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BUSINESS ACQUISITION (Details) (USD $)
In Millions, except Share data, unless otherwise specified
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0 Months Ended |
12 Months Ended |
6 Months Ended |
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Dec. 31, 2013
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Jan. 24, 2012
Minera Andes
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Dec. 31, 2013
Minera Andes
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Dec. 31, 2013
Minera Andes
Replacement options
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Jun. 30, 2011
Minera Andes
Robert R. McEwen
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Dec. 31, 2013
Minera Andes
Robert R. McEwen
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| BUSINESS ACQUISITION |
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| Exchange ratio |
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0.45 |
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| Exchangeable Shares received by shareholders of acquiree |
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127,331,498 |
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38,700,000 |
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| Shareholding of combined company by the then-existing McEwen Mining shareholders (as a percent) |
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52.00% |
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| Shareholding of combined company by former Minera Andes shareholders (as a percent) |
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48.00% |
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| Shareholding of combined company on a diluted basis by the then-existing McEwen Mining shareholders (as a percent) |
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53.00% |
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| Shareholding of combined company on a diluted basis by former Minera Andes shareholders (as a percent) |
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47.00% |
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| Percentage of shares of the company owned |
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25.00% |
| Outstanding Exchangeable Shares not exchanged |
32,200,000 |
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|
|
500,000 |
| Ratio for exchange of exchangeable shares |
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1 |
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| Estimated fair value of the vested portion of the replacement options |
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$ 3.2 |
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