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Investment Securities: Unrealized Gain (Loss) on Investments (Details) $ in Thousands | Dec. 31, 2024 USD ($) security | Sep. 30, 2024 USD ($) security
--- | --- | ---
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 31,263 | $ 805
Held to maturity, 12 Months or Longer, Estimated Fair Value | 111,304 | 127,905
Held to maturity, Total, Estimated Fair Value | 142,567 | 128,710
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (258) | (6)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (8,411) | (6,567)
Held to maturity, Total, Gross Unrealized Losses | $ (8,669) | $ (6,573)
Held to maturity, Less Than 12 Months, Quantity | security | 20 | 2,000
Held to maturity, 12 Months or Longer, Quantity | security | 78 | 81,000
Available-for-sale Securities, Fair Value: |  |
Available for sale, Less Than 12 Months, Estimated Fair Value | $ 29,584 | $ 13,330
Available for sale, 12 Months or Longer, Estimated Fair Value | 24,959 | 25,751
Available for sale, Total, Estimated Fair Value | 54,543 | 39,081
Available-for-sale Securities, Gross Unrealized Losses: |  |
Available for sale, Less Than 12 Months, Gross Unrealized Losses | (547) | (118)
Available for sale, 12 Months or Longer, Gross Unrealized Losses | (510) | (407)
Available for sale, Total, Gross Unrealized Losses | $ (1,057) | $ (525)
Available-for-sale, Less than 12 Months, Quantity | security | 12 | 5,000
Available-for-sale, 12 Months or Longer, Quantity | security | 22 | 23,000
U.S. Treasury and U.S. government agency securities |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 9,786 | $ 0
Held to maturity, 12 Months or Longer, Estimated Fair Value | 64,689 | 78,363
Held to maturity, Total, Estimated Fair Value | 74,475 | 78,363
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (9) | 0
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (4,907) | (4,197)
Held to maturity, Total, Gross Unrealized Losses | $ (4,916) | $ (4,197)
Held to maturity, Less Than 12 Months, Quantity | security | 1 | 0
Held to maturity, 12 Months or Longer, Quantity | security | 15 | 17,000
Available-for-sale Securities, Fair Value: |  |
Available for sale, Less Than 12 Months, Estimated Fair Value | $ 7,557 |
Available for sale, Total, Estimated Fair Value | 7,557 |
Available-for-sale Securities, Gross Unrealized Losses: |  |
Available for sale, Less Than 12 Months, Gross Unrealized Losses | (25) |
Available for sale, 12 Months or Longer, Gross Unrealized Losses | 0 |
Available for sale, Total, Gross Unrealized Losses | $ (25) |
Available-for-sale, Less than 12 Months, Quantity | security | 5 |
U.S. government agencies |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 18,746 | $ 1
Held to maturity, 12 Months or Longer, Estimated Fair Value | 26,938 | 28,618
Held to maturity, Total, Estimated Fair Value | 45,684 | 28,619
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (237) | 0
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (2,087) | (1,378)
Held to maturity, Total, Gross Unrealized Losses | $ (2,324) | $ (1,378)
Held to maturity, Less Than 12 Months, Quantity | security | 15 | 1,000
Held to maturity, 12 Months or Longer, Quantity | security | 43 | 44,000
Available-for-sale Securities, Fair Value: |  |
Available for sale, Less Than 12 Months, Estimated Fair Value | $ 22,027 | $ 11,368
Available for sale, 12 Months or Longer, Estimated Fair Value | 24,959 | 25,751
Available for sale, Total, Estimated Fair Value | 46,986 | 37,119
Available-for-sale Securities, Gross Unrealized Losses: |  |
Available for sale, Less Than 12 Months, Gross Unrealized Losses | (522) | (117)
Available for sale, 12 Months or Longer, Gross Unrealized Losses | (510) | (407)
Available for sale, Total, Gross Unrealized Losses | $ (1,032) | $ (524)
Available-for-sale, Less than 12 Months, Quantity | security | 7 | 4,000
Available-for-sale, 12 Months or Longer, Quantity | security | 22 | 23,000
Private label residential |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 2,731 | $ 804
Held to maturity, 12 Months or Longer, Estimated Fair Value | 19,187 | 20,447
Held to maturity, Total, Estimated Fair Value | 21,918 | 21,251
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (12) | (6)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (1,410) | (974)
Held to maturity, Total, Gross Unrealized Losses | $ (1,422) | $ (980)
Held to maturity, Less Than 12 Months, Quantity | security | 4 | 1,000
Held to maturity, 12 Months or Longer, Quantity | security | 19 | 19,000
Bank issued trust preferred securities |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 0 | $ 0
Held to maturity, 12 Months or Longer, Estimated Fair Value | 490 | 477
Held to maturity, Total, Estimated Fair Value | 490 | 477
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | 0 | 0
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (7) | (18)
Held to maturity, Total, Gross Unrealized Losses | $ (7) | $ (18)
Held to maturity, Less Than 12 Months, Quantity | security | 0 | 0
Held to maturity, 12 Months or Longer, Quantity | security | 1 | 1,000
US Government Agencies Debt Securities |  |
Available-for-sale Securities, Fair Value: |  |
Available for sale, Less Than 12 Months, Estimated Fair Value |  | $ 1,962
Available for sale, 12 Months or Longer, Estimated Fair Value | $ 0 | 0
Available for sale, Total, Estimated Fair Value |  | 1,962
Available-for-sale Securities, Gross Unrealized Losses: |  |
Available for sale, Less Than 12 Months, Gross Unrealized Losses |  | (1)
Available for sale, 12 Months or Longer, Gross Unrealized Losses |  | 0
Available for sale, Total, Gross Unrealized Losses |  | $ (1)
Available-for-sale, Less than 12 Months, Quantity | security |  | 1,000
Available-for-sale, 12 Months or Longer, Quantity | security | 0 | 0

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