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Related party disclosure (Details 1) - PEN (S/) S/ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Disclosure of transactions between related parties [line items] |  |
Accounts receivable | S/ 1,372 | S/ 704
Accounts payable | 516 |
Inversiones ASPI S.A. (ASPI) [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Accounts receivable | 641 | 109
Accounts payable |  |
Compania Minera Ares S.A.C. (Ares) [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Accounts receivable | 339 | 569
Accounts payable | 516 |
Other Related Parties [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Accounts receivable | 392 | 26
Accounts payable |  |

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- Definition The amounts payable resulting from related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2017-01-01 -Paragraph 20 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2017-03-01&anchor=para_20&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2017-01-01 -Paragraph 18 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2017-03-01&anchor=para_18_b&doctype=Standard -URIDate 2017-03-09 + Details
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Period Type: | instant

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- Definition The amounts receivable resulting from related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2017-01-01 -Paragraph 20 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2017-03-01&anchor=para_20&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2017-01-01 -Paragraph 18 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2017-03-01&anchor=para_18_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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