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Schedule of Investments (oz, USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Investments [Abstract]
Investment in Gold (oz)	768,387.9us-gaap_InvestmentOwnedBalanceOtherMeasure	783,832.3us-gaap_InvestmentOwnedBalanceOtherMeasure
Average Cost	$ 924,736us-gaap_InvestmentOwnedAtCost	$ 942,277us-gaap_InvestmentOwnedAtCost
Fair Value	$ 912,076us-gaap_InvestmentOwnedAtFairValue	$ 940,011us-gaap_InvestmentOwnedAtFairValue
% of Net Assets	99.40%us-gaap_InvestmentOwnedPercentOfNetAssets	102.60%us-gaap_InvestmentOwnedPercentOfNetAssets

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Cost of the investment.

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Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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Quantity of the investment. Indicate the measure in the unit of measure. This is commonly used for investments other than securities. For example, if the investment is gold, the balance would be the number of ounces and the unit of measure would indicate "ounces".

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