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Net defined benefit assets (liabilities) - Summary of Components of Net Benefit Expense (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of net defined benefit asset (liability) [line items]      
Current service cost $ 3,452 $ 2,690 $ 2,725
Interest cost on net benefit obligation 161 (190) 74
Past service cost   62 13
Net periodic benefit cost (income) 3,613 2,562 2,812
Defined benefit obligation      
Disclosure of net defined benefit asset (liability) [line items]      
Current service cost 3,452 2,690 2,725
Interest cost on net benefit obligation 1,948 2,015 1,715
Past service cost   62 13
Net periodic benefit cost (income) 5,400 4,767 4,453
Fair value of assets      
Disclosure of net defined benefit asset (liability) [line items]      
Current service cost 0 0 0
Interest cost on net benefit obligation (1,787) (2,205) (1,641)
Past service cost   0 0
Net periodic benefit cost (income) $ (1,787) $ (2,205) $ (1,641)