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Significant Accounting Policies (Narrative) (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Significant Accounting Policies [Abstract]          
Unrealized gain (loss) on palladium $ 37,846,898 $ 0 $ 0 $ 0  
Annualized rate of Sponsors Fee     0.60%    
Sponsor Fees 755,706 1,037,809 2,211,017 3,532,504  
Fees payable to the Sponsor $ 258,167   $ 258,167   $ 194,805 [1]
[1] Derived from audited Statement of Financial Condition as of December 31, 2011.