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Note M - Leases - Lease Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating revenues $ 155,342 $ 182,592
Lease Revenue [Member]    
Operating revenues 2,808 2,119
Trucks under Operating Lease [Member] | Lease Revenue [Member]    
Operating revenues 2,605 1,991
Dock Space under Operating Lease [Member] | Lease Revenue [Member]    
Operating revenues $ 203 $ 128