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Significant Accounting Policies (Schedule Of Unrealized Gains Or Losses On The Trust's Platinum Holdings) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Jan. 01, 2014	Dec. 31, 2013
Significant Accounting Policies [Abstract]
Investment in platinum at cost	$ 614,675	$ 699,924
Investment in platinum - fair value	$ 403,969	$ 622,683	$ 729,594	$ 729,594

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- References

No definition available.

+ Details

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- Definition

Investments held in physical commodities, such as gold, silver, platinum, crude oil, coal, sugar, rice, wheat.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 12
-Article 5

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- Definition

Cost of the investment.

+ References

No definition available.

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