XML 47 R34.htm IDEA: XBRL DOCUMENT
v2.4.0.8

SHAREHOLDERS' EQUITY (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 item | Dec. 31, 2013 item
Exchangeable shares converted into common stock | 400,000 |
Outstanding Exchangeable Shares not exchanged | 31,800,000 |
Number of mining contractors with which the entity has entered into an agreement | 1 | 1
Number of shares required to be issued under the agreement | 156,500 |
Litigation settlement liabilities | $ 0.4 |
Maximum |  |
Number of shares to be issued to settle parts of expected future account payables |  | 2,500,000

X
- Definition Represents the fair value portion of litigation settlement liabilities. + References No definition available. + Details
Name: | mux_LitigationSettlementLiabilitiesFairValueDisclosure
Namespace Prefix: | mux_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the number of mining contractors with which the entity has entered into an agreement. + References No definition available. + Details
Name: | mux_NumberOfMiningContractorsWithWhichEntityHasEnteredIntoAgreement
Namespace Prefix: | mux_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of shares agreed to be issued by the entity under the agreement. + References No definition available. + Details
Name: | mux_NumberOfSharesAgreedToBeIssuedUnderAgreement
Namespace Prefix: | mux_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of shares to be issued to settle parts of expected future account payable of the entity. + References No definition available. + Details
Name: | mux_NumberOfSharesToBeIssuedToSettlePartsOfExpectedFutureAccountPayable
Namespace Prefix: | mux_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total number of shares of other common stock instruments held by shareholders, such as exchangeable shares. May be all or portion of the number of common shares authorized. + References No definition available. + Details
Name: | us-gaap_CommonStockOtherSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_ConversionOfStockSharesConverted1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration