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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Sep. 30, 2025
Accounting Policies [Abstract] |
Schedule of Intangible Assets and Goodwill | The table below provides detail regarding the Company's intangible assets.
| Goodwill |  | Core Deposit and Other Intangibles |  | Total
| (In thousands)
Balance at September 30, 2023 | $304,750 |  | $5,869 |  | $310,619
Additions | 106,610 |  | 38,939 |  | 145,549
Amortization | — |  | (7,743) |  | (7,743)
Balance at September 30, 2024 | 411,360 |  | 37,065 |  | 448,425
Additions | 3,362 |  | 180 |  | 3,542
Amortization | — |  | (9,874) |  | (9,874)
Balance at September 30, 2025 | $414,722 |  | $27,371 |  | $442,093
Schedule of Future Amortization Expense | The table below presents the estimated future amortization expense of other intangibles for the next five years.
Fiscal Year |  | Expense
|  | (In thousands)
2026 |  | $7,332
2027 |  | 5,582
2028 |  | 5,220
2029 |  | 5,127
2030 |  | 2,343

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