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Flight equipment held for operating leases, net (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Movement in Property Subject to or Available for Operating Lease [Roll Forward]      
Net book value at beginning of period $ 35,870,781 $ 35,052,335  
Additions 2,108,539 4,621,821  
Depreciation (1,620,185) (1,650,450)  
Disposals and transfers to held for sale (169,503) (1,940,133)  
Transfers to investment in finance and sales-type leases, net/other assets (46,623) (143,409)  
Impairment (Note 22) (986,559) (69,383) $ (39,318)
Net book value at end of period 35,156,450 35,870,781 $ 35,052,335
Accumulated depreciation and impairment as of December 31, 2020 and 2019, respectively $ (9,825,647) $ (7,526,636)