v3.26.1
Investment Securities: Unrealized Gain (Loss) on Investments (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
security
Sep. 30, 2025
USD ($)
security
Held-to-maturity Securities, Fair Value:    
Held to maturity, Less Than 12 Months, Estimated Fair Value $ 15,929 $ 843
Held to maturity, 12 Months or Longer, Estimated Fair Value 89,100 99,382
Held to maturity, Total, Estimated Fair Value 105,029 100,225
Held-to-maturity Securities, Gross Unrealized Losses    
Held to maturity, Less Than 12 Months, Gross Unrealized Losses (117) (6)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses (4,440) (4,937)
Held to maturity, Total, Gross Unrealized Losses $ (4,557) $ (4,943)
Held to maturity, Less Than 12 Months, Quantity | security 12 5,000
Held to maturity, 12 Months or Longer, Quantity | security 62 70,000
Available-for-sale Securities, Fair Value:    
Available for sale, Less Than 12 Months, Estimated Fair Value $ 33,993 $ 15,899
Available for sale, 12 Months or Longer, Estimated Fair Value 24,943 28,947
Available for sale, Total, Estimated Fair Value 58,936 44,846
Available-for-sale Securities, Gross Unrealized Losses:    
Available for sale, Less Than 12 Months, Gross Unrealized Losses (866) (67)
Available for sale, 12 Months or Longer, Gross Unrealized Losses (717) (692)
Available for sale, Total, Gross Unrealized Losses $ (1,583) $ (759)
Available-for-sale, Less than 12 Months, Quantity | security 12 4,000
Available-for-sale, 12 Months or Longer, Quantity | security 22 24,000
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 $ 0 $ 0
Held to maturity, 12 Months or Longer, Estimated Fair Value 54,676 56,960
Held to maturity, Total, Estimated Fair Value 54,676 56,960
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 (2,168) (2,760)
Held to maturity, Total, Gross Unrealized Losses $ (2,168) $ (2,760)
Held to maturity, Less Than 12 Months, Quantity | security 0 0
Held to maturity, 12 Months or Longer, Quantity | security 13 14,000
Available-for-sale Securities, Fair Value:    
Available for sale, Less Than 12 Months, Estimated Fair Value   $ 3,977
Available for sale, 12 Months or Longer, Estimated Fair Value   0
Available for sale, Total, Estimated Fair Value   3,977
Available-for-sale Securities, Gross Unrealized Losses:    
Available for sale, Less Than 12 Months, Gross Unrealized Losses   0
Available for sale, 12 Months or Longer, Gross Unrealized Losses   0
Available for sale, Total, Gross Unrealized Losses   $ 0
Available-for-sale, Less than 12 Months, Quantity | security   1,000
Available-for-sale, 12 Months or Longer, Quantity | security   0
U.S. government agencies    
Held-to-maturity Securities, Fair Value:    
Held to maturity, Less Than 12 Months, Estimated Fair Value $ 14,217 $ 7
Held to maturity, 12 Months or Longer, Estimated Fair Value 23,269 27,776
Held to maturity, Total, Estimated Fair Value 37,486 27,783
Held-to-maturity Securities, Gross Unrealized Losses    
Held to maturity, Less Than 12 Months, Gross Unrealized Losses (78) 0
Held to maturity, 12 Months or Longer, Gross Unrealized Losses (1,475) (1,357)
Held to maturity, Total, Gross Unrealized Losses $ (1,553) $ (1,357)
Held to maturity, Less Than 12 Months, Quantity | security 9 1,000
Held to maturity, 12 Months or Longer, Quantity | security 36 42,000
Available-for-sale Securities, Fair Value:    
Available for sale, Less Than 12 Months, Estimated Fair Value $ 33,993 $ 11,922
Available for sale, 12 Months or Longer, Estimated Fair Value 24,943 28,947
Available for sale, Total, Estimated Fair Value 58,936 40,869
Available-for-sale Securities, Gross Unrealized Losses:    
Available for sale, Less Than 12 Months, Gross Unrealized Losses (866) (67)
Available for sale, 12 Months or Longer, Gross Unrealized Losses (717) (692)
Available for sale, Total, Gross Unrealized Losses $ (1,583) $ (759)
Available-for-sale, Less than 12 Months, Quantity | security 12 3,000
Available-for-sale, 12 Months or Longer, Quantity | security 22 24,000
Private label residential    
Held-to-maturity Securities, Fair Value:    
Held to maturity, Less Than 12 Months, Estimated Fair Value $ 1,712 $ 341
Held to maturity, 12 Months or Longer, Estimated Fair Value 11,155 14,646
Held to maturity, Total, Estimated Fair Value 12,867 14,987
Held-to-maturity Securities, Gross Unrealized Losses    
Held to maturity, Less Than 12 Months, Gross Unrealized Losses (39) (2)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses (797) (820)
Held to maturity, Total, Gross Unrealized Losses $ (836) $ (822)
Held to maturity, Less Than 12 Months, Quantity | security 3 3,000
Held to maturity, 12 Months or Longer, Quantity | security 13 14,000
Bank issued trust preferred securities    
Held-to-maturity Securities, Fair Value:    
Held to maturity, Less Than 12 Months, Estimated Fair Value   $ 495
Held to maturity, 12 Months or Longer, Estimated Fair Value   0
Held to maturity, Total, Estimated Fair Value   495
Held-to-maturity Securities, Gross Unrealized Losses    
Held to maturity, Less Than 12 Months, Gross Unrealized Losses   (4)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses   0
Held to maturity, Total, Gross Unrealized Losses   $ (4)
Held to maturity, Less Than 12 Months, Quantity | security   1,000
Held to maturity, 12 Months or Longer, Quantity | security   0