Lease Accounting (Lease Term and Discount Rate) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Weighted-average remaining lease term	13 years 1 month 2 days	13 years 2 months 4 days
Weighted-average discount rate	8.42%	8.35%
Lessor, Lease, Description [Line Items]
Operating lease costs	$ 32,900,000	$ 41,400,000	$ 13,600,000
Mileage credits	25,100,000	$ 22,500,000	$ 22,400,000
Marine transportation
Lessor, Lease, Description [Line Items]
Expected undiscounted cash flows, year one	$ 29,600,000