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Revenue Recognition - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Revenue Recognition [Abstract]      
Contract with Customer, Liability, Current   $ 389,956 $ 353,488
Contract with Customer, Liability, Forward Bookings   34160000000.00%  
Contract with Customer, Liability, Credit Voucher Bookings   4840000000.00%  
Revenue, Performance Obligation, Description of Timing   12 months  
Air Traffic Liability, Recognized $ 353,500    
Air Traffic Liability, Revenue Recognition, Percentage   86.10%