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MBS And Other Investments: Narrative-Realized Gains (Losses) (Details)
 3 Months Ended 9 Months Ended
Jun. 30, 2015
USD ($)
security
Jun. 30, 2014
USD ($)
security
Jun. 30, 2015
USD ($)
security
Jun. 30, 2014
USD ($)
security
Sep. 30, 2014
USD ($)
Investments [Abstract]          
Marketable Securities, Realized Gain     $ 0 $ 0  
Marketable Securities, Gain (Loss) $ 0 $ 0 45,000 32,000  
Loss on sale of securities $ 20,000 $ 40,000 $ 58,000 $ 445,000  
Held-to-maturity securities, realized loss, number of securities | security 12 12 14 15  
Available-for-sale securities, realized loss, number of securities | security       6  
Security owned and pledged as collateral $ 7,310,000   $ 7,310,000   $ 6,220,000