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Significant Accounting Policies (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Significant Accounting Policies [Abstract]      
Minimum block of shares issued redeemed against gold 50,000    
Annualized rate of sponsors fee 0.39%    
Sponsor fees $ 7,200,166 $ 5,855,861 $ 2,539,882
Fees payable to the Sponsor $ 630,835 $ 560,620