Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Asset impairment (Details)

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Asset impairment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Asset Impairment Charges [Abstract]      
Flight equipment held for operating leases (Note 5) $ 69,383 $ 39,318 $ 54,331
Flight equipment held for sale 766 4,868 6,955
Asset impairment $ 70,149 $ 44,186 $ 61,286