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Available-for-sale financial investments (Details) - PEN (S/) S/ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Movement In Available-For-Sale Financial Investments [Roll Forward] |  |  |
Beginning balance | S/ 657 | S/ 436 |
Fair value change recorded in other comprehensive income | 37 | 221 | S/ (308)
Ending balance | 21,206 | 657 | 436
Financial Assets Available-for-Sale, Category [Member] |  |  |
Movement In Available-For-Sale Financial Investments [Roll Forward] |  |  |
Beginning balance | 657 | 436 | 744
Investment shares from spin-off, note 1.1 | 21,206 |  |
Fair value change recorded in other comprehensive income | 37 | 221 | (308)
Disposals (c) | (694) |  |
Ending balance | S/ 21,206 | S/ 657 | S/ 436

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- Definition The amounts removed from equity and adjusted against the fair value of financial assets on reclassification out of the fair value through other comprehensive income measurement category, net of tax. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 9 -IssueDate 2017-01-01 -Paragraph 5.6.5 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=9&date=2017-03-01&anchor=para_5.6.5&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The fair value of financial assets. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of other comprehensive income, net of tax, related to available-for-sale financial assets. [Refer: Financial assets available-for-sale; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-02&anchor=para_91_a&doctype=Standard&book=B -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-02&anchor=para_7&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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