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Significant Accounting Policies (Categorization Of The Trust's Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in palladium	$ 303,865	$ 300,638

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+ References

No definition available.

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- Definition

Fair value of investment held in physical commodities, for example, but not limited to, gold, silver, platinum, crude oil, coal, sugar, rice, wheat.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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