Leases, Commitments, Guarantees and Contingencies (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) aircraft	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 85,303		$ 85,303		$ 86,727
Current maturities of lease liabilities	18,496		18,496		19,335
Noncurrent operating leases	$ 66,807		66,807		$ 67,392
Operating leases			$ 16,700
Weighted-average remaining lease term for operating leases	11 years 4 months 24 days		11 years 4 months 24 days
Weighted-average discount rate for operating leases	6.30%		6.30%
Lease costs
Operating lease cost	$ 6,583	$ 7,959	$ 20,500	$ 40,764
Variable and short-term lease cost	453	868	2,029	2,205
Sublease income	(1,268)	(1,350)	(3,782)	(4,051)
Total lease cost	$ 5,768	$ 7,477	$ 18,747	$ 38,918
Aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft acquired | aircraft			8
Aircraft | Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	5 years		5 years
Aircraft | Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	6 years		6 years
Airport Facilities | Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 month		1 month
Airport Facilities | Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	32 years		32 years