Share Capital and Capital Surplus - Changes in Issued Common Stock (Detail) - shares	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Disclosure of classes of share capital [abstract]
Shares issued beginning balance	82,624,377	84,571,230
Retirement of treasury shares	(1,691,425)	(1,946,853)
Shares issued ending balance	80,932,952	82,624,377
Treasury shares beginning balance	(7,003,598)	(8,695,023)
Retirement of treasury shares	1,691,425	1,946,853
Treasury shares ending balance	(5,312,173)	(7,003,598)
Number of outstanding shares beginning balance	75,620,779	75,876,207
Number of outstanding shares ending balance	75,620,779	75,620,779
Acquisition of treasury shares		(255,428)
Acquisition of treasury shares		(255,428)

The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 160
-Subparagraph a
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_160_a_iv&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph B10
-Subparagraph a
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B10_a_iv&doctype=Appendix&subtype=B
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 79
-Subparagraph a
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_79_a_iv&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_NumberOfSharesOutstanding
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant