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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	$ 5,049mux_CollectionOfValueAddedTaxesReceivable	$ 3,438mux_CollectionOfValueAddedTaxesReceivable	$ 720mux_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

X

- Details

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