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MBS And Other Investments: Narrative-Realized Gains (Losses) (Details) (USD $)
3 Months Ended 6 Months Ended
Mar. 31, 2014
security
Mar. 31, 2013
security
Mar. 31, 2014
security
Mar. 31, 2013
security
Sep. 30, 2013
Investments [Abstract]          
Marketable Securities, Gain (Loss) $ 32,000        
Gain on sale of securities   0 0 20,000  
Loss on sale of securities 365,000 152,000 405,000 384,000  
Held-to-maturity securities, realized loss, number of securities 12 15 15 17  
Available-for-sale securities, realized loss, number of securities 5   6 6  
Security owned and pledged as collateral $ 6,490,000   $ 6,490,000   $ 4,540,000