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Derivative Contract Information - Fund's OTC Derivative Assets and Liabilities (Detail) - Over-the-Counter ("OTC") [Member] - Swap Contracts [Member] $ in Thousands	Jun. 30, 2017 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amounts of Assets and Liabilities Presented in the Statement of Financial Condition, Assets	$ 0
Gross Amounts of Assets and Liabilities Presented in the Statement of Financial Condition, Liabilities	0
SPDR Long Dollar Gold Trust [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amounts of Assets and Liabilities Presented in the Statement of Financial Condition, Assets	0
Gross Amounts of Assets and Liabilities Presented in the Statement of Financial Condition, Liabilities	$ 0

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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