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Significant Accounting Policies (Schedule Of Unrealized Gains Or Losses On The Trust's Bullion Holdings) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Jan. 02, 2014
Dec. 31, 2013
Dec. 31, 2012
Bullion [Line Items]        
Investment in gold - cost $ 1,027,189   $ 1,040,003 [1]  
Unrealized gain on investment in gold 77,157   0  
Investment in gold - fair value 1,104,346 [2],[3] 1,040,003 1,040,003 [1],[2] 1,561,925
Gold [Member]
        
Bullion [Line Items]        
Investment in gold - cost $ 1,027,189   $ 1,040,003  
[1] Derived from audited Statement of Financial Condition as of December 31, 2013.
[2] At March 31, 2014, the investment in gold is recorded at fair value. At December 31, 2013, the investment in gold was recorded 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 gold.
[3] 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.