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EMPLOYEE BENEFIT PLANS - Schedule of ESOP shares (Details) - shares	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
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.

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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.

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Sum of the allocated, committed-to-be-released and suspense shares of the entity held by the plan.

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