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Inventories and Deferred Preservation Costs (Schedule of Inventories) (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 36,246 $ 35,295
Work-in-process 17,821 13,926
Finished goods 32,656 30,545
Inventories $ 86,723 $ 79,766