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Revenue from contract with customers - Operating Revenue by Principal Geographic Area (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of geographical areas [line items]      
Passenger, cargo and mail revenue $ 3,546,971 $ 3,393,868 $ 3,413,466
North America      
Disclosure of geographical areas [line items]      
Passenger, cargo and mail revenue 1,521,617 1,375,018 1,328,504
South America      
Disclosure of geographical areas [line items]      
Passenger, cargo and mail revenue 1,279,177 1,219,893 1,233,362
Central America      
Disclosure of geographical areas [line items]      
Passenger, cargo and mail revenue 696,032 747,871 796,679
Caribbean      
Disclosure of geographical areas [line items]      
Passenger, cargo and mail revenue $ 50,145 $ 51,086 $ 54,921