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Expendable parts and supplies - Disclosure of Expendable Parts and Supplies (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Classes of current inventories [abstract]    
Material for repair and maintenance $ 127,364 $ 111,938
Other inventories 5,079 4,768
Expendable parts and supplies, gross 132,443 116,706
Allowance for obsolescence (102) (102)
Expendable parts and supplies $ 132,341 $ 116,604