Investments - Additional Information (Details) $ in Thousands, equipment in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) aircraft engine equipment	Jun. 30, 2022 USD ($) equipment	Dec. 31, 2022 USD ($)
Related Party
Schedule of Equity Method Investments [Line Items]
Purchases from related party			$ 22,300
Other revenue
Schedule of Equity Method Investments [Line Items]
Other sales and revenue	$ 7,896	$ 4,855	13,748	$ 9,672
Equipment held for operating lease
Schedule of Equity Method Investments [Line Items]
Net book value	$ 2,161,650		$ 2,161,650		$ 2,111,935
WMES and CASC Willis
Schedule of Equity Method Investments [Line Items]
Number of assets sold | equipment			0.0	0.0
CASC Willis
Schedule of Equity Method Investments [Line Items]
Ownership interest	50.00%		50.00%
Number of engines in lease portfolio | engine			4
CASC Willis | Equipment held for operating lease
Schedule of Equity Method Investments [Line Items]
Net book value	$ 40,200		$ 40,200
WMES
Schedule of Equity Method Investments [Line Items]
Ownership interest	50.00%		50.00%
Number of engines in lease portfolio | engine			35
Number of aircraft in lease portfolio | aircraft			5
Proceeds from sale of assets			$ 22,300
Purchases from related party			15,500
WMES | Other revenue | Servicing of Engines | Related Party
Schedule of Equity Method Investments [Line Items]
Other sales and revenue	$ 600	$ 500	1,100	$ 1,000
WMES | Aircraft
Schedule of Equity Method Investments [Line Items]
Net book value	$ 231,700		$ 231,700