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Net defined benefit assets (liability) - Summary of Components of Net Benefit Expense (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of net defined benefit asset (liability) [line items]      
Current service cost $ 2,690 $ 2,725 $ 2,860
Interest cost on net benefit obligation (190) 74 250
Past service cost 62 13 16
Net periodic benefit cost (income) 2,562 2,812 3,126
Defined benefit obligation      
Disclosure of net defined benefit asset (liability) [line items]      
Current service cost 2,690 2,725 2,860
Interest cost on net benefit obligation 2,015 1,715 972
Past service cost 62 13 16
Net periodic benefit cost (income) 4,767 4,453 3,848
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 (2,205) (1,641) (722)
Past service cost 0 0 0
Net periodic benefit cost (income) $ (2,205) $ (1,641) $ (722)