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Significant Accounting Policies (Disclosure of subsidiaries) (Details) | 12 Months Ended
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Dec. 31, 2017
Minera Bateas S.A.C. [member] |
Disclosure of subsidiaries [line items] |
Name of subsidiary | Minera Bateas S.A.C. ("Bateas")
Principal place of business of subsidiary | Peru
Proportion of ownership interest in subsidiary | 100.00%
Principal activity of subsidiary | Caylloma Mine
Compania Minera Cuzcatlan S.A. de C.V. [member] |
Disclosure of subsidiaries [line items] |
Name of subsidiary | Compania Minera Cuzcatlan S.A. de C.V. ("Cuzcatlan")
Principal place of business of subsidiary | Mexico
Proportion of ownership interest in subsidiary | 100.00%
Principal activity of subsidiary | San Jose Mine
Mansfield Minera S.A. [member] |
Disclosure of subsidiaries [line items] |
Name of subsidiary | Mansfield Minera S.A. ("Mansfield")
Principal place of business of subsidiary | Argentina
Proportion of ownership interest in subsidiary | 100.00%
Principal activity of subsidiary | Mine under construction

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