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Significant Accounting Policies (Narrative) (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Significant Accounting Policies [Abstract]      
Reserve for uncertain tax positions $ 0us-gaap_LiabilityForUncertainTaxPositionsNoncurrent   $ 0us-gaap_LiabilityForUncertainTaxPositionsNoncurrent
Annualized rate of Sponsors Fee 0.60%pall_AnnualizedRateOfSponsorsFee 0.60%pall_AnnualizedRateOfSponsorsFee  
Sponsor Fees 548,386us-gaap_SponsorFees 753,558us-gaap_SponsorFees  
Fees payable to Sponsor 173,824us-gaap_AccountsPayableRelatedPartiesCurrent   212,592us-gaap_AccountsPayableRelatedPartiesCurrent
All other expenses $ 0us-gaap_OtherCostAndExpenseOperating $ 0us-gaap_OtherCostAndExpenseOperating