Flight equipment subject to operating lease - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($) aircraft	Dec. 31, 2022 USD ($)	Feb. 13, 2025 aircraft
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items]
Write-off of Russian fleet, net of (recoveries) | $	$ 0	$ (67,022)	$ 771,476
Subsequent Event
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items]
Number of aircraft under operating lease terminated remaining in Russia | aircraft				16
Airbus A320-200
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items]
Number of aircrafts subject to insurance policies | aircraft		3
Airbus A321-200
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items]
Number of aircrafts subject to insurance policies | aircraft		1
Flight Equipment
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items]
Write-off of Russian fleet, net of (recoveries) | $			$ 771,500
Insurance settlement gain (loss) | $		$ 67,000