Leases - Narrative (Details)	6 Months Ended
	Jun. 30, 2024 USD ($) aircraft_engine aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft under direct operating leases | aircraft	8
Number of spare engines owned | aircraft_engine	31
Number of spare engines unencumbered | aircraft_engine	10
Number of spare engines pledged as collateral | aircraft_engine	21
Noncancellable short-term operating lease, payments, remainder of year | $	$ 3,800,000
Noncancellable short-term operating lease, payments, year one and beyond | $	$ 0
Aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft owned | aircraft	58
Number of aircraft unencumbered | aircraft_engine	7
Failed aircraft sale leaseback | aircraft	18
A320 Family | Aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft owned | aircraft	210
Aircraft
Lessee, Lease, Description [Line Items]
Number of aircraft under sale-leaseback transactions | aircraft	7
Aircraft | A320 Family
Lessee, Lease, Description [Line Items]
Operating leases of lessee, number of leased assets | aircraft	134
Aircraft | Minimum
Lessee, Lease, Description [Line Items]
Operating leases, term	4 years
Aircraft | Maximum
Lessee, Lease, Description [Line Items]
Operating leases, term	18 years
Other | Maximum
Lessee, Lease, Description [Line Items]
Operating leases, term	99 years
Spare Engines
Lessee, Lease, Description [Line Items]
Number of engines purchased with cash | aircraft_engine	3
Operating leases of lessee, number of leased assets | aircraft_engine	6
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