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Environmental And Mine Closure Obligations (Tables)
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Sep. 30, 2012
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| Environmental Remediation Obligations [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary Of Mine Closure Obligations |
The following is a summary of the obligations as of September 30, 2012 and the year ended December 31, 2011:
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| Asset Retirement Obligation Disclosure |
The following represents a rollforward of our asset retirement obligation liability related to our active mining locations for the nine months ended September 30, 2012 and the year ended December 31, 2011:
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- 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tabular disclosure of environmental loss contingencies by individual site. Does not include loss contingencies that are not environmental in nature. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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