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Significant Accounting Policies (Schedule Of Investment In Gold) (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2016
USD ($)
oz
Mar. 31, 2015
USD ($)
oz
Dec. 31, 2015
USD ($)
oz
Significant Accounting Policies [Abstract]      
Opening balance (in Ounces) | oz 736,849.8 783,832.3 783,832.3
Creations (in Ounces) | oz 68,254.1   24,462.3
Redemptions (in Ounces) | oz (24,386.5)   (68,452.9)
Transfers of gold to pay expenses (in Ounces) | oz (710.3)   (2,991.9)
Closing balance (in Ounces) | oz 780,007.1   736,849.8
Investment in gold, fair value, opening balance $ 782,719 $ 940,011 $ 940,011
Creations 82,925   30,185
Redemptions (26,634)   (78,939)
Realized loss on gold distributed for the redemption of Shares (2,710) (330) (3,410)
Transfers of gold to pay expenses (795)   (3,505)
Realized (loss) / gain on gold transferred to pay expenses (60) 16 (94)
Change in unrealized loss on investment in gold 129,424 $ (10,394) (101,529)
Investment in gold, fair value, closing balance $ 964,869   $ 782,719