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Accrued maintenance liability (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accrued Maintenance Liability [Line Items]      
Accrued maintenance liability at beginning of period $ 1,750,395 $ 2,190,159  
Maintenance payments received 448,516 345,699  
Maintenance payments returned (209,087) (412,492)  
Release to income other than upon sale (273,146) (344,210)  
Lessor contribution, top ups and other (30,456) 66,281  
Accrued maintenance liability at end of period 2,900,651 1,750,395 $ 2,190,159
Non-cash investing and financing activities      
Accrued Maintenance Liability [Line Items]      
Release to income upon sale (20,428) (95,042) $ (249,200)
GE Capital Aviation Services      
Accrued Maintenance Liability [Line Items]      
GECAS Transaction $ 1,234,857 $ 0