Related Party Transactions (Details) $ in Thousands	3 Months Ended
Related Party Transactions (Details) $ in Thousands	Mar. 31, 2026 USD ($) engine lease	Mar. 31, 2025 USD ($)	Mar. 31, 2025 engine	Mar. 31, 2025 airframe
Related Party Transaction [Line Items]
Technical expense	$ 9,688	$ 6,230
Payment for fleet management services	$ 700
Willis Mitsui And Company Engine Support Limited
Related Party Transaction [Line Items]
Number of assets sold			3	1
Proceeds from sale of assets		32,200
Gain on sale of asset		1,600
Number of assets purchased \| engine	0		0
Lessee, operating lease, number of engines subleased \| engine	2
Number of leases renewed \| lease	1
Technical expense	$ 700	$ 600
Contributions	$ 19,500
Willis Mitsui And Company Engine Support Limited \| Transaction One
Related Party Transaction [Line Items]
Number of assets sold \| engine	5
Proceeds from sale of assets	$ 55,300
Gain on sale of asset	$ 15,300
CASC Willis Engine Lease Company Limited
Related Party Transaction [Line Items]
Number of assets sold \| engine	0		0
Number of assets purchased \| engine	0		0
Willis Aviation Lending Warehouse I LLC
Related Party Transaction [Line Items]
Number of assets sold \| engine	11
Proceeds from sale of assets	$ 87,200
Gain on sale of asset	$ 400