Net defined benefit assets (liability) - Summary of Reconciliation of Net Employee Defined Benefit Liabilities (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of net defined benefit asset (liability) [line items]
Beginning balance	$ 504	$ (7,670)	$ (14,332)
Current service cost	(2,725)	(2,860)	(3,272)
Interest (cost) income	(74)	(250)	(249)
Past service cost	(13)	(16)	(191)
Curtailment / Settlement			0
Return on plan assets	(251)	172	416
Experience gain (loss)	80	(3,959)	602
Actuarial changes arising from changes in financial assumptions	2,295	10,874	4,411
Employer contributions	4,572	3,911	2,565
Benefits paid	970	325	520
Adjustments			2,422
Others	(12)	(23)	(562)
Ending balance	5,346	504	(7,670)
Defined benefit obligation
Disclosure of net defined benefit asset (liability) [line items]
Beginning balance	(30,332)	(34,593)	(39,466)
Current service cost	(2,725)	(2,860)	(3,272)
Interest (cost) income	(1,715)	(972)	(721)
Past service cost	(13)	(16)	(191)
Curtailment / Settlement			0
Return on plan assets	0	0	0
Experience gain (loss)	80	(3,959)	602
Actuarial changes arising from changes in financial assumptions	2,295	10,874	4,411
Employer contributions	0	0	0
Benefits paid	970	1,194	1,622
Adjustments			2,422
Others	0	0	0
Ending balance	(31,440)	(30,332)	(34,593)
Fair value of assets
Disclosure of net defined benefit asset (liability) [line items]
Beginning balance	31,197	27,413	25,783
Current service cost	0	0	0
Interest (cost) income	1,641	722	472
Past service cost	0	0	0
Curtailment / Settlement			0
Return on plan assets	(251)	172	416
Experience gain (loss)	0	0	0
Actuarial changes arising from changes in financial assumptions	0	0	0
Employer contributions	4,572	3,911	2,565
Benefits paid	0	(869)	(1,102)
Adjustments			0
Others	0	(152)	(721)
Ending balance	37,159	31,197	27,413
Other employee benefits liability
Disclosure of net defined benefit asset (liability) [line items]
Beginning balance	(361)	(490)	(649)
Current service cost	0	0	0
Interest (cost) income	0	0	0
Past service cost	0	0	0
Curtailment / Settlement			0
Return on plan assets			0
Experience gain (loss)	0	0	0
Actuarial changes arising from changes in financial assumptions	0	0	0
Employer contributions	0	0	0
Benefits paid	0	0	0
Adjustments			0
Others	(12)	129	159
Ending balance	$ (373)	$ (361)	$ (490)

The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2023-01-01
-Paragraph 141
-Subparagraph c
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- Definition

The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments that result in remeasurements of the net defined benefit liability (asset). Experience adjustments deal with the effects of differences between the previous actuarial assumptions and what has actually occurred. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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No definition available.

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- Definition

The decrease (increase) in the net defined benefit liability (asset) resulting from settlements. Settlements are transactions that eliminate all further legal or constructive obligations for part or all of the benefits provided under a defined benefit plan, other than a payment of benefits to, or on behalf of, employees that is set out in the terms of the plan and included in the actuarial assumptions. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]; Actuarial assumptions [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2023-01-01
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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from miscellaneous other changes. [Refer: Net defined benefit liability (asset); Increase (decrease) in net defined benefit liability (asset) resulting from expense (income) in profit or loss; Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2023-01-01
-Paragraph 141
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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Net defined benefit liability (asset)]

+ References

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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2023-01-01
-Paragraph 141
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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 [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 140
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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from past service cost. Past service cost is the change in the present value of the defined benefit obligation for employee service in prior periods, resulting from a plan amendment (the introduction or withdrawal of, or changes to, a defined benefit plan) or a curtailment (a significant reduction by the entity in the number of employees covered by a plan). [Refer: Net defined benefit liability (asset); Defined benefit plans [member]]

+ References

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- Definition

The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2023-01-01
-Paragraph 141
-Subparagraph g
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_g&doctype=Standard
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- Definition

The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets, excluding amounts included in interest income or expense. The return on plan assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [member]; Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 141
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