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Subsequent Events - Additional Information (Detail) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 USD ($) shares Awards Aircraft
Boeing 737 MAX aircraft [member] |
Disclosure of non-adjusting events after reporting period [line items] |
No of aircrafts held for sale delivered | Aircraft | 6
Major ordinary share transactions [member] |
Disclosure of non-adjusting events after reporting period [line items] |
Non-vested stock, number of awards approved | Awards | 2
Non-vested stock, grant | shares | 136,654
Estimated fair vaule | $ 11.5
Estimated compensation cost for next year | $ 5.7
Non-vested stock, vesting period | vest over a period of three to five years.

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