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RELATED PARTY TRANSACTIONS - Principal Subsidiaries (Details)	12 Months Ended
	Dec. 31, 2018
Marigold Mining Company
Disclosure of transactions between related parties [line items]
Proportion of ownership interest in subsidiary	100.00%
SGO Mining Inc. (formerly Claude Resources Inc.)
Disclosure of transactions between related parties [line items]
Proportion of ownership interest in subsidiary	100.00%
Puna Operations Inc.
Disclosure of transactions between related parties [line items]
Proportion of ownership interest in subsidiary	75.00%
SSR Durango, S.A. de C.V.
Disclosure of transactions between related parties [line items]
Proportion of ownership interest in subsidiary	100.00%
Intertrade Metals Limited Partnership
Disclosure of transactions between related parties [line items]
Proportion of ownership interest in subsidiary	100.00%

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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.

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No definition available.

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- Definition

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2018-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_17_b_iii&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2018-01-01
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-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_16_b_iii&doctype=Standard
-URIDate 2018-03-16

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2018-01-01
-Paragraph 19B
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_19B_c&doctype=Standard
-URIDate 2018-03-16

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