Leases - Narrative (Details)	6 Months Ended
	Jun. 30, 2022 USD ($) aircraft aircraft_engine agreement	Dec. 31, 2019 USD ($) a residential_building_unit
Lessee, Lease, Description [Line Items]
Number of spare engines owned | aircraft_engine	22
Number of spare engines unencumbered | aircraft_engine	1
Number of spare engines pledged as collateral | aircraft_engine	21
Number of aircraft and engine master lease agreements with maintenance reserves as collateral | agreement	1
Area of land | a		8.5
Land | $		$ 41,000,000
Noncancellable short-term operating lease, payments, remainder of year | $	$ 3,200,000
Noncancellable short-term operating lease, payments, year one and beyond | $	$ 0
Aircraft
Lessee, Lease, Description [Line Items]
Failed aircraft sale leaseback	1
A320 Family | Aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft held	180
Number of aircraft owned	105
Number of capitalized aircraft or engine purchased off lease	33
Aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft under sale-leaseback transactions	7
Aircraft | A320 Family
Lessee, Lease, Description [Line Items]
Number of leased assets financed under operating leases	74
Aircraft | Minimum
Lessee, Lease, Description [Line Items]
Operating leases, term	8 years
Aircraft | Maximum
Lessee, Lease, Description [Line Items]
Operating leases, term	18 years
Other Leased Equipment and Property
Lessee, Lease, Description [Line Items]
Area of land | a		2.6
Number of units in residential building expected to be built | residential_building_unit		200
Other Leased Equipment and Property | Maximum
Lessee, Lease, Description [Line Items]
Operating leases, term	99 years	99 years
Spare Engines
Lessee, Lease, Description [Line Items]
Number of engines purchased with cash | aircraft_engine	2
Number of leased assets financed under operating leases | aircraft_engine	12
Leased Computer And Office Equipment | Minimum
Lessee, Lease, Description [Line Items]
Finance leases, term	4 years
Leased Computer And Office Equipment | Maximum
Lessee, Lease, Description [Line Items]
Finance leases, term	5 years