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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
CONSOLIDATED STATEMENTS OF CASH FLOWS |  |  |
Collection of VAT taxes receivable | $ 5,049 mux_CollectionOfValueAddedTaxesReceivable | $ 3,438 mux_CollectionOfValueAddedTaxesReceivable | $ 720 mux_CollectionOfValueAddedTaxesReceivable

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

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- Details
Name: | us-gaap_StatementOfCashFlowsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration