Flight equipment subject to operating lease - Schedule of Flight Equipment Subject to Operating Lease (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Movement in Property, Plant and Equipment [Roll Forward]
Depreciation of flight equipment	$ (309,783)	$ (299,019)
Flight equipment subject to operating leases reclassified to flight equipment held for sale	(628,925)	(60,572)
Transfer of flight equipment to investment in sales-type lease	(21,674)	$ (33,778)
Flight Equipment
Movement in Property, Plant and Equipment [Roll Forward]
Net book value, beginning balance	29,053,630
Purchase of flight equipment	781,595
Depreciation of flight equipment	(309,783)
Flight equipment subject to operating leases reclassified to flight equipment held for sale	(628,925)
Transfer of flight equipment to investment in sales-type lease	(21,674)
Net book value, ending balance	28,874,843
Accumulated depreciation	$ (6,857,633)