XML 45 R32.htm IDEA: XBRL DOCUMENT
v2.4.0.6

INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |
Schedule of reconciliation of fair value allocation |
|  | For three months ended March 31, 2012 |  | For three months ended June 30, 2012 |  | For the three months ended September 30, 2012 |
--- | --- | --- | --- | --- | --- | --- | ---
|  | (in thousands) |
Amortization of fair value increments, as reported |  | $ | 2,804 |  | $ | 1,803 |  | $ | 1,597 |
Adjustment |  |  | (1,851 | ) |  | (887 | ) |  | 71 |
Amortization of fair value increments, as adjusted |  | $ | 953 |  | $ | 916 |  | $ | 1,668 |
Net loss, as reported |  | $ | (19,202 | ) | $ | (21,251 | ) | $ | (2,583 | )
Adjustment |  |  | 1,851 |  |  | 887 |  |  | (71 | )
Net loss, as adjusted |  | $ | (17,351 | ) | $ | (20,364 | ) | $ | (2,654 | )
Schedule of change in the entity's investment in MSC |
|  | As at December 31, 2012 |
--- | --- | --- | ---
|  | (in thousands) |
Investment in MSC, beginning of period |  | $ | — |
Fair value of investment in MSC from acquisition of Minera Andes |  |  | 262,883 |
Income from equity investment |  |  | 25,301 |
Amortization of fair value increments |  |  | (4,466 | )
Dividend distribution |  |  | (9,770 | )
Investment in MSC, end of period |  | $ | 273,948 |
Summary of MSC's financial information from operations |
|  | Period Ended December 31, 2012 |
--- | --- | --- | ---
|  | (in thousands) |
Summary of MSC's financial information from operations |  |  |  |
Sales—MSC 100% |  | $ | 290,848 |
Net income—MSC 100% |  |  | 51,634 |
McEwen Mining's portion—49% |  |  | 25,301 |
Net income on investment in MSC |  | $ | 25,301 |
Amortization of fair value increments |  |  | (4,466 | )
Income on investment in MSC, net of amortization |  | $ | 20,835 |

X
- Definition Tabular disclosure of MSC's financial information from operations. + References No definition available. + Details
Name: | mux_EquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTableTextBlock
Namespace Prefix: | mux_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of equity method investments in common stock. The disclosure may include: (a) the name of each investee or group of investments for which combined disclosure is appropriate, (2) the percentage ownership of common stock, (3) the difference, if any, between the carrying amount of an investment and the value of the underlying equity in the net assets and the accounting treatment of difference, if any, and (4) the aggregate value of each identified investment based on its quoted market price, if available. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_EquityMethodInvestmentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the change in an accounting estimate, including a change that occurs in an interim period. If a change in accounting estimate affects several future periods (for example, a change in the service life of a depreciable asset) disclose the effect on income from continuing operations, net income (or other appropriate captions of changes in the applicable net assets or performance indicator), and any related per-share amounts of the current period. Disclosure of the effects of a change in an accounting estimate that occurs in the ordinary course of business (such as uncollectible accounts or inventory obsolescence) is not required, unless the effect is material. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(a)(5)) -URI http://asc.fasb.org/extlink&oid=6958853&loc=d3e46468-122699 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 28 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22595-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 154 -Paragraph 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e777-108305 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6368906&loc=d3e21843-107793 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 01 -Paragraph a -Subparagraph 5 -Article 10 + Details
Name: | us-gaap_ScheduleOfChangeInAccountingEstimateTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration