v3.25.4
Income taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Deferred tax assets    
Flight equipment $ 7,895 $ 10,924
Other intangibles 66,707 72,702
Deferred losses on sale of assets 3,891 8,137
Operating loss and tax credit carryforwards 1,552,840 1,821,502
Other (9,723) (17,388)
Total deferred tax assets 1,641,056 1,930,653
Valuation allowance (47,508) (55,956)
Deferred tax assets, net of valuation allowance 1,593,548 1,874,697
Deferred tax liabilities    
Flight equipment (4,557,963) (4,350,398)
Other intangibles (14,724) (17,458)
Other (14,149) (13,711)
Total deferred tax liabilities (4,586,836) (4,381,567)
Total net deferred tax (liabilities) assets (2,993,288) (2,506,870)
Ireland    
Deferred tax assets    
Flight equipment 7,103 7,285
Other intangibles 0 0
Deferred losses on sale of assets 0 0
Operating loss and tax credit carryforwards 1,429,696 1,713,394
Other (619) (1,332)
Total deferred tax assets 1,437,418 1,722,011
Valuation allowance (24,030) (33,601)
Deferred tax assets, net of valuation allowance 1,413,388 1,688,410
Deferred tax liabilities    
Flight equipment (4,454,453) (4,264,191)
Other intangibles (14,724) (17,458)
Other (8,288) (6,421)
Total deferred tax liabilities (4,477,465) (4,288,070)
Total net deferred tax (liabilities) assets (3,064,077) (2,599,660)
Foreign jurisdictions:    
Deferred tax assets    
Flight equipment 792 3,639
Other intangibles 66,707 72,702
Deferred losses on sale of assets 3,891 8,137
Operating loss and tax credit carryforwards 123,144 108,108
Other (9,104) (16,056)
Total deferred tax assets 203,638 208,642
Valuation allowance (23,478) (22,355)
Deferred tax assets, net of valuation allowance 180,160 186,287
Deferred tax liabilities    
Flight equipment (103,510) (86,207)
Other intangibles 0 0
Other (5,861) (7,290)
Total deferred tax liabilities (109,371) (93,497)
Total net deferred tax (liabilities) assets $ 70,789 $ 92,790