Investments - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) engine aircraft	Dec. 31, 2022 USD ($) engine
Schedule of Equity Method Investments [Line Items]
ROU assets	$ 8,652	$ 11,382
Total lease liabilities	$ 7,941	$ 10,365
WMES
Schedule of Equity Method Investments [Line Items]
Number of assets sold | engine	2	2
Proceeds from sale of assets	$ 28,800	$ 12,600
ROU assets		4,900
Total lease liabilities		4,900
Equipment Held For Operating Lease
Schedule of Equity Method Investments [Line Items]
Net book value	$ 2,112,837	2,111,935
WMES
Schedule of Equity Method Investments [Line Items]
Ownership interest	50.00%
Number of engines in lease portfolio | engine	35
Number of aircraft in lease portfolio | aircraft	4
Proceeds from sale of assets	$ 22,300
WMES | Other Revenue | Asset Management
Schedule of Equity Method Investments [Line Items]
Management fees earned	2,400	$ 2,000
WMES | Equipment Held For Operating Lease
Schedule of Equity Method Investments [Line Items]
Net book value	$ 232,200
CASC Willis
Schedule of Equity Method Investments [Line Items]
Ownership interest	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	$ 39,800