Leases, Commitments, Guarantees and Contingencies (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) aircraft	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 82,359		$ 82,359		$ 86,727
Current maturities of lease liabilities	18,805		18,805		19,335
Noncurrent operating leases	$ 63,554		63,554		$ 67,392
Operating leases			$ 10,700
Weighted-average remaining lease term for operating leases	11 years 6 months		11 years 6 months
Weighted-average discount rate for operating leases	6.20%		6.20%
Lease costs
Operating lease cost	$ 6,658	$ 7,857	$ 13,917	$ 32,805
Variable and short-term lease cost	543	534	1,576	1,337
Sublease income	(1,268)	(1,351)	(2,514)	(2,701)
Total lease cost	$ 5,933	$ 7,040	$ 12,979	$ 31,441
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