Flight equipment subject to operating lease - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) aircraft	May 05, 2022 aircraft
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items]
Number of aircraft under operating lease terminated	24
Subsequent Event
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items]
Number of aircraft under operating lease terminated remaining in Russia		21
Flight Equipment
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items]
Write-off of Russian fleet | $	$ 791,017