Loss (Gain) on Disposal (Details) $ in Thousands	1 Months Ended	3 Months Ended			9 Months Ended
	Jan. 31, 2023	Sep. 30, 2023 USD ($) aircraft aircraftEngine aircraftLeasebackTransaction	Sep. 30, 2022 USD ($) aircraftLeasebackTransaction	Mar. 31, 2022 USD ($) aircraftEngine	Sep. 30, 2023 USD ($) aircraftEngine aircraft aircraftLeasebackTransaction	Sep. 30, 2022 USD ($) aircraftLeasebackTransaction	Dec. 31, 2022 aircraft
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) gain on disposal of assets		$ 2,250	$ (9,374)		$ (5,652)	$ (31,562)
Gain (loss) on sale-leaseback transaction		$ 2,200			$ (4,500)
Number of aircraft related to loss | aircraftLeasebackTransaction		3	4		8	11
Repurchase agreement for the sale of aircraft, term	2 years
Number of aircraft sold | aircraft		4			11
Number of engines sold | aircraftEngine		5			16
Write-off of certain unrecoverable costs capitalized		$ 200			$ 3,100
Fixed asset impairment charges				$ 6,600
Number of impaired spare engine related to loss on disposal | aircraftEngine				1
Aircraft
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) gain on disposal of assets						$ (23,800)
Airbus A319
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) gain on disposal of assets		$ 300			$ 1,900
Airbus A319 | Aircraft | Impairment Due To Planned Acceleration Of Plane Retirement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of aircraft, accelerated retirement | aircraft							29