Leases, Commitments, Guarantees and Contingencies (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) aircraft	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 96,374		$ 151,928
Current maturities of lease liabilities	18,741		71,726
Noncurrent operating leases	76,418		$ 88,622
Operating leases	$ 13,600
Weighted-average remaining lease term for operating leases	9 years 9 months 18 days
Weighted-average discount rate for operating leases	6.00%
Lease costs
Operating lease cost	$ 24,948	$ 21,841
Variable and short-term lease cost	803	1,018
Sublease income	(1,350)	(1,803)
Total lease cost	$ 24,401	$ 21,056
CRJ Aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft acquired | aircraft	32
Lease liability payable due	$ 125,500
Aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft acquired | aircraft	11
Aircraft | Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Aircraft | Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	8 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	33 years