Lease Accounting (Operating Lease Income) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Lessor, Lease, Description [Line Items]
Mileage credits	$ 25,100,000	$ 22,500,000	$ 22,400,000
Marine transportation
Lessor, Lease, Description [Line Items]
Lease revenue	28,200,000	$ 23,600,000	$ 16,400,000
Expected undiscounted cash flows, year one	29,600,000
Expected undiscounted cash flows, year two	30,700,000
Expected undiscounted cash flows, year three	$ 15,200,000