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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
Sep. 30, 2013
Dec. 31, 2012
Dec. 31, 2011
Significant Accounting Policies [Abstract]      
Investment in palladium - average cost $ 490,327 [1] $ 445,038 [1],[2] $ 351,083
Unrealized gain on investment in palladium 63,661 52,982  
Investment in palladium - market value $ 553,988 $ 498,020  
[1] The investment in palladium is valued at the lower of cost or market value. Refer to note 2.1 for a breakdown of cost and market value of the investment in palladium.
[2] Derived from audited Statement of Financial Condition as of December 31, 2012.