Employee benefits - Summary of obligations for defined benefit plans (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disclosure of net defined benefit liability (asset) [line items]
Amounts at beginning of year	$ (15,968)	$ (5,703)
Items classified as loss or profit
Cost of interest	(784)	(476)	$ (639)
Cost of services	(4)	(13)	(25)
Items classified in other comprehensive income
Actuarial remeasurement gain (losses)	36	(10,200)
Payment of contributions	494	424
Amounts at end of year	(16,226)	(15,968)	(5,703)
Present value of the obligation [member]
Disclosure of net defined benefit liability (asset) [line items]
Amounts at beginning of year	(20,546)	(11,295)
Items classified as loss or profit
Cost of interest	(993)	(712)
Cost of services	(4)	(13)
Items classified in other comprehensive income
Actuarial remeasurement gain (losses)	184	(10,331)
Payment of contributions	1,840	1,805
Amounts at end of year	(19,519)	(20,546)	(11,295)
Fair value of plan assets [member]
Disclosure of net defined benefit liability (asset) [line items]
Amounts at beginning of year	4,578	5,592
Items classified as loss or profit
Cost of interest	209	236
Cost of services	0	0
Items classified in other comprehensive income
Actuarial remeasurement gain (losses)	(148)	131
Payment of contributions	(1,346)	(1,381)
Amounts at end of year	$ 3,293	$ 4,578	$ 5,592

The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)]

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- Definition

The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]]

+ References

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The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)]

+ References

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- Definition

The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]]

+ References

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Items classified in other comprehensive income.

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