Leases, Commitments, Guarantees and Contingencies (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) aircraft	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 85,905		$ 86,727
Current maturities of lease liabilities	19,668		19,335
Noncurrent operating leases	66,237		$ 67,392
Operating leases	$ 5,700
Weighted-average remaining lease term for operating leases	11 years 4 months 24 days
Weighted-average discount rate for operating leases	6.20%
Lease costs
Operating lease cost	$ 7,259	$ 24,948
Variable and short-term lease cost	1,033	803
Sublease income	(1,246)	(1,350)
Total lease cost	$ 7,046	$ 24,401
Aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft acquired | aircraft	8
Aircraft | Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	5 years
Aircraft | Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	6 years
Airport Facilities | Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 month
Airport Facilities | Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	32 years