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Significant Accounting Policies (Schedule Of Investment In Gold) (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2017
USD ($)
oz
Mar. 31, 2016
USD ($)
oz
Dec. 31, 2016
USD ($)
oz
Significant Accounting Policies [Abstract]      
Opening balance (in Ounces) | oz 806,891.3 736,849.8 736,849.8
Creations (in Ounces) | oz 14,571.3   160,724.9
Redemptions (in Ounces) | oz (4,854.6)   (87,572.4)
Transfers of gold to pay expenses (in Ounces) | oz (784.6)   (3,111.0)
Closing balance (in Ounces) | oz 815,823.4   806,891.3
Investment in gold, fair value, opening balance $ 935,268 $ 782,719 $ 782,719
Creations 17,764   202,685
Redemptions (6,103)   (100,214)
Realized gain / (loss) on gold distributed for the redemption of Shares 210 (2,710) (5,827)
Transfers of gold to pay expenses (936)   (3,868)
Realized (loss) / gain on gold transferred to pay expenses (16) (60) 113
Change in unrealized gain on investment in gold 69,391 $ 129,424 59,660
Investment in gold, fair value, closing balance $ 1,015,578   $ 935,268