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Significant Accounting Policies (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Significant Accounting Policies [Abstract]          
Percentage of palladium held by the Zurich Sub-Custodian 53.00%   53.00%    
Basket of shares     50,000    
Minimum block of shares issued redeemed against palladium     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 $ 301,354 $ 269,749 $ 593,250 $ 522,490  
Fees payable to Sponsor 101,501   $ 101,501   $ 89,977
All other expenses $ 0 $ 0      
[1] Annualized for periods of less than one year.