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Goodwill and Other Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Carrying Amounts of Goodwill by Operating Segments | The carrying amounts of goodwill by operating segments for the three months ended March 31, 2024 are set forth in the table below.
| Community Banks |  | Insurance |  | Total
Balance at January 1, 2024 | $ | 988,898 |  |  | $ | 2,767 |  |  | $ | 991,665 |
Additions to goodwill and other adjustments | — |  |  | — |  |  | — |
Balance at March 31, 2024 | $ | 988,898 |  |  | $ | 2,767 |  |  | $ | 991,665 |
Schedule of Finite-Lived Intangible Assets | The following table provides a summary of finite-lived intangible assets as of the dates presented:
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
March 31, 2024 |  |  |  |  |
Core deposit intangibles | $ | 82,492 |  |  | $ | (69,297) |  |  | $ | 13,195 |
Customer relationship intangible | 7,670 |  |  | (3,282) |  |  | 4,388 |
Total finite-lived intangible assets | $ | 90,162 |  |  | $ | (72,579) |  |  | $ | 17,583 |
December 31, 2023 |  |  |  |  |
Core deposit intangibles | $ | 82,492 |  |  | $ | (68,383) |  |  | $ | 14,109 |
Customer relationship intangible | 7,670 |  |  | (2,984) |  |  | 4,686 |
Total finite-lived intangible assets | $ | 90,162 |  |  | $ | (71,367) |  |  | $ | 18,795 |
Schedule of Current Year Amortization Expense for Finite-Lived Intangible Assets | Current year amortization expense for finite-lived intangible assets is presented in the table below.
|  |  | Three Months Ended
|  |  | March 31,
|  |  |  |  | 2024 |  | 2023
Amortization expense for: |  |  |  |  |  |  |
Core deposit intangibles |  |  |  |  | $ | 914 |  |  | $ | 1,092 |
Customer relationship intangible |  |  |  |  | 298 |  |  | 334 |
Total intangible amortization |  |  |  |  | $ | 1,212 |  |  | $ | 1,426 |
Schedule of Estimated Amortization Expense of Finite-Lived Intangible Assets | The estimated amortization expense of finite-lived intangible assets for the year ending December 31, 2024 and the succeeding four years is summarized as follows:
| Core Deposit Intangibles |  | Customer Relationship Intangible |  | Total
2024 | $ | 3,498 |  |  | $ | 1,192 |  |  | $ | 4,690 |
2025 | 3,102 |  |  | 1,048 |  |  | 4,150 |
2026 | 2,899 |  |  | 860 |  |  | 3,759 |
2027 | 2,774 |  |  | 628 |  |  | 3,402 |
2028 | 1,836 |  |  | 483 |  |  | 2,319 |

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