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Mineral Properties (Schedule Of Business Acquisitions By Acquisition) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Mineral properties net, Beginning balance	$ 13,701	$ 13,701
Mineral properties net, Ending balance	13,701	13,701
Long Valley, United States [Member]
Business Acquisition [Line Items]
Mineral properties net, Beginning balance	750	750
Mineral properties net, Ending balance	750	750
Los Cardones, Mexico [Member]
Business Acquisition [Line Items]
Mineral properties net, Beginning balance	8,053	8,053
Mineral properties net, Ending balance	8,053	8,053
Guadalupe de los Reyes, Mexico [Member]
Business Acquisition [Line Items]
Mineral properties net, Beginning balance	2,752	2,752
Mineral properties net, Ending balance	2,752	2,752
Mt. Todd, Australia [Member]
Business Acquisition [Line Items]
Mineral properties net, Beginning balance	2,146	2,146
Mineral properties net, Ending balance	$ 2,146	$ 2,146

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- Definition

Mineral properties, net of adjustments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 19

-Paragraph 15

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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