Fair Value Measurements - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) equipment	Dec. 31, 2021 USD ($) engine equipment	Dec. 31, 2021 USD ($) equipment airframe	Dec. 31, 2020 USD ($)	Dec. 31, 2020 USD ($) engine	Dec. 31, 2020 USD ($) airframe
Derivative instruments
Fair value of notes receivable	$ 117,700	$ 117,700	$ 117,700	$ 159,200	$ 159,200	$ 159,200
Fair value of notes payable	1,827,400	1,827,400	1,827,400	1,691,000	1,691,000	1,691,000
Interest expense	67,985			63,024
Write-down of equipment	7,715			20,540
Equipment held for lease
Derivative instruments
Write-down of equipment	3,500			4,900
Net book value of equipment held for operating lease	1,991,368	$ 1,991,368	$ 1,991,368	1,886,613	$ 1,886,613	$ 1,886,613
Assets To Be Sold Or Parted Out
Derivative instruments
Write-down of equipment	3,900
Number of assets impaired		3	1		10	2
Assets To Be Sold Or Parted Out | Equipment held for lease
Derivative instruments
Net book value of equipment held for operating lease	$ 36,000	$ 36,000	$ 36,000
Number of assets previously impaired | equipment	22	22	22
Impaired Assets
Derivative instruments
Write-down of equipment	$ 3,800
Number of assets impaired | engine		7			7
Nonrecurring
Derivative instruments
Write-down of equipment	7,700			20,500
Nonrecurring | Assets To Be Sold Or Parted Out
Derivative instruments
Write-down of equipment				15,200
Nonrecurring | Impaired Assets
Derivative instruments
Write-down of equipment				5,300
Interest rate contracts
Derivative instruments
Net fair value of swap asset (liability)	7,300	$ 7,300	$ 7,300	(4,000)	$ (4,000)	$ (4,000)
Fair value of interest rate swap, asset	8,000	8,000	8,000
Fair value of interest rate swap, liability	700	$ 700	$ 700
Interest expense	$ 2,400			$ 2,000