Leases, Commitments, Guarantees and Contingencies (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) aircraft	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 207,845		$ 207,845		$ 238,516
Current maturities of lease liabilities	75,609		75,609		78,886
Noncurrent operating leases	$ 134,597		134,597		$ 158,274
Operating leases			$ 35,000
Weighted-average remaining lease term for operating leases	6 years 3 months 18 days		6 years 3 months 18 days
Weighted-average discount rate for operating leases	6.00%		6.00%
Lease costs
Operating lease cost	$ 21,822	$ 22,085	$ 43,663	$ 44,211
Variable and short-term lease cost	805	1,056	1,822	2,280
Sublease income	(1,845)	(1,493)	(3,648)	(2,829)
Total lease cost	$ 20,782	$ 21,648	$ 41,837	$ 43,662
Aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft acquired | aircraft			43
Aircraft | Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	2 years		2 years
Aircraft | Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	8 years		8 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	34 years		34 years