Loss (Gain) on Disposal (Details) $ in Thousands	3 Months Ended					6 Months Ended
	Jun. 30, 2024 USD ($) aircraftEngine aircraft aircraftLeasebackTransaction	Mar. 31, 2024 USD ($) aircraftLeasebackTransaction	Mar. 31, 2024 aircraftLeasebackTransaction	Mar. 31, 2024 aircraft aircraftLeasebackTransaction	Jun. 30, 2023 USD ($) aircraft aircraftLeasebackTransaction aircraftEngine	Jun. 30, 2024 USD ($) aircraftLeasebackTransaction aircraft aircraftEngine	Jun. 30, 2023 USD ($) aircraft aircraftLeasebackTransaction aircraftEngine	Mar. 31, 2024 aircraft
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal of assets	$ 14,047				$ (802)	$ 17,076	$ (7,902)
Number of aircraft sold | aircraft						10
Number of engines sold | aircraftEngine						24
Aircraft Leaseback Transaction, New Aircraft Deliveries
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale-leaseback transaction	$ 13,300				$ 1,200	$ 22,000	$ 6,600
Number of aircraft related to loss | aircraftLeasebackTransaction	4				3	7	5
Aircraft Leaseback Transaction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale-leaseback transaction		$ (1,700)
Additional sale-leaseback transaction			5	5
Number of aircraft on leases			2	2
Failed aircraft sale leaseback		3	3	3				3
Obsolete Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale of obsolete assets					$ 2,300		$ 2,800
Airbus A319
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal of assets	$ 600				$ 300	$ (3,300)	$ 1,500
Number of aircraft sold | aircraft	5				3		7
Number of engines sold | aircraftEngine	9				4		11