XML 43 R23.htm IDEA: XBRL DOCUMENT
v2.4.0.8

INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2013
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |
Schedule of reconciliation of fair value allocation |
|  | For three months ended |  | For nine months ended |
|  | September 30, 2012 |  | September 30, 2012 |
|  | (in thousands) |
Amortization of fair value increments, as reported |  | $ | 1,597 |  | $ | 3,746 |
Adjustment |  | 71 |  | (209 | )
Amortization of fair value increments, as adjusted |  | $ | 1,668 |  | $ | 3,537 |
Net loss, as reported |  | $ | (2,583 | ) | $ | (40,578 | )
Adjustment |  | (71 | ) | 209 |
Net loss, as adjusted |  | $ | (2,654 | ) | $ | (40,369 | )
Schedule of change in the entity's investment in MSC |
|  | Nine Months Ended |  | Year Ended |
|  | September 30, 2013 |  | December 31, 2012 |
|  | (in thousands) |
Investment in MSC, beginning of period |  | $ | 273,948 |  | $ | — |
Fair value of investment in MSC from acquisition of Minera Andes |  | — |  | 262,883 |
Income from equity investment |  | 3,914 |  | 25,301 |
Amortization of fair value increments |  | (3,662 | ) | (4,466 | )
Dividend distribution |  | (1,242 | ) | (9,770 | )
Impairment of investment in MSC |  | (95,878 | ) | — |
Investment in MSC, end of period |  | $ | 177,080 |  | $ | 273,948 |
Summary of MSC's financial information from operations |
|  | Three Months Ended |  | Three Months Ended |  | Nine Months Ended |  | Period ended |
|  | September 30, 2013 |  | September 30, 2012 |  | September 30, 2013 |  | September 30, 2012 |
|  | (in thousands) |
Sales - MSC 100% |  | $ | 69,662 |  | $ | 116,299 |  | $ | 182,031 |  | $ | 212,902 |
Net income - MSC 100% |  | 5,424 |  | 26,343 |  | 7,988 |  | 37,765 |
McEwen Mining’s portion - 49% |  | 2,658 |  | 12,908 |  | 3,914 |  | 18,505 |
Net income on investment in MSC |  | $ | 2,658 |  | $ | 12,908 |  | $ | 3,914 |  | $ | 18,505 |
Amortization of fair value increments |  | (618 | ) | (1,668 | ) | (3,662 | ) | (3,537 | )
Income on investment in MSC, net of amortization |  | $ | 2,040 |  | $ | 11,240 |  | $ | 252 |  | $ | 14,968 |

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 including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + 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 + 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 250 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=28359718&loc=d3e22595-107794 Reference 2: 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 3: 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 4: 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=27015980&loc=d3e46468-122699 Reference 5: 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