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Note 2 - Significant Accounting Policies (Details) - Adjustment to Reclassify the Balance of Redeemable Capital Shares - USD ($)
$ in Thousands

Dec. 31, 2015

^[1]

Dec. 31, 2014

^[1]

Dec. 31, 2013

Dec. 31, 2012

Note 2 - Significant Accounting Policies (Details) - Adjustment to Reclassify the Balance of Redeemable Capital Shares [Line Items]

Redeemable capital Shares

$ 6,240,747

$ 9,706,654

Redeemable capital Shares

(6,240,747)

Shareholders’ equity

$ 4,391,944

$ 5,260,802

$ (1,575,959)

^[2]

Shareholders’ equity

6,240,747

Scenario, Previously Reported [Member]

Note 2 - Significant Accounting Policies (Details) - Adjustment to Reclassify the Balance of Redeemable Capital Shares [Line Items]

Redeemable capital Shares

6,240,747

Scenario After Application of ASU 2013-08 [Member]

Note 2 - Significant Accounting Policies (Details) - Adjustment to Reclassify the Balance of Redeemable Capital Shares [Line Items]

Shareholders’ equity

$ 4,391,944

$ 5,260,802

^[2]

$ 6,240,747

^[2]

[1]	Represents net asset value. Please refer to Note 2D.
[2]	The Trust reclassified redeemable capital shares as of December 31, 2013 into shareholders' equity as part of it's transition to investment companyaccounting effective January 1, 2014. Please refer to Note 2B.

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The reclassification of redeemable capital shares to shareholders' equity as a result of adoption of ASU 2013-08.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-31)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

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Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

+ References

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.27(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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