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MINERAL PROPERTY INTERESTS AND ASSET RETIREMENT OBLIGATIONS (Tables) | 9 Months Ended
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Sep. 30, 2013
MINERAL PROPERTY INTERESTS AND ASSET RETIREMENT OBLIGATIONS |
Summary of mineral property interests |
|  |  |  | Three Months Ended |  | Nine Months Ended |
|  |  |  | September 30, |  | September 30, |
Name of Property/Complex |  | Segment |  | 2013 |  | 2012 |  | 2013 |  | 2012 |
Telken Tenements |  | Argentina |  | $ | — |  | $ | — |  | $ | 13,792 |  | $ | — |
Este Tenements |  | Argentina |  | — |  | — |  | 2,784 |  | — |
Piramides Tenements |  | Argentina |  | — |  | — |  | 5,079 |  | — |
Tobias Tenements |  | Argentina |  | — |  | — |  | 6,074 |  | — |
West Battle Mountain Complex |  | Nevada |  | 6,287 |  | — |  | 6,287 |  | — |
Other United States Properties |  | Nevada |  | — |  | 2,902 |  | — |  | 2,902 |
Property, plant and equipment |  | Argentina |  | — |  | — |  | — |  | 179 |
Total impairment |  |  |  | $ | 6,287 |  | $ | 2,902 |  | $ | 34,016 |  | $ | 3,081 |
Schedule of changes in asset retirement obligations | Changes in the Company’s asset retirement obligations for the nine months ended September 30, 2013 and year ended December 31, 2012 are as follows (in thousands):
|  | Nine Months Ended |  | Year Ended |
|  | September 30, 2013 |  | December 31, 2012 |
Asset retirement obligation liability - opening balance |  | $ | 6,359 |  | $ | 6,253 |
Settlements |  | (56 | ) | (47 | )
Accretion of liability |  | 342 |  | 447 |
Adjustment reflecting updated estimates |  | (29 | ) | (294 | )
Asset retirement obligation liability - ending balance |  | $ | 6,616 |  | $ | 6,359 |

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- Definition Tabular disclosure of mineral properties held by the entity. + References No definition available. + Details
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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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