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Rotable spare parts, furniture and equipment, net - Additional Information (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
May 12, 2020
engine
Aug. 16, 2013
engine
Oct. 31, 2021
engine
Apr. 30, 2021
engine
Oct. 31, 2020
item
Jul. 31, 2020
item
Nov. 30, 2018
aircraft
item
Dec. 31, 2017
aircraft
Nov. 30, 2015
engine
Dec. 31, 2023
USD ($)
aircraft
Dec. 31, 2022
USD ($)
aircraft
Dec. 31, 2021
USD ($)
aircraft
Dec. 31, 2017
USD ($)
Dec. 31, 2011
aircraft
Rotable spare parts, furniture and equipment, net                            
Rate used to determine amount of borrowing cost                   8.85% 5.34%      
Depreciation expense | $                   $ 127,401 $ 90,790 $ 50,297    
Number of spare engines purchased | engine 11   1           3          
Number of aircraft engines to be provided maintenance services | engine     13 2         16          
Credit notes received | $                         $ 3,100  
Accumulated amortization of credit notes | $                   216 225 241    
Number of aircraft to be delivered | item         18 80 26              
Amounts paid for aircraft and spare engines | $                   $ 480,753 347,147 186,121    
Total number of aircraft to be delivered                   141        
Gain (loss) on sale and leaseback | $                   $ 8,275 21,193 9,668    
Term of aircraft delivery agreement                   8 years        
Carrying amount of remaining owned aircraft | $                   $ 804,610 478,771 454,602    
Not later than one year                            
Rotable spare parts, furniture and equipment, net                            
Total number of aircraft to be delivered                   10        
Later Than One Year And Not Later Than Two Years                            
Rotable spare parts, furniture and equipment, net                            
Total number of aircraft to be delivered                   23        
Between two and three years                            
Rotable spare parts, furniture and equipment, net                            
Total number of aircraft to be delivered                   29        
Between four and five years                            
Rotable spare parts, furniture and equipment, net                            
Total number of aircraft to be delivered                   21        
Between five and six years                            
Rotable spare parts, furniture and equipment, net                            
Total number of aircraft to be delivered                   19        
Between six and seven years                            
Rotable spare parts, furniture and equipment, net                            
Total number of aircraft to be delivered                   14        
Between seven and eight years                            
Rotable spare parts, furniture and equipment, net                            
Total number of aircraft to be delivered                   25        
Lufthansa Technik AG - Agreement                            
Rotable spare parts, furniture and equipment, net                            
Credit notes received | $                   $ 5,000     $ 1,500  
Accumulated amortization of credit notes | $                   519 $ 452 $ 258    
Term of total support agreement               66 months            
A320 model                            
Rotable spare parts, furniture and equipment, net                            
Number of aircraft purchased               80     25 39   44
A320CEO model                            
Rotable spare parts, furniture and equipment, net                            
Number of aircraft purchased                           14
Number of engines purchased | engine   14                        
Number of spare engines purchased | engine   1                        
A320NEO model                            
Rotable spare parts, furniture and equipment, net                            
Number of aircraft purchased               46           30
Number of engines purchased | engine 46 30                        
Number of spare engines purchased | engine   6             2          
Number of aircraft engines to be provided maintenance services | engine                 10          
A321NEO model                            
Rotable spare parts, furniture and equipment, net                            
Number of aircraft purchased 34             34            
Number of spare engines purchased | engine                 1          
Number of aircraft engines to be provided maintenance services | engine                 6          
A320NEO Into A321NEO                            
Rotable spare parts, furniture and equipment, net                            
Number of aircraft purchased             6         20    
Pre-delivery payments                            
Rotable spare parts, furniture and equipment, net                            
Amounts paid for aircraft and spare engines | $                   230,400 $ 166,600      
Carrying amount of remaining owned aircraft | $                   389,380 185,455 $ 253,826    
Spare engine leases | Pratt and Whitney purchase agreement (FMP)                            
Rotable spare parts, furniture and equipment, net                            
Amounts paid for aircraft and spare engines | $                   $ 85,182 $ 20,120