Investments - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) airframe engine	Sep. 30, 2024 USD ($) engine	Sep. 30, 2025 USD ($) engine	Sep. 30, 2025 USD ($) engine	Sep. 30, 2025 USD ($) aircraft engine	Sep. 30, 2025 USD ($) engine	Sep. 30, 2025 USD ($) airframe engine	Sep. 30, 2024 USD ($) engine	Dec. 31, 2024 USD ($) engine
Schedule of Equity Method Investments [Line Items]
Gain on sale of business	$ 0	$ 0	$ 42,950					$ 0
Payment for fleet management services	500		500
Equipment Held For Operating Lease
Schedule of Equity Method Investments [Line Items]
Net book value	$ 2,700,373		$ 2,700,373	$ 2,700,373	$ 2,700,373	$ 2,700,373	$ 2,700,373		$ 2,635,910
WMES
Schedule of Equity Method Investments [Line Items]
Ownership interest	50.00%		50.00%	50.00%	50.00%	50.00%	50.00%
Number of engines in lease portfolio | engine				53
Number of aircrafts in lease portfolio | aircraft					1
Number of assets sold | engine		0						3
Proceeds from sale of assets								$ 44,700
Gain on sale of asset								12,000
Number of assets purchased | airframe	0
Purchases from related party			$ 7,200
Lessee, operating lease, number of engines subleased | engine	2		2	2	2	2	2		1
ROU assets	$ 800		$ 800	$ 800	$ 800	$ 800	$ 800		$ 1,600
Lease liability	$ 700		700	$ 700	700	700	$ 700		$ 1,600
WMES | Transaction One
Schedule of Equity Method Investments [Line Items]
Number of assets sold	0			3			1
Proceeds from sale of assets			32,200
Gain on sale of asset			1,600
WMES | Transaction Two
Schedule of Equity Method Investments [Line Items]
Number of assets sold | engine				1
Proceeds from sale of assets			21,100
Gain on sale of asset			1,400
WMES | Other Income | Asset Management
Schedule of Equity Method Investments [Line Items]
Other sales and revenue	$ 1,000	$ 1,200	4,000					$ 4,000
WMES | Equipment Held For Operating Lease
Schedule of Equity Method Investments [Line Items]
Net book value	$ 364,100		364,100	$ 364,100	364,100	364,100	$ 364,100
CASC Willis
Schedule of Equity Method Investments [Line Items]
Number of engines in lease portfolio | engine				6
Number of assets sold | engine	1	0		2				0
Proceeds from sale of assets	$ 7,500		13,600
Gain on sale of asset	1,500		1,500
CASC Willis | Equipment Held For Operating Lease
Schedule of Equity Method Investments [Line Items]
Net book value	$ 50,000		$ 50,000	$ 50,000	$ 50,000	$ 50,000	$ 50,000
WGET
Schedule of Equity Method Investments [Line Items]
Ownership interest	70.00%		70.00%	70.00%	70.00%	70.00%	70.00%
Contributions			$ 1,600
Percentage of cost of the land						70.00%
Committed amount			$ 27,200
WGET | Global Engine Maintenance
Schedule of Equity Method Investments [Line Items]
Ownership interest	30.00%		30.00%	30.00%	30.00%	30.00%	30.00%
WAML
Schedule of Equity Method Investments [Line Items]
Total purchase price			$ 45,000
Gain on sale of business			$ 43,000