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MBS And Other Investments: Narrative-Realized Gains (Losses) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Sep. 30, 2013
security
Sep. 30, 2014
security
Sep. 30, 2013
security
Sep. 30, 2012
security
Schedule of Available-for-sale Securities [Line Items]        
Loss on sale of securities $ 465 $ 671 $ 873  
Held-to-maturity securities, realized loss, number of securities 15 18 25  
Available-for-sale securities, realized loss, number of securities 6 5   1
Available-for-sale Securities, Gross Realized Gains     0  
Available-for-sale Securities, Gross Realized Losses   32   22
Security owned and pledged as collateral $ 4,537 $ 6,221 $ 4,537