v3.26.1
LONG-TERM DEBT - Narrative (Details)
 3 Months Ended
Apr. 26, 2026
shares
Nov. 13, 2024
USD ($)
Nov. 15, 2023
USD ($)
Sep. 20, 2023
USD ($)
shares
Mar. 31, 2026
USD ($)
aircraft
Mar. 31, 2025
USD ($)
May 11, 2026
USD ($)
Dec. 31, 2023
USD ($)
Debt Instrument [Line Items]                
Amortization of deferred financing costs and debt discount         $ 8,996,000 $ 1,893,000    
Proceeds from long-term debt         100,738,000 9,876,000    
Long-term debt         749,040,000      
Term Loan                
Debt Instrument [Line Items]                
Long-term debt fair value               $ 44,900,000
Fair value allocation               9,400,000
Initial Issuance                
Debt Instrument [Line Items]                
Allocation on relative fair value basis               64,200,000
Issuance costs       $ 25,400,000        
Deferred Issuance                
Debt Instrument [Line Items]                
Common stock issued (in shares) | shares       529,926,270        
Allocation on relative fair value basis               240,900,000
Deferred Issuance | Subsequent Event                
Debt Instrument [Line Items]                
Common stock issued (in shares) | shares 26,496,261              
Private Placement, Reallocated Shares                
Debt Instrument [Line Items]                
Deferred issuance costs               $ 30,600,000
Term Loan                
Debt Instrument [Line Items]                
Issuance costs       $ 4,100,000        
Common Stock | Initial Issuance                
Debt Instrument [Line Items]                
Common stock issued (in shares) | shares       141,313,671        
Common Stock | Initial Issuance | Subsequent Event                
Debt Instrument [Line Items]                
Common stock issued (in shares) | shares 7,065,683              
Revolving Equipment Notes | Notes Payable                
Debt Instrument [Line Items]                
Aggregate original principal amount   $ 332,000,000.0            
Aggregate principal amount   $ 331,300,000            
Debt instrument gross proceeds (in percent)   98.75%            
Amortization of deferred financing costs and debt discount         $ 0 200,000    
Revolving Equipment Notes | Notes Payable | Aircraft                
Debt Instrument [Line Items]                
Number of aircraft | aircraft         55      
Revolving Equipment Notes | Notes Payable | Closing Date to the end of the Availability Period                
Debt Instrument [Line Items]                
Debt instrument spread on variable rate (in percent)   1.75%            
Revolving Equipment Notes | Notes Payable | Immediately after Availability Period to November 13, 2028                
Debt Instrument [Line Items]                
Debt instrument spread on variable rate (in percent)   2.25%            
Revolving Equipment Notes | Notes Payable | November 13, 2028 to Maturity                
Debt Instrument [Line Items]                
Debt instrument spread on variable rate (in percent)   2.75%            
Revolving Equipment Notes | Notes Payable | Period One                
Debt Instrument [Line Items]                
Annual amortization of principal percent (in percent)   10.00%            
Revolving Equipment Notes | Notes Payable | Period Two                
Debt Instrument [Line Items]                
Annual amortization of principal percent (in percent)   12.00%            
Revolving Equipment Notes | Notes Payable                
Debt Instrument [Line Items]                
Aircraft for redemption | aircraft         9      
Debt redeemed         $ 31,900,000      
Revolving Equipment Notes | Notes Payable | Asset Pledged as Collateral                
Debt Instrument [Line Items]                
Flight equipment         $ 238,000,000.0      
New Revolving Equipment Notes | Notes Payable                
Debt Instrument [Line Items]                
Aircraft for redemption | aircraft         9      
Debt redeemed         $ 60,700,000      
Credit Agreement                
Debt Instrument [Line Items]                
Issuance costs       $ 29,500,000        
Credit Agreement | Term Loan and Revolving Credit Facility | Revolving Credit Facility                
Debt Instrument [Line Items]                
Aggregate original principal amount     $ 100,000,000.0 100,000,000.0        
Remaining borrowing capacity         60,000,000.0      
Unrestricted cash required     100,000,000.0          
Credit Agreement | Term Loan and Revolving Credit Facility | Revolving Credit Facility | Subsequent Event                
Debt Instrument [Line Items]                
Remaining borrowing capacity             $ 0  
Credit Agreement | Term Loan and Revolving Credit Facility | Revolving Credit Facility | Indirect Guarantee of Indebtedness                
Debt Instrument [Line Items]                
Aggregate original principal amount         100,000,000.0      
Credit Agreement | Term Loan and Revolving Credit Facility | Term Loan                
Debt Instrument [Line Items]                
Amortization of deferred financing costs and debt discount         8,900,000 $ 1,600,000    
Face amount     390,000,000.0 350,000,000.0 $ 390,000,000.0      
Proceeds from long-term debt     39,200,000 $ 343,000,000.0        
Increment principal amount     40,000,000.0          
Stated rate (in percent)       10.00%        
Credit agreement interest rate (in percent)       2.00%        
Long-term debt     8,700,000 $ 41,400,000        
Unamortized debt issuance costs     700,000 3,400,000        
Unamortized debt discount     $ 30,600,000 $ 305,200,000