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Asset Retirement and Reclamation Obligations (Details Textual) (USD $)
In Millions, unless otherwise specified |
3 Months Ended |
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Mar. 31, 2014
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| Estimated Future Cash Undiscounted Amount | $ 17.7 |
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Minimum [Member]
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| Discount Rate Of Asset Retirement Obligations | 0.30% |
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Maximum [Member]
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| Discount Rate Of Asset Retirement Obligations | 3.80% |
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- Definition
Discount Rate Of Asset Retirement Obligations No definition available.
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- Definition
Amount of estimated future cash undiscounted amount. No definition available.
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