Loss on Disposal of Assets (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) aircraft	Sep. 30, 2019 USD ($) aircraft	Sep. 30, 2020 USD ($) aircraft	Sep. 30, 2019 USD ($) aircraft
Discontinued Operations and Disposal Groups [Abstract]
Loss on disposal of assets	$ 0	$ 13,410,000	$ 0	$ 16,873,000
Loss on disposition of excess and obsolete inventory				11,600,000
Impairment of long-lived assets to be disposed of				3,100,000
Write-off of previously capitalized costs deemed unrecoverable				2,300,000
Sale and leaseback transaction gain				$ 100,000
Number of aircraft with secured sale-leaseback financing commitments | aircraft	1	1	1	1