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Goodwill and Core Deposit Intangibles (Tables) | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Core Deposit Intangibles | Changes in the carrying amount of the Company’s goodwill and core deposit intangibles for the nine months ended September 30, 2025, and the year ended December 31, 2024 were as follows:
|  | Goodwill |  |  | Core Deposit Intangibles |
|  | (Dollars in thousands) |
Balance as of December 31, 2023 |  | $ | 3,396,086 |  |  | $ | 63,994 |
Less: |  |  |  |  |  |
Amortization |  |  | — |  |  |  | (15,670 | )
Add: |  |  |  |  |  |
Measurement period adjustment of First Bancshares merger |  |  | 316 |  |  |  | — |
Lone Star merger |  |  | 106,727 |  |  |  | 17,723 |
Balance as of December 31, 2024 |  |  | 3,503,129 |  |  |  | 66,047 |
Less: |  |  |  |  |  |
Amortization |  |  | — |  |  |  | (10,853 | )
Add: |  |  |  |  |  |
Measurement period adjustment of Lone Star merger |  |  | (2 | ) |  |  | — |
Balance as of September 30, 2025 |  | $ | 3,503,127 |  |  | $ | 55,194 |
Estimated Aggregate Future Amortization Expense for Core Deposit Intangibles | The estimated aggregate future amortization expense for core deposit intangibles remaining as of September 30, 2025, is as follows (dollars in thousands):
Remaining 2025 |  | $ | 3,589 |
2026 |  |  | 12,763 |
2027 |  |  | 11,262 |
2028 |  |  | 9,958 |
2029 |  |  | 7,609 |
Thereafter |  |  | 10,013 |
Total |  | $ | 55,194 |

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