Related party disclosure (Details 1) - PEN (S/) S/ in Thousands	Dec. 31, 2017	Dec. 31, 2016
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

The amounts payable resulting from related party transactions. [Refer: Related parties [member]]

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

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- Definition

The amounts receivable resulting from related party transactions. [Refer: Related parties [member]]

+ References

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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.

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