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Inventories, net and Deferred Preservation Costs (Schedule Of Inventories) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 36,322 $ 36,715
Work-in-process 11,319 10,476
Finished goods 28,632 27,287
Total inventories, net $ 76,273 $ 74,478