199
Work-in-process 18,122 11,955
Raw materials 39,481 32,958
Stores, supplies and other 20,161 18,457
Inventories $ 104,560 $ 88,569