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Investment Securities: Unrealized Gain (Loss) on Investments (Details) $ in Thousands | Sep. 30, 2019 USD ($) security | Sep. 30, 2018 USD ($) security
--- | --- | ---
Held-to-maturity Securities, Fair Value: |  |
Estimated Fair Value - Less Than 12 Months | $ 291 | $ 8,900
Estimated Fair Value - 12 Months or Longer | 3,090 | 3,049
Total Estimated Fair Value | 3,381 | 11,949
Held-to-maturity Securities, Gross Unrealized Losses |  |
Gross Unrealized Losses - Less Than 12 Months | (1) | (42)
Gross Unrealized Losses - 12 Months or Longer | (10) | (64)
Total Gross Unrealized Losses | $ (11) | $ (106)
Held-to-maturity, Qty, Less Than 12 Months | security | 2 | 4
Held-to-maturity, Qty, 12 Months or Longer | security | 12 | 14
Estimated Fair Value - Less Than 12 Months |  | $ 34
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | (1)
Estimated Fair Value - 12 Months or Longer |  | 917
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | (83)
Total Estimated Fair Value |  | 951
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | $ (84)
Available-for-sale Securities, Gross Unrealized Losses: |  |
Available-for-sale, Qty, Less than 12 Months | security |  | 1
Available-for-sale, Qty, 12 Months or Longer | security |  | 1
Mortgage-backed Securities, U.S. government agencies |  |
Held-to-maturity Securities, Fair Value: |  |
Estimated Fair Value - Less Than 12 Months | $ 291 | $ 954
Estimated Fair Value - 12 Months or Longer | 76 | 64
Total Estimated Fair Value | 367 | 1,018
Held-to-maturity Securities, Gross Unrealized Losses |  |
Gross Unrealized Losses - Less Than 12 Months | (1) | (20)
Gross Unrealized Losses - 12 Months or Longer | (1) | (1)
Total Gross Unrealized Losses | $ (2) | $ (21)
Held-to-maturity, Qty, Less Than 12 Months | security | 2 | 2
Held-to-maturity, Qty, 12 Months or Longer | security | 6 | 5
Estimated Fair Value - Less Than 12 Months |  | $ 34
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | (1)
Estimated Fair Value - 12 Months or Longer |  | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 0
Total Estimated Fair Value |  | 34
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | $ (1)
Available-for-sale Securities, Gross Unrealized Losses: |  |
Available-for-sale, Qty, Less than 12 Months | security |  | 1
Available-for-sale, Qty, 12 Months or Longer | security |  | 0
Mortgage-backed Securities, Private label residential |  |
Held-to-maturity Securities, Fair Value: |  |
Estimated Fair Value - Less Than 12 Months | $ 0 | $ 0
Estimated Fair Value - 12 Months or Longer | 23 | 50
Total Estimated Fair Value | 23 | 50
Held-to-maturity Securities, Gross Unrealized Losses |  |
Gross Unrealized Losses - Less Than 12 Months | 0 | 0
Gross Unrealized Losses - 12 Months or Longer | (1) | (2)
Total Gross Unrealized Losses | $ (1) | $ (2)
Held-to-maturity, Qty, Less Than 12 Months | security | 0 | 0
Held-to-maturity, Qty, 12 Months or Longer | security | 5 | 8
US Government Agencies Debt Securities |  |
Held-to-maturity Securities, Fair Value: |  |
Estimated Fair Value - Less Than 12 Months | $ 0 | $ 7,946
Estimated Fair Value - 12 Months or Longer | 2,991 | 2,935
Total Estimated Fair Value | 2,991 | 10,881
Held-to-maturity Securities, Gross Unrealized Losses |  |
Gross Unrealized Losses - Less Than 12 Months | 0 | (22)
Gross Unrealized Losses - 12 Months or Longer | (8) | (61)
Total Gross Unrealized Losses | $ (8) | $ (83)
Held-to-maturity, Qty, Less Than 12 Months | security | 0 | 2
Held-to-maturity, Qty, 12 Months or Longer | security | 1 | 1
Mutual funds |  |
Held-to-maturity Securities, Gross Unrealized Losses |  |
Estimated Fair Value - Less Than 12 Months |  | $ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 0
Estimated Fair Value - 12 Months or Longer |  | 917
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | (83)
Total Estimated Fair Value |  | 917
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | $ (83)
Available-for-sale Securities, Gross Unrealized Losses: |  |
Available-for-sale, Qty, Less than 12 Months | security |  | 0
Available-for-sale, Qty, 12 Months or Longer | security |  | 1

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