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LONG-TERM DEBT - Narrative (Details)
3 Months Ended
Oct. 14, 2022
USD ($)
aircraft
Mar. 31, 2023
USD ($)
aircraft
Mar. 31, 2022
USD ($)
Debt Instrument [Line Items]      
Number of aircraft | aircraft   1,500  
Amortization of deferred financing costs and debt discount   $ 915,000 $ 0
2022-1 Equipment Note Financing | Notes Payable      
Debt Instrument [Line Items]      
Face amount $ 270,000,000    
Stated rate 12.00%    
Net proceeds $ 259,200,000    
Principal amount, percentage 10.00%    
Minimum liquidity $ 125,000,000    
2022-1 Equipment Note Financing | Notes Payable | Asset Pledged as Collateral      
Debt Instrument [Line Items]      
Flight equipment   $ 323,400,000  
2022-1 Equipment Note Financing | Notes Payable | Collateral Pledged      
Debt Instrument [Line Items]      
Number of aircraft | aircraft 134