Investment Securities, Available-for-Sale (Details) (USD $)	3 Months Ended
Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013 Available-for-sale Securities [Member]	Oct. 31, 2012 Available-for-sale Securities [Member]
Available For Sale Securities Gross Realized Gain Loss Net Abstract
Available-for-sale securities realized gains	$ 4,909,000	$ 84,000
Available-for-sale securities realized losses	0	(21,000)
Available-for-sale securities net realized (losses) gains	4,909,000	63,000
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Net unrealized holding (losses) and gains on investment securities, available-for-sale, included in other comprehensive income	(3,900,000)	1,200,000
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities at cost			18,133,000	22,331,000
Available-for-sale securities unrealized gross gains			4,941,000	8,835,000
Available-for-sale securities unrealized gross losses			(2,000)	(18,000)
Available-for-sale securities at fair value			23,072,000	31,148,000
Available-for-sale securities fair value associated with the unrealized losses			$ 300,000

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

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Before tax and reclassification adjustments amount of unrealized holding gain (loss) and transfers on available-for-sale securities.

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