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Significant Accounting Policies (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Significant Accounting Policies [Abstract]      
Minimum block of shares issued redeemed against palladium 50,000pall_MinimumBlockOfSharesIssuedRedeemedAgainstBullion    
Annualized rate of Sponsors Fee 0.60%pall_AnnualizedRateOfSponsorsFee [1]    
Sponsor Fees $ 2,983,221us-gaap_SponsorFees $ 3,297,191us-gaap_SponsorFees $ 2,943,626us-gaap_SponsorFees
Fees payable to Sponsor $ 212,592us-gaap_AccountsPayableRelatedPartiesCurrent $ 260,849us-gaap_AccountsPayableRelatedPartiesCurrent  
[1] Effective January 1, 2014, the Trust has adopted the provisions of Topic 946, Investment Companies, and follows specialized accounting. Refer to Note 2.1 for additional information.