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Investment Securities: Unrealized Gain (Loss) on Investments (Details) $ in Thousands | Dec. 31, 2021 USD ($) security | Sep. 30, 2021 USD ($) security
--- | --- | ---
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 65,425 | $ 36,598
Held to maturity, 12 Months or Longer, Estimated Fair Value | 15 | 16
Held to maturity, Total, Estimated Fair Value | 65,440 | 36,614
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (571) | (244)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | 0 | 0
Held to maturity, Total, Gross Unrealized Losses | $ (571) | $ (244)
Held to maturity, Less Than 12 Months, Quantity | security | 24 | 14
Held to maturity, 12 Months or Longer, Quantity | security | 4 | 4
Available-for-sale Securities, Fair Value: |  |
Available for sale, Less Than 12 Months, Estimated Fair Value | $ 9,941 | $ 20,146
Available for sale, 12 Months or Longer, Estimated Fair Value | 13,439 | 5,491
Available for sale, Total, Estimated Fair Value | 23,380 | 25,637
Available-for-sale Securities, Gross Unrealized Losses: |  |
Available for sale, Less Than 12 Months, Gross Unrealized Losses | (66) | (103)
Available for sale, 12 Months or Longer, Gross Unrealized Losses | (43) | (11)
Available for sale, Total, Gross Unrealized Losses | $ (109) | $ (114)
Available-for-sale, Less than 12 Months, Quantity | security | 10 | 13
Available-for-sale, 12 Months or Longer, Quantity | security | 7 | 3
Mortgage-backed Securities, U.S. government agencies |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 40,171 | $ 18,795
Held to maturity, 12 Months or Longer, Estimated Fair Value | 0 | 0
Held to maturity, Total, Estimated Fair Value | 40,171 | 18,795
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (285) | (99)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | 0 | 0
Held to maturity, Total, Gross Unrealized Losses | $ (285) | $ (99)
Held to maturity, Less Than 12 Months, Quantity | security | 10 | 5
Held to maturity, 12 Months or Longer, Quantity | security | 0 | 0
Available-for-sale Securities, Fair Value: |  |
Available for sale, Less Than 12 Months, Estimated Fair Value | $ 9,941 | $ 20,146
Available for sale, 12 Months or Longer, Estimated Fair Value | 13,439 | 5,491
Available for sale, Total, Estimated Fair Value | 23,380 | 25,637
Available-for-sale Securities, Gross Unrealized Losses: |  |
Available for sale, Less Than 12 Months, Gross Unrealized Losses | (66) | (103)
Available for sale, 12 Months or Longer, Gross Unrealized Losses | (43) | (11)
Available for sale, Total, Gross Unrealized Losses | $ (109) | $ (114)
Available-for-sale, Less than 12 Months, Quantity | security | 10 | 13
Available-for-sale, 12 Months or Longer, Quantity | security | 7 | 3
Mortgage-backed Securities, Private label residential |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 8,213 | $ 8,091
Held to maturity, 12 Months or Longer, Estimated Fair Value | 14 | 15
Held to maturity, Total, Estimated Fair Value | 8,227 | 8,106
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (192) | (122)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | 0 | 0
Held to maturity, Total, Gross Unrealized Losses | $ (192) | $ (122)
Held to maturity, Less Than 12 Months, Quantity | security | 5 | 5
Held to maturity, 12 Months or Longer, Quantity | security | 3 | 3
Private label residential |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 17,041 |
Held to maturity, 12 Months or Longer, Estimated Fair Value | 1 |
Held to maturity, Total, Estimated Fair Value | 17,042 |
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (94) |
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | 0 |
Held to maturity, Total, Gross Unrealized Losses | $ (94) |
Held to maturity, Less Than 12 Months, Quantity | security | 9 |
Held to maturity, 12 Months or Longer, Quantity | security | 1 |
Bank issued trust preferred securities |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value |  | $ 9,712
Held to maturity, 12 Months or Longer, Estimated Fair Value |  | 1
Held to maturity, Total, Estimated Fair Value |  | 9,713
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses |  | (23)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses |  | 0
Held to maturity, Total, Gross Unrealized Losses |  | $ (23)
Held to maturity, Less Than 12 Months, Quantity | security |  | 4
Held to maturity, 12 Months or Longer, Quantity | security |  | 1

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