Investments Trading Securities (Details) (USD $)	3 Months Ended	6 Months Ended
Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011	Oct. 31, 2011
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities at cost	$ 211,671,000		$ 211,671,000		$ 189,082,000
Trading securities at fair value	224,337,000		224,337,000		193,209,000
Trading securities net unrealized gain	1,000,000	9,300,000	6,800,000	9,500,000
Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities at cost	137,100,000		137,100,000		105,230,000
Trading securities at fair value	147,602,000		147,602,000		107,987,000
Debt Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities at cost	74,571,000		74,571,000		83,852,000
Trading securities at fair value	$ 76,735,000		$ 76,735,000		$ 85,222,000

The total of financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Trading Securities

-URI http://asc.fasb.org/extlink&oid=6526789

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

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-Subparagraph a

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Name Implementation Guide (Q and A)

-Number FAS115

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+ Details

- Definition

The increase (decrease) resulting in a gain from the difference between the fair value and the carrying value, or in the comparative fair values, of trading securities held at each balance sheet date, that was included in earnings for the period.

+ References

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

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+ Details