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INVESTMENT SECURITIES - Schedule of Amortized Cost of Held-to-Maturity Debt Securities (Details) - Debt Securities [Member] - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
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AAA/AA/A [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities | $ 64,266 | $ 76,816
BBB/BB/B [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities | 3,000 | 3,000
Non-rated [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Mortgage backed securities - residential [Member] | Obligations of U.S. government agencies [Member] | AAA/AA/A [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities | 6,558 | 7,209
Mortgage backed securities - residential [Member] | Obligations of U.S. government agencies [Member] | BBB/BB/B [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Mortgage backed securities - residential [Member] | Obligations of U.S. government agencies [Member] | Non-rated [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Mortgage backed securities - residential [Member] | Obligations of U.S. government-sponsored enterprises [Member] | AAA/AA/A [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities | 40,741 | 42,701
Mortgage backed securities - residential [Member] | Obligations of U.S. government-sponsored enterprises [Member] | BBB/BB/B [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Mortgage backed securities - residential [Member] | Obligations of U.S. government-sponsored enterprises [Member] | Non-rated [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Mortgage-backed securities - commercial [Member] | Obligations of U.S. government agencies [Member] | AAA/AA/A [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities | 3,913 | 4,268
Mortgage-backed securities - commercial [Member] | Obligations of U.S. government agencies [Member] | BBB/BB/B [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Mortgage-backed securities - commercial [Member] | Obligations of U.S. government agencies [Member] | Non-rated [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Debt Securities [Member] | Obligations of U.S. government-sponsored enterprises [Member] | AAA/AA/A [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities | 9,449 | 19,000
Debt Securities [Member] | Obligations of U.S. government-sponsored enterprises [Member] | BBB/BB/B [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Debt Securities [Member] | Obligations of U.S. government-sponsored enterprises [Member] | Non-rated [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Private label mortgage-backed securities residential [Member] | Obligations of U.S. government-sponsored enterprises [Member] | AAA/AA/A [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities | 174 | 190
Private label mortgage-backed securities residential [Member] | Obligations of U.S. government-sponsored enterprises [Member] | BBB/BB/B [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Private label mortgage-backed securities residential [Member] | Obligations of U.S. government-sponsored enterprises [Member] | Non-rated [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
ObligationsOfStateAndPoliticalSubdivisionsMember | Obligations of U.S. government-sponsored enterprises [Member] | AAA/AA/A [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities | 3,431 | 3,448
ObligationsOfStateAndPoliticalSubdivisionsMember | Obligations of U.S. government-sponsored enterprises [Member] | BBB/BB/B [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
ObligationsOfStateAndPoliticalSubdivisionsMember | Obligations of U.S. government-sponsored enterprises [Member] | Non-rated [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Corporate securities [Member] | Obligations of U.S. government-sponsored enterprises [Member] | AAA/AA/A [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |
Corporate securities [Member] | Obligations of U.S. government-sponsored enterprises [Member] | BBB/BB/B [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities | 3,000 | 3,000
Corporate securities [Member] | Obligations of U.S. government-sponsored enterprises [Member] | Non-rated [Member] |  |
Obligations of U.S. government agencies: |  |
Total held to maturity debt securities |  |

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