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Flight equipment held for operating leases, net (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Movement in Property Subject to or Available for Operating Lease [Roll Forward]      
Net book value at beginning of period $ 35,052,335    
Net book value at beginning of period 35,052,335 $ 32,396,827  
Additions 4,621,821 5,877,691  
Depreciation (1,650,450)    
Depreciation   (1,649,710)  
Disposals and transfers to held for sale (1,940,133) (1,417,825)  
Transfers to net investment in finance and sales-type leases/inventory (143,409) (115,330)  
Impairment (Note 23) (69,383) (39,318) $ (54,331)
Net book value at end of period 35,870,781 35,052,335  
Net book value at end of period 35,870,781 35,052,335 $ 32,396,827
Accumulated depreciation as of December 31, 2019 $ (7,526,636)    
Accumulated depreciation as of December 31, 2018   $ (6,850,869)