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Investment Securities, Available-for-Sale (Details) (USD $)
3 Months Ended 6 Months Ended
Apr. 30, 2014
Apr. 30, 2013
Apr. 30, 2014
Apr. 30, 2013
Apr. 30, 2014
Available-for-sale Securities [Member]
Oct. 31, 2013
Available-for-sale Securities [Member]
Available For Sale Securities Gross Realized Gain (Loss) Net Abstract            
Available-for-sale securities realized gains $ 129,000 $ 342,000 $ 562,000 $ 5,251,000    
Available-for-sale securities realized losses (528,000) 0 (898,000) 0    
Available-for-sale securities net realized gains (losses) (399,000) 342,000 (336,000) 5,251,000    
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]            
Net unrealized holding gains and (losses) on investment securities, available-for-sale, included in other comprehensive income 1,500,000 1,000,000 700,000 (2,900,000)    
Schedule Of Available For Sale Securities [Line Items]            
Available-for-sale securities at cost         10,737,000 15,459,000
Available-for-sale securities unrealized gross gains         7,958,000 7,306,000
Available-for-sale securities unrealized gross losses         (33,000) (38,000)
Available-for-sale securities at fair value         18,662,000 22,727,000
Available-for-sale securities fair value associated with the unrealized losses         $ 1,600,000