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Significant Accounting Policies (Schedule Of Investment In Gold) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
USD ($)
oz
Dec. 31, 2017
USD ($)
oz
Dec. 31, 2016
USD ($)
oz
Significant Accounting Policies [Abstract]      
Opening balance (in Ounces) | oz 808,581.0 806,891.3  
Creations (in Ounces) | oz 101,505.5 53,345.1  
Redemptions (in Ounces) | oz (265,666.8) (48,472.0)  
Transfers of gold to pay expenses (in Ounces) | oz (2,970.6) (3,183.4)  
Closing balance (in Ounces) | oz 641,449.1 808,581.0 806,891.3
Investment in gold, fair value, opening balance $ 1,048,326 $ 935,268  
Creations 132,781 67,119  
Redemptions (336,610) (60,954)  
Realized gain on gold distributed for the redemption of Shares 10,687 2,048 $ (5,827)
Transfers of gold to pay expenses (3,796) (3,966)  
Realized gain on gold transferred to pay expenses 159 99 113
Change in unrealized (loss) / gain on investment in gold (29,434) 108,712 59,660
Investment in gold, fair value, closing balance $ 822,113 $ 1,048,326 $ 935,268