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Significant Accounting Policies (Quantitative Effect Of Adoption Of Investment Company Accounting) (Details) (USD $) In Thousands, unless otherwise specified | 0 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jan. 01, 2014 | Dec. 31, 2014 | Jan. 01, 2014 | Dec. 31, 2013 | Dec. 31, 2012
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Value at December 31, 2013 at lower of cost or market value |  |  |  |  | $ 259,922 gltr_InvestmentInBullion | [1],[2] |
Value at January 1, 2014 |  | 234,158 us-gaap_InvestmentInPhysicalCommodities | [1],[3] |  | 260,476 us-gaap_InvestmentInPhysicalCommodities |  | 185,427 us-gaap_InvestmentInPhysicalCommodities
Gold [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Value at December 31, 2013 at lower of cost or market value |  |  |  |  | 139,729 gltr_InvestmentInBullion / us-gaap_CurrencyAxis = currency_XAU | [1],[2] |
Value at January 1, 2014 | 139,729 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XAU | 133,356 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XAU | [1],[3] | 139,729 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XAU | 139,729 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XAU |  | 96,337 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XAU
Silver [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Value at December 31, 2013 at lower of cost or market value |  |  |  |  | 83,152 gltr_InvestmentInBullion / us-gaap_CurrencyAxis = currency_XAG | [1],[2] |
Value at January 1, 2014 | 83,152 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XAG | 65,115 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XAG | [1],[3] | 83,152 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XAG | 83,152 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XAG |  | 68,562 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XAG
Platinum [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Value at December 31, 2013 at lower of cost or market value |  |  |  |  | 21,057 gltr_InvestmentInBullion / us-gaap_CurrencyAxis = currency_XPT | [1],[2] |
Value at January 1, 2014 | 21,057 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XPT | 17,940 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XPT | [1],[3] | 21,057 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XPT | 21,057 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XPT |  | 12,213 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XPT
Palladium [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Value at December 31, 2013 at lower of cost or market value |  |  |  |  | 15,984 gltr_InvestmentInBullion / us-gaap_CurrencyAxis = currency_XPD | [1],[2] |
Value at January 1, 2014 | 16,538 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XPD | 17,747 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XPD | [1],[3] | 16,538 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XPD | 16,538 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XPD |  | 8,315 us-gaap_InvestmentInPhysicalCommodities / us-gaap_CurrencyAxis = currency_XPD
Gain / (loss) as a result of change in accounting treatment | $ 554 us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome / us-gaap_CurrencyAxis = currency_XPD |  |  |  |  |  |
[1] | At December 31, 2014, the investment in Bullion is valued at fair value. At December 31, 2013 the investment in Bullion was valued 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 Bullion.
[2] | Derived from audited Statement of Financial Condition as of December 31, 2013. The amounts are those previously reported under non-investment company accounting. Refer to Note 2.1 for further information.
[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.

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