XML 48 R30.htm IDEA: XBRL DOCUMENT
v2.4.0.8

BUSINESS ACQUISITION (Details) (Minera Andes) | 0 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 24, 2012 | Sep. 30, 2013
Minera Andes |  |
BUSINESS ACQUISITION |  |
Exchange ratio | 0.45 |
Exchangeable shares issued | 127,331,498 |
Ratio for exchange of exchangeable shares |  | 1

X
- Definition Represents the exchange ratio to determine the number of shares of the acquirer that shareholders of acquiree entity will receive for each share held. + References No definition available. + Details
Name: | mux_BusinessAcquisitionShareExchangeRatio
Namespace Prefix: | mux_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of shares of common stock into which each unit of another convertible security can be converted. + References No definition available. + Details
Name: | mux_CommonStockConversionRatio
Namespace Prefix: | mux_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares of exchangeable stock issued during the period pursuant to acquisitions. + References No definition available. + Details
Name: | mux_ExchangeableStockIssuedDuringPeriodSharesAcquisitions
Namespace Prefix: | mux_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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