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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
CONSOLIDATED STATEMENTS OF CASH FLOWS |  |  |
Collection of VAT taxes receivable | $ 9,523 | $ 6,025 | $ 5,049

X
- Definition Represents information pertaining to collection of value added taxes receivable. + References No definition available. + Details
Name: | mux_CollectionOfValueAddedTaxesReceivable
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StatementOfCashFlowsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration