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EMPLOYEE BENEFIT PLANS - Schedule of ESOP shares (Details) - shares | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
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Retirement Benefits [Abstract] |  |  |
Allocated shares (in shares) | 3,977,753 | 4,234,713 |
Unallocated shares (in shares) | 0 | 17,852 | 196,000
Employee stock ownership plan (ESOP) (in shares) | 3,977,753 | 4,252,565 |

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- Definition The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480459/718-40-55-20 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480459/718-40-55-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480489/718-40-50-1 + Details
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- Definition The shares that, although not legally released, will be released by a future scheduled and committed debt service payment and will be allocated to employees for service rendered in the current accounting period. The ESOP documents typically define the period of service to which the shares relate. ESOP shares are released to compensate employees directly, to settle employer liabilities for other employee benefits, and to replace dividends on allocated shares that are used for debt service. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480459/718-40-55-20 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480459/718-40-55-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480489/718-40-50-1 + Details
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- Definition Sum of the allocated, committed-to-be-released and suspense shares of the entity held by the plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480459/718-40-55-20 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480459/718-40-55-9 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480489/718-40-50-1 + Details
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