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Inventories and Deferred Preservation Costs (Narrative) (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Inventory [Line Items]    
Consignment inventory $ 12,600 $ 12,200
Deferred preservation costs $ 52,817 $ 51,701
Domestic    
Inventory [Line Items]    
Consignment inventory percentage 35.00% 39.00%
International    
Inventory [Line Items]    
Consignment inventory percentage 65.00% 61.00%