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AIRCRAFT - Additional Information (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2025
USD ($)
aircraft
Mar. 31, 2024
aircraft
Dec. 31, 2024
aircraft
Dec. 31, 2023
aircraft
Mar. 31, 2023
aircraft
AIRCRAFT - Owned and Leased          
Number of aircraft 66 63 63 60  
Expiration period 4 years        
Additions 3 3      
Number of aircraft of finance lease   2      
Reclassifications 0 0      
Number of aircraft owned and refinanced 38        
Revolving Credit Facility          
AIRCRAFT - Owned and Leased          
Maximum borrowing capacity | $ $ 75,000        
Boeing 737-800          
AIRCRAFT - Owned and Leased          
Number of aircraft 61        
B-737-900          
AIRCRAFT - Owned and Leased          
Number of aircraft 5        
Passenger          
AIRCRAFT - Owned and Leased          
Number of aircraft 45 44 45 42  
Number of aircrafts financed 31        
Number of aircrafts unencumbered 2        
Number of aircrafts to support revolving credit facility 5        
Additions 0 2      
Reclassifications 0 0      
Passenger | Owned          
AIRCRAFT - Owned and Leased          
Number of aircraft 34 30 34 29  
Additions 0 1      
Reclassifications 0 0      
Other Property | Subleased Aircraft          
AIRCRAFT - Owned and Leased          
Number of aircraft 2 2 2 1  
Additions 0 1      
Reclassifications 0 0      
Other Property | Owned Aircraft Held for Operating Lease          
AIRCRAFT - Owned and Leased          
Number of aircraft with expiring lease term 3        
Number of aircraft   5   5  
Additions   0      
Reclassifications   0      
Other Property | Owned Aircraft Held for Operating Lease          
AIRCRAFT - Owned and Leased          
Number of aircraft 4   4   5
Additions 0        
Reclassifications 0        
Cargo | Aircrafts Operated For Amazon          
AIRCRAFT - Owned and Leased          
Number of additional aircrafts 3        
Number of aircrafts in-service 1        
Number of aircraft 15 12 12 12  
Additions 3 0      
Reclassifications 0 0