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Loans and borrowings - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Sep. 18, 2023
USD ($)
shares
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
shares
Jul. 14, 2023
shares
Apr. 30, 2020
USD ($)
Disclosure of detailed information about borrowings [line items]            
Debt including current maturities   $ 1,980,441 $ 1,670,807      
Conversion ratio per $1,000 principal amount of Notes (in shares) | shares         0.0201603  
Share settlement convertible notes       $ 349,495    
Shares settlement convertible notes, not converted by holders $ 349,000          
Remeasurement of convertible notes       87,900    
Net change in fair value of derivatives   $ (4,325) 4,469 $ (98,347)    
Class A common stock            
Disclosure of detailed information about borrowings [line items]            
Share settlement convertible notes (in shares) | shares (3,700,000)     (3,694,845)    
Bottom of range            
Disclosure of detailed information about borrowings [line items]            
Support from Export-Import Bank for net purchase price of aircraft   80.00%        
Top of range            
Disclosure of detailed information about borrowings [line items]            
Support from Export-Import Bank for net purchase price of aircraft   85.00%        
Export-Import Bank of United States            
Disclosure of detailed information about borrowings [line items]            
Outstanding indebtedness   $ 336,100 376,700      
Senior Convertible Notes            
Disclosure of detailed information about borrowings [line items]            
Principal amount           $ 350,000
Effective interest rates of borrowings           4.50%
Number of trading days immediately before maturity date           40 days
Conversion price percentage           1.30
Percentage redemption price on convertible notes 1          
Shares settlement convertible notes, not converted by holders $ 1,000          
Fair value of the embedded derivative at initial recognition       $ 98,300    
Finance lease | Long term fixed rate debt            
Disclosure of detailed information about borrowings [line items]            
Debt including current maturities   726,800 700,700      
Finance lease | Long term variable rate debt            
Disclosure of detailed information about borrowings [line items]            
Debt including current maturities   $ 917,500 $ 593,400