Mineral Properties - Additional Disclosure (Details) - USD ($) $ in Millions |
12 Months Ended | |
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Dec. 31, 2013 |
Dec. 31, 2005 |
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| Nfu wyoming Llc | ||
| Mineral Properties | ||
| Percentage Of Asset Acquired | 100.00% | |
| Aggregate Consideration | $ 20.0 | |
| Pathfinder properties | ||
| Mineral Properties | ||
| Percentage Of Asset Acquired | 100.00% | |
| Aggregate Consideration | $ 6.7 | |
| Estimated Asset Reclamation Obligation | $ 5.7 | |
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- References No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of contingent consideration recognized as part of consideration transferred in asset acquisition. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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