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Investments AFS (Details) (USD $)
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12 Months Ended | ||
|---|---|---|---|
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Oct. 31, 2011
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Oct. 31, 2010
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Oct. 31, 2009
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| Available For Sale Securities Gross Realized Gain Loss Net Abstract | |||
| Available-for-sale securities realized gains | $ 3,212,000 | $ 3,108,000 | $ 1,959,000 |
| Available-for-sale securities realized losses | (2,626,000) | (60,000) | (397,000) |
| Available-for-sale securities net realized gains (losses) | 586,000 | 3,048,000 | 1,562,000 |
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Available-for-sale Securities [Member]
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| Schedule Of Available For Sale Securities [Line Items] | |||
| Available-for-sale securities at cost | 34,368,000 | 34,300,000 | |
| Available-for-sale securities unrealized gross gains | 5,518,000 | 3,655,000 | |
| Available-for-sale securities unrealized gross losses | (45,000) | (414,000) | |
| Available-for-sale securities at fair value | 39,841,000 | 37,541,000 | |
| Available-for-sale securities fair value associated with the unrealized losses | $ 700,000 | ||