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Commitments and Contingencies - Narrative (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2023
USD ($)
aircraft
Dec. 31, 2022
USD ($)
Long-term Purchase Commitment [Line Items]    
Number of aircraft on order with manufacturers | aircraft 351  
Purchase obligation $ 22,623,916  
Minimum aircraft delivery delays that could trigger lessee cancellation clauses 1 year  
Purchase agreements, termination commencement period 1 year  
Non-refundable deposits on aircraft $ 1,173,382 $ 1,344,973
Aircrafts    
Long-term Purchase Commitment [Line Items]    
Non-refundable deposits on aircraft $ 1,200,000 $ 1,300,000