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Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Dec. 31, 2024
Accounting Policies [Abstract] |
Schedule of Finite-Lived Intangible Assets | The table below provides detail regarding the Company's intangible assets.
| Goodwill |  | Core Deposit and Other Intangibles |  | Total
| (In thousands)
Balance at September 30, 2024 | $ | 411,360 |  |  | $ | 37,065 |  |  | $ | 448,425 |
Additions | 3,363 |  |  | 180 |  |  | 3,543 |
Amortization | — |  |  | (2,755) |  |  | (2,755) |
Balance at December 31, 2024 | $ | 414,723 |  |  | $ | 34,490 |  |  | $ | 449,213 |
Schedule of 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, 2024 | $ | 411,360 |  |  | $ | 37,065 |  |  | $ | 448,425 |
Additions | 3,363 |  |  | 180 |  |  | 3,543 |
Amortization | — |  |  | (2,755) |  |  | (2,755) |
Balance at December 31, 2024 | $ | 414,723 |  |  | $ | 34,490 |  |  | $ | 449,213 |
Schedule of Future Amortization Expense | The table below presents the estimated future amortization expense of other intangibles for the next five years as of December 31, 2024.
Fiscal Year |  | Expected Expense
|  | (In thousands)
2025 |  | $ | 7,121 |
2026 |  | 7,332 |
2027 |  | 5,582 |
2028 |  | 5,220 |
2029 |  | 5,127 |
Thereafter |  | 4,108 |
Total Intangibles Assets |  | $ | 34,490 |

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