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Significant Accounting Policies (Schedule Of Unrealized Gains Or Losses On The Trust's Palladium Holdings) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Jan. 01, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Significant Accounting Policies [Abstract]          
Investment in palladium - cost $ 335,517us-gaap_InvestmentOwnedAtCost   $ 463,598us-gaap_InvestmentOwnedAtCost    
Unrealized gain on investment in palladium 75,146pall_UnrealizedGainLossOnInvestmentInBullion   46,877pall_UnrealizedGainLossOnInvestmentInBullion    
Investment in palladium - fair value $ 410,663us-gaap_InvestmentInPhysicalCommodities [1],[2] $ 510,475us-gaap_InvestmentInPhysicalCommodities $ 510,475us-gaap_InvestmentInPhysicalCommodities $ 445,038us-gaap_InvestmentInPhysicalCommodities $ 351,083us-gaap_InvestmentInPhysicalCommodities
[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.
[2] At December 31, 2014, the investment in palladium is valued at fair value. At December 31, 2013 the investment in palladium was valued at the lower of cost or market value. Refer to note 2.1 for a breakdown of cost and fair value of the investment in palladium.