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Fair Value Of Financial Instruments (Assets Measured At Fair Value By Level Within The Fair Value Hierarchy) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Cash Equivalents	$ 15,834	$ 14,802
Marketable securities	626	986
Other Investments (Midas Gold shares)	69,489
Long Term Investments (Midas Gold shares)		119,851
Amayapampa interest (Note 7)	4,813	4,813
Mill Equipment	10,000
Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Cash Equivalents	15,834	14,802
Marketable securities	626	986
Other Investments (Midas Gold shares)	69,489
Long Term Investments (Midas Gold shares)		119,851
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Amayapampa interest (Note 7)	4,813	4,813
Mill Equipment	$ 10,000

X

- Definition

Represents the sum of the carrying value of all the Assets Held-for-Sale at the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760



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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 47

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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- Definition

The aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for noncurrent assets (assets with expected useful life longer than one year or one operating cycle, whichever is longer) of a disposal group, including a component of the entity (discontinued operation), to be sold or that has subsequently been disposed of through sale, as of the financial statement date.

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- Definition

Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale which are intended to be held for less than one year or the normal operating cycle, whichever is longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

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-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765



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- Definition

Other investments not otherwise specified in the taxonomy.

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The amount of cash equivalent instruments at a given point in time. This amount doesn't include cash.

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No definition available.

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- Definition

The fair value of an investment in a subsidiary at a point in time.

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