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Significant Accounting Policies (Schedule Of Investment In Gold) (Details)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
USD ($)
oz
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
oz
Sep. 30, 2015
USD ($)
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     131,546.9   24,462.3
Redemptions (in Ounces) | oz     (24,386.5)   (68,452.9)
Transfers of gold to pay expenses (in Ounces) | oz     (2,281.3)   (2,991.9)
Closing balance (in Ounces) | oz 841,728.9   841,728.9   736,849.8
Investment in gold, fair value, opening balance     $ 782,719 $ 940,011 $ 940,011
Creations     165,211   30,185
Redemptions     (26,634)   (78,939)
Realized loss on gold distributed for the redemption of Shares $ 0 $ (1,233) (2,710) (1,862) (3,410)
Transfers of gold to pay expenses     (2,814)   (3,505)
Realized loss on gold transferred to pay expenses 89 (44) 63 (37) (94)
Change in unrealized gain / (loss) on investment in gold 771 $ (42,100) 197,351 $ (64,518) (101,529)
Investment in gold, fair value, closing balance $ 1,113,186   $ 1,113,186   $ 782,719