Investment property - Summary of gain on investment properties (Detail) - PEN (S/)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disclosure of detailed information about investment property [abstract]
Gain on valuation of investment property	S/ 101,104,000	S/ 60,260,000	S/ 7,111,000
Income from rental of investment property	81,484,000	71,080,000	65,961,000
Loss on sale		(3,176,000)
Total	S/ 182,588,000	S/ 128,164,000	S/ 73,072,000

The gains (losses) from changes in the fair value of investment property. [Refer: Investment property]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 40
-IssueDate 2025-01-01
-Paragraph 76
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=40&code=ifrs-tx-2025-en-r&anchor=para_76_d&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 269
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_269_d&doctype=Standard
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 269
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_269_d&doctype=Standard
-URIDate 2025-03-27

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