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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Intangible Assets | The following is a summary of intangible assets subject to amortization and those not subject to amortization:
|  | December 31, 2025 |
|  | Community Banking |  |  | Total |
(In thousands) |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Core deposit intangible assets |  | $ | 137,929 |  |  | ($ | 105,662 | ) |  | $ | 137,929 |  |  | ($ | 105,662 | )
Goodwill not subject to amortization |  | $ | 2,018,848 |  |  |  |  |  |  | $ | 2,018,848 |  |  |  |  |
|  | December 31, 2024 |
|  | Community Banking |  |  | Total |
(In thousands) |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Core deposit intangible assets |  | $ | 105,165 |  |  | ($ | 96,299 | ) |  | $ | 105,165 |  |  | ($ | 96,299 | )
Goodwill not subject to amortization |  | $ | 1,888,889 |  |  |  |  |  |  | $ | 1,888,889 |  |  |  |  |
Schedule of Reconciliation of Goodwill | The following table provides a reconciliation of goodwill:
(In thousands) |  | Community Banking |  |  | Total |
Goodwill at December 31, 2024 |  | $ | 1,888,889 |  |  | $ | 1,888,889 |
Addition to goodwill from Piedmont acquisition |  |  | 129,959 |  |  |  | 129,959 |
Goodwill at December 31, 2025 |  | $ | 2,018,848 |  |  | $ | 2,018,848 |
Schedule of Anticipated Amortization Expense | The following table sets forth the anticipated amortization expense for intangible assets for the years subsequent to 2025:
Year |  | Amount |
(Dollars in thousands) |  |  |  |
2026 |  | $ | 7,351 |
2027 |  |  | 5,060 |
2028 |  |  | 4,003 |
2029 |  |  | 3,518 |
2030 |  |  | 3,086 |
2031 and thereafter |  |  | 9,249 |

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