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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
CONSOLIDATED STATEMENTS OF CASH FLOWS
Collection of VAT taxes receivable	$ 2,746mux_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