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Significant Accounting Policies (Schedule Of Unrealized Gains Or Losses On The Trust's Palladium Holdings) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Jan. 01, 2014
Dec. 31, 2013
Dec. 31, 2012
Significant Accounting Policies [Abstract]          
Investment in palladium at cost $ 218,668 $ 335,517      
Investment in palladium - fair value $ 184,779   $ 510,475 $ 410,663 $ 510,475