Finance costs and finance revenues (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2017	Aug. 18, 2014
Percentage of voting equity interests acquired	5.00%
Contingent consideration arrangements and indemnification assets recognised as of acquisition date	$ 23,026,000
Royalty rate	1.50%
Minera Gold Fields Peru S.A [Member]
Percentage of voting equity interests acquired		51.00%

The amount recognised as of the acquisition date for contingent consideration arrangements assumed and indemnification assets acquired in a business combination. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2017-01-01
-Paragraph B64
-Subparagraph g
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_g_i&doctype=Appendix&seq=2
-URIDate 2017-03-09

Name:	ifrs-full_ContingentConsiderationArrangementsAndIndemnificationAssetsRecognisedAsOfAcquisitionDate
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant