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Schedule of Investments (oz, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Investment Holdings [Line Items]    
Investment in Gold (oz) 783,832.3us-gaap_InvestmentOwnedBalanceOtherMeasure 865,587.1us-gaap_InvestmentOwnedBalanceOtherMeasure
Average Cost $ 942,277us-gaap_InvestmentOwnedAtCost $ 1,040,003us-gaap_InvestmentOwnedAtCost
Fair Value 940,011us-gaap_InvestmentOwnedAtFairValue 1,040,003us-gaap_InvestmentOwnedAtFairValue
% of Net Assets 102.60%us-gaap_InvestmentOwnedPercentOfNetAssets [1] 100.61%us-gaap_InvestmentOwnedPercentOfNetAssets
Gold [Member]    
Investment Holdings [Line Items]    
Investment in Gold (oz) 783,832.3us-gaap_InvestmentOwnedBalanceOtherMeasure
/ us-gaap_CurrencyAxis
= currency_XAU		 865,587.1us-gaap_InvestmentOwnedBalanceOtherMeasure
/ us-gaap_CurrencyAxis
= currency_XAU
Average Cost 942,277us-gaap_InvestmentOwnedAtCost
/ us-gaap_CurrencyAxis
= currency_XAU		 1,040,003us-gaap_InvestmentOwnedAtCost
/ us-gaap_CurrencyAxis
= currency_XAU
Fair Value $ 940,011us-gaap_InvestmentOwnedAtFairValue
/ us-gaap_CurrencyAxis
= currency_XAU		 $ 1,040,003us-gaap_InvestmentOwnedAtFairValue
/ us-gaap_CurrencyAxis
= currency_XAU
% of Net Assets 102.60%us-gaap_InvestmentOwnedPercentOfNetAssets
/ us-gaap_CurrencyAxis
= currency_XAU		 [1] 100.61%us-gaap_InvestmentOwnedPercentOfNetAssets
/ us-gaap_CurrencyAxis
= currency_XAU		 [2]
[1] Calculated as investment in gold at fair value divided by net assets, as at December 31, 2014, investment in gold is recorded at fair value. Refer to Note 2.1 for additional information.
[2] Calculated as investment in gold at cost divided by net assets, as at December 31, 2013, investment in gold was recorded at the lower of cost or market value. Refer to Note 2.1 for additional information.