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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2023
Accounting Policies [Abstract] |
Schedule of Goodwill and 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, 2021 | $ | 303,457 |  |  | $ | 6,562 |  |  | $ | 310,019 |
Additions | — |  |  | — |  |  | — |
Amortization | — |  |  | (1,010) |  |  | (1,010) |
Balance at September 30, 2022 | 303,457 |  |  | 5,552 |  |  | 309,009 |
Additions | 1,293 |  |  | 1,297 |  |  | 2,590 |
Amortization | — |  |  | (980) |  |  | (980) |
Balance at September 30, 2023 | $ | 304,750 |  |  | $ | 5,869 |  |  | $ | 310,619 |
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)
2024 |  | $ | 1,030 |
2025 |  | 981 |
2026 |  | 938 |
2027 |  | 763 |
2028 |  | 567 |

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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