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Significant Accounting Policies (Narrative) (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Significant Accounting Policies [Abstract]          
Percentage of palladium held by the Zurich Sub-Custodian 46.00%   46.00%    
Basket of shares     50,000    
Fair value transfers $ 0   $ 0   $ 0
Reserve for uncertain tax positions $ 0   $ 0   0
Annualized rate of Sponsors Fee [1] 0.60% 0.60% 0.60% 0.60%  
Sponsor Fees $ 297,956 $ 398,004 $ 820,446 $ 1,470,392  
Fees payable to Sponsor 100,920   100,920   $ 97,509
All other expenses $ 0 $ 0 $ 0 $ 0  
[1] Annualized for periods of less than one year.