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INVESTMENT SECURITIES (Tables) | 9 Months Ended
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Jun. 30, 2025
Investment Securities [Abstract] |
Schedule of Amortized Cost and Fair Values of Investment Securities | The following table summarizes the amortized cost and fair values of securities classified as available-for-sale and held-to-maturity at June 30, 2025:
|  | June 30, 2025 |
|  |  |  |  | Gross |  |  | Gross |  |  | Allowance for |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Credit |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Losses |  |  | Value |
|  | (In thousands) |
Securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Obligations of U.S. government agencies: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage backed securities - residential |  | $ | 91 |  |  | $ | — |  |  | $ | (9 | ) |  | $ | — |  |  | $ | 82 |
Obligations of U.S. government-sponsored enterprises: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities-residential |  |  | 16,003 |  |  |  | 62 |  |  |  | (1,189 | ) |  |  | — |  |  |  | 14,876 |
Corporate securities |  |  | 6,500 |  |  |  | 146 |  |  |  | — |  |  |  | — |  |  |  | 6,646 |
Total securities available-for-sale |  | $ | 22,594 |  |  | $ | 208 |  |  | $ | (1,198 | ) |  | $ | — |  |  | $ | 21,604 |
Securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Obligations of U.S. government agencies: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities - residential |  | $ | 6,781 |  |  | $ | — |  |  | $ | (687 | ) |  | $ | — |  |  | $ | 6,094 |
Mortgage-backed securities - commercial |  |  | 4,024 |  |  |  | 19 |  |  |  | (7 | ) |  |  | — |  |  |  | 4,036 |
Obligations of U.S. government-sponsored enterprises: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage backed securities - residential |  |  | 41,601 |  |  |  | 1 |  |  |  | (5,219 | ) |  |  | — |  |  |  | 36,383 |
Debt securities |  |  | 10,500 |  |  |  | — |  |  |  | (560 | ) |  |  | — |  |  |  | 9,940 |
Private label mortgage-backed securities - residential |  |  | 179 |  |  |  | — |  |  |  | (3 | ) |  |  | — |  |  |  | 176 |
Obligations of state and political subdivisions |  |  | 3,435 |  |  |  | 1 |  |  |  | (368 | ) |  |  | — |  |  |  | 3,068 |
Corporate securities |  |  | 3,000 |  |  |  | — |  |  |  | (106 | ) |  |  | — |  |  |  | 2,894 |
Total securities held-to-maturity |  | $ | 69,520 |  |  | $ | 21 |  |  | $ | (6,950 | ) |  | $ | — |  |  | $ | 62,591 |
Total investment securities |  | $ | 92,114 |  |  | $ | 229 |  |  | $ | (8,148 | ) |  | $ | — |  |  | $ | 84,195 |
The following table summarizes the amortized cost and fair values of securities classified as available-for-sale and held-to-maturity at September 30, 2024:
|  | September 30, 2024 |
|  |  |  |  | Gross |  |  | Gross |  |  | Allowance for |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Credit |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Losses |  |  | Value |
|  | (In thousands) |
Securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Obligations of U.S. government agencies: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage backed securities - residential |  | $ | 95 |  |  | $ | — |  |  | $ | (6 | ) |  | $ | — |  |  | $ | 89 |
Obligations of U.S. government-sponsored enterprises: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities-residential |  |  | 12,652 |  |  |  | 56 |  |  |  | (1,202 | ) |  |  | — |  |  |  | 11,506 |
Corporate securities |  |  | 4,000 |  |  |  | 21 |  |  |  | — |  |  |  | — |  |  |  | 4,021 |
Total securities available-for-sale |  | $ | 16,747 |  |  | $ | 77 |  |  | $ | (1,208 | ) |  | $ | — |  |  | $ | 15,616 |
Securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Obligations of U.S. government agencies: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities - residential |  | $ | 7,209 |  |  | $ | — |  |  | $ | (611 | ) |  | $ | — |  |  | $ | 6,598 |
Mortgage-backed securities - commercial |  |  | 4,268 |  |  |  | 64 |  |  |  | (23 | ) |  |  | — |  |  |  | 4,309 |
Obligations of U.S. government-sponsored enterprises: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage backed securities - residential |  |  | 42,701 |  |  |  | 4 |  |  |  | (5,194 | ) |  |  | — |  |  |  | 37,511 |
Debt securities |  |  | 19,000 |  |  |  | 13 |  |  |  | (865 | ) |  |  | — |  |  |  | 18,148 |
Private label mortgage-backed securities - residential |  |  | 190 |  |  |  | — |  |  |  | (5 | ) |  |  | — |  |  |  | 185 |
Obligations of state and political subdivisions |  |  | 3,448 |  |  |  | 3 |  |  |  | (351 | ) |  |  | — |  |  |  | 3,100 |
Corporate securities |  |  | 3,000 |  |  |  | — |  |  |  | (234 | ) |  |  | — |  |  |  | 2,766 |
Total securities held-to-maturity |  | $ | 79,816 |  |  | $ | 84 |  |  | $ | (7,283 | ) |  | $ | — |  |  | $ | 72,617 |
Total investment securities |  | $ | 96,563 |  |  | $ | 161 |  |  | $ | (8,491 | ) |  | $ | — |  |  | $ | 88,233 |
The following tables summarize the amortized cost of held-to-maturity debt securities at June 30, 2025 and September 30, 2024, aggregated by credit quality indicator:
|  | Credit Rating at Amortized Cost |
|  | AAA/AA/A |  |  | BBB/BB/B |  |  | Non-rated |
June 30, 2025 |  | (In thousands) |
Securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
Obligations of U.S. government agencies: |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities - residential |  | $ | 6,781 |  |  | $ | — |  |  | $ | — |
Mortgage-backed securities - commercial |  |  | 4,024 |  |  |  | — |  |  |  | — |
Obligations of U.S. government-sponsored enterprises: |  |  |  |  |  |  |  |  |  |  |  |
Mortgage backed securities - residential |  |  | 41,601 |  |  |  | — |  |  |  | — |
Debt securities |  |  | 10,500 |  |  |  | — |  |  |  | — |
Private label mortgage-backed securities - residential |  |  | 179 |  |  |  | — |  |  |  | — |
Obligations of state and political subdivisions |  |  | 3,435 |  |  |  | — |  |  |  | — |
Corporate securities |  |  | 3,000 |  |  |  | — |  |  |  | — |
Total securities held-to-maturity: |  | $ | 69,520 |  |  | $ | — |  |  | $ | — |
|  | Credit Rating at Amortized Cost |
|  | AAA/AA/A |  |  | BBB/BB/B |  |  | Non-rated |
|  | (In thousands) |
September 30, 2024 |  |  |  |  |  |
Securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
Obligations of U.S. government agencies: |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities - residential |  | $ | 7,209 |  |  | $ | — |  |  | $ | — |
Mortgage-backed securities - commercial |  |  | 4,268 |  |  |  | — |  |  |  | — |
Obligations of U.S. government-sponsored enterprises: |  |  |  |  |  |  |  |  |  |  |  |
Mortgage backed securities - residential |  |  | 42,701 |  |  |  | — |  |  |  | — |
Debt securities |  |  | 19,000 |  |  |  | — |  |  |  | — |
Private label mortgage-backed securities - residential |  |  | 190 |  |  |  | — |  |  |  | — |
Obligations of state and political subdivisions |  |  | 3,448 |  |  |  | — |  |  |  | — |
Corporate securities |  |  | 3,000 |  |  |  | — |  |  |  | — |
Total securities held-to-maturity: |  | $ | 79,816 |  |  | $ | — |  |  | $ | — |
Schedule of Maturities Debt Securities and Mortgage-Backed Securities Available-for-Sale | The contractual maturities of debt securities, municipal bonds and certain information regarding mortgage-backed securities available-for-sale at June 30, 2025 are summarized in the following table:
|  | June 30, 2025 |
|  | Amortized |  |  | Fair |
|  | Cost |  |  | Value |
Securities available-for-sale |  | (In thousands) |
Debt securities: |  |  |  |  |  |  |  |
Due within 1 year |  | $ | — |  |  | $ | — |
Due after 1 but within 5 years |  |  | — |  |  |  | — |
Due after 5 but within 10 years |  |  | 6,500 |  |  |  | 6,646 |
Due after 10 years |  |  | — |  |  |  | — |
Total debt securities |  |  | 6,500 |  |  |  | 6,646 |
Mortgage-backed securities: |  |  |  |  |  |  |  |
Residential |  |  | 16,094 |  |  |  | 14,958 |
Commercial |  |  | — |  |  |  | — |
Total mortgage-backed securities |  |  | 16,094 |  |  |  | 14,958 |
Total securities available-for-sale |  | $ | 22,594 |  |  | $ | 21,604 |
Schedule of Maturities Debt Securities and Mortgage-Backed Securities Held-to-Maturity | The contractual maturities of debt securities, municipal bonds and certain information regarding mortgage-backed securities held-to-maturity at June 30, 2025 are summarized in the following table:
|  | June 30, 2025 |
|  | Amortized |  |  | Fair |
|  | Cost |  |  | Value |
Securities held-to-maturity |  | (In thousands) |
Debt securities: |  |  |  |  |  |  |  |
Due within 1 year |  | $ | 3,000 |  |  | $ | 2,994 |
Due after 1 but within 5 years |  |  | 12,474 |  |  |  | 11,683 |
Due after 5 but within 10 years |  |  | 1,461 |  |  |  | 1,225 |
Due after 10 years |  |  | — |  |  |  | — |
Total debt securities |  |  | 16,935 |  |  |  | 15,902 |
Mortgage backed securities: |  |  |  |  |  |  |  |
Residential |  |  | 48,561 |  |  |  | 42,653 |
Commercial |  |  | 4,024 |  |  |  | 4,036 |
Total mortgage-backed securities |  |  | 52,585 |  |  |  | 46,689 |
Total securities held-to-maturity |  | $ | 69,520 |  |  | $ | 62,591 |

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