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Expendable parts and supplies - Disclosure of Expendable Parts and Supplies (Detail) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Classes of current inventories [abstract]    
Material for repair and maintenance $ 144,062 $ 127,364
Other inventories 4,167 5,079
Expendable parts and supplies, gross 148,229 132,443
Allowance for obsolescence (102) (102)
Expendable parts and supplies $ 148,127 $ 132,341