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Investment Securities, Available-for-Sale (Details) (USD $)
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12 Months Ended |
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Oct. 31, 2012
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Oct. 31, 2011
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Oct. 31, 2010
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| Available For Sale Securities Gross Realized Gain Loss Net Abstract |
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| Available-for-sale securities realized gains |
$ 348,000 |
$ 3,212,000 |
$ 3,108,000 |
| Available-for-sale securities realized losses |
(440,000) |
(2,626,000) |
(60,000) |
| Available-for-sale securities net realized (losses) gains |
(92,000) |
586,000 |
3,048,000 |
| Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract] |
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|
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| Net unrealized holding (losses) and gains on investment securities, available-for-sale, included in other comprehensive income |
3,300,000 |
2,200,000 |
1,300,000 |
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Available-for-sale Securities [Member]
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| Schedule Of Available For Sale Securities [Line Items] |
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| Available-for-sale securities at cost |
22,331,000 |
34,368,000 |
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| Available-for-sale securities unrealized gross gains |
8,835,000 |
5,518,000 |
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| Available-for-sale securities unrealized gross losses |
(18,000) |
(45,000) |
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| Available-for-sale securities at fair value |
31,148,000 |
39,841,000 |
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| Available-for-sale securities fair value associated with the unrealized losses |
$ 500,000 |
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