Loss (Gain) on Disposal (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2024 USD ($) aircraft aircraftEngine	Mar. 31, 2024 USD ($) aircraftLeasebackTransaction	Sep. 30, 2023 USD ($) aircraft aircraftLeasebackTransaction aircraftEngine	Sep. 30, 2024 USD ($) aircraft aircraftLeasebackTransaction aircraftEngine	Sep. 30, 2023 USD ($) aircraft aircraftEngine aircraftLeasebackTransaction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) gain on disposal of assets	$ (3,191)		$ 2,250	$ 13,885	$ (5,652)
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			$ 2,200	$ 22,000	$ (4,500)
Number of aircraft related to loss | aircraftLeasebackTransaction			3	7	8
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)
Number of sale-leaseback transactions | aircraftLeasebackTransaction		5
Number of aircraft on leases | aircraftLeasebackTransaction		2
Failed aircraft sale leaseback | aircraftLeasebackTransaction		3
Obsolete Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale of obsolete assets	400		$ 200		$ 3,100
Airbus A319
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) gain on disposal of assets	$ (2,800)		$ 300	$ (6,100)	$ 1,900
Number of aircraft sold | aircraft	2		4	12	11
Number of engines sold | aircraftEngine	2		5	26	16