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Commitments and Contingencies Narrative (Details) (USD $) In Thousands, unless otherwise specified	24 Months Ended
	Dec. 31, 2009	Sep. 30, 2012 oz
Commitments and Contingencies Disclosure [Abstract]
Forward sales commitments gold (ounces)		4,000
Forward sales commitments silver (ounces)		54,000
Assessed duties on certain cross border remelting transactions	$ 634

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- Definition

United States Customs and Border Protection Agency assessed duties on certain cross-border remelting transactions

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Forward sales commitments to sell gold

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- Definition

Forward sales commitments to sell silver

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