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REVENUE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	$ 853,089	$ 606,850
Gold bullion and doré sales
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	750,457	461,463
Concentrate sales
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	105,351	144,861
Other
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	$ (2,719)	$ 526

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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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- Definition

The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2020-01-01
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