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MBS And Other Investments: Unrealized Gain (Loss) on Investments (Details)
$ in Thousands
 12 Months Ended
Sep. 30, 2015
USD ($)
security
Sep. 30, 2014
USD ($)
security
Held-to-maturity Securities, Fair Value:    
Less Than 12 Months $ (50) $ (2,998)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 220 264
Total 270 3,262
Held-to-maturity Securities, Gross Unrealized Losses    
Less Than 12 Months 0 (13)
12 Months or Longer (13) (9)
Total $ (13) $ (22)
Held-to-maturity, Qty, Less Than 12 Months | security 5 2
Held-to-maturity, Qty, 12 Months or Longer | security 16 19
Available-for-sale Securities, Fair Value:    
Less Than 12 Months $ 1 $ 19
Available-for-sale Securities, 12 Months or Longer, Estimated Fair Value 1,019 998
Total 1,020 1,017
Available-for-sale Securities, Gross Unrealized Losses:    
Less Than 12 Months 0 0
12 Months or Longer (29) (44)
Total $ (29) $ (44)
Available-for-sale, Qty, Less than 12 Months | security 1 1
Available-for-sale, Qty, 12 Months or Longer | security 3 2
Mortgage-backed Securities, U.S. government agencies    
Held-to-maturity Securities, Fair Value:    
Less Than 12 Months $ (49) $ 0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 63 76
Total 112 76
Held-to-maturity Securities, Gross Unrealized Losses    
Less Than 12 Months 0 0
12 Months or Longer (1) (2)
Total $ (1) $ (2)
Held-to-maturity, Qty, Less Than 12 Months | security 4 0
Held-to-maturity, Qty, 12 Months or Longer | security 5 8
Available-for-sale Securities, Fair Value:    
Less Than 12 Months $ 1 $ 19
Available-for-sale Securities, 12 Months or Longer, Estimated Fair Value 48 40
Total 49 59
Available-for-sale Securities, Gross Unrealized Losses:    
Less Than 12 Months 0 0
12 Months or Longer 0 (2)
Total $ 0 $ (2)
Available-for-sale, Qty, Less than 12 Months | security 1 1
Available-for-sale, Qty, 12 Months or Longer | security 2 1
Mortgage-backed Securities, Private label residential    
Held-to-maturity Securities, Fair Value:    
Less Than 12 Months $ (1) $ (9)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 157 188
Total 158 197
Held-to-maturity Securities, Gross Unrealized Losses    
Less Than 12 Months 0 0
12 Months or Longer (12) (7)
Total $ (12) $ (7)
Held-to-maturity, Qty, Less Than 12 Months | security 1 1
Held-to-maturity, Qty, 12 Months or Longer | security 11 11
US Government Agencies Debt Securities [Member]    
Held-to-maturity Securities, Fair Value:    
Less Than 12 Months   $ (2,989)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value   0
Total   2,989
Held-to-maturity Securities, Gross Unrealized Losses    
Less Than 12 Months   (13)
12 Months or Longer   0
Total   $ (13)
Held-to-maturity, Qty, Less Than 12 Months | security   1
Held-to-maturity, Qty, 12 Months or Longer | security   0
Mutual funds    
Available-for-sale Securities, Fair Value:    
Less Than 12 Months $ 0 $ 0
Available-for-sale Securities, 12 Months or Longer, Estimated Fair Value 971 958
Total 971 958
Available-for-sale Securities, Gross Unrealized Losses:    
Less Than 12 Months 0 0
12 Months or Longer (29) (42)
Total $ (29) $ (42)
Available-for-sale, Qty, Less than 12 Months | security 0 0
Available-for-sale, Qty, 12 Months or Longer | security 1 1