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Commitments and contingencies - Schedule of Prepayments of Flight Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]    
Prepayments on flight equipment at beginning of period $ 4,586,848 $ 2,111,659
GECAS Transaction 0 2,990,414
Prepayments and additions during the period, net 244,937 136,655
Interest paid and capitalized during the period 104,191 30,827
Prepayments and capitalized interest applied to the purchase of flight equipment (1,129,374) (682,707)
Prepayments on flight equipment at end of period $ 3,806,602 $ 4,586,848