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MBS And Other Investments: Schedule of Contractual maturities of debt securities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Sep. 30, 2014
Held-to-maturity Securities, Amortized Cost:    
Due within one year $ 0us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount  
Due after one year to five years 3,019us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount  
Due after five to ten years 25us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount  
Due after ten years 2,062us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount  
Total 5,106us-gaap_HeldToMaturitySecurities 5,298us-gaap_HeldToMaturitySecurities
Held-to-maturity Securities, Estimated Fair Value:    
Due within one year 0us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue  
Due after one year to five years 3,055us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue  
Due after five to ten years 25us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue  
Due after ten years 3,055us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue  
Estimated Fair Value 6,135us-gaap_HeldToMaturitySecuritiesFairValue 6,274us-gaap_HeldToMaturitySecuritiesFairValue
Available-for-sale Securities, Amortized Cost:    
Due within one year 0us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost  
Due after one year to five years 15us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost  
Due after five to ten years 0us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost  
Due after ten years 453us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost  
Total 468us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis  
Available-for-sale Securities, Estimated Fair Value:    
Due within one year 0us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue  
Due after one year to five years 15us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue  
Due after five to ten years 0us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue  
Due after ten years 496us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue  
Total $ 511us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue