|
Investments Trading Securities (Details) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Oct. 31, 2011
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Oct. 31, 2010
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Oct. 31, 2009
|
|
| Schedule Of Trading Securities And Other Trading Assets [Line Items] | |||
| Trading securities at cost | $ 189,082,000 | $ 230,973,000 | |
| Trading securities at fair value | 193,209,000 | 236,859,000 | |
| Trading securities net unrealized gain (loss) | 6,800,000 | 1,600,000 | 8,300,000 |
|
Equity Securities [Member]
|
|||
| Schedule Of Trading Securities And Other Trading Assets [Line Items] | |||
| Trading securities at cost | 105,230,000 | 111,814,000 | |
| Trading securities at fair value | 107,987,000 | 116,876,000 | |
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Debt Securities [Member]
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| Schedule Of Trading Securities And Other Trading Assets [Line Items] | |||
| Trading securities at cost | 83,852,000 | 119,159,000 | |
| Trading securities at fair value | $ 85,222,000 | $ 119,983,000 | |