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GOODWILL AND INTANGIBLE ASSETS (Tables) | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill and Intangible Assets | Goodwill and intangible assets consist of the following:
(Dollars in thousands) | September 30, 2025 |  | December 31, 2024
Goodwill | $ | 353,898 |  |  | $ | 241,949 |
| September 30, 2025 |  | December 31, 2024
(Dollars in thousands) | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Core deposit intangibles | $ | 43,578 |  |  | $ | (41,456) |  |  | $ | 2,122 |  |  | $ | 43,578 |  |  | $ | (40,310) |  |  | $ | 3,268 |
Customer relationship intangibles | 66,394 |  |  | (26,947) |  |  | 39,447 |  |  | 30,014 |  |  | (23,053) |  |  | 6,961 |
Software intangible assets | 26,952 |  |  | (17,942) |  |  | 9,010 |  |  | 18,612 |  |  | (15,168) |  |  | 3,444 |
Other intangible assets | 5,433 |  |  | (3,721) |  |  | 1,712 |  |  | 5,627 |  |  | (3,041) |  |  | 2,586 |
| $ | 142,357 |  |  | $ | (90,066) |  |  | $ | 52,291 |  |  | $ | 97,831 |  |  | $ | (81,572) |  |  | $ | 16,259 |
Schedule of Changes in Goodwill and Intangible Assets | The changes in goodwill and intangible assets during the three and nine months ended September 30, 2025 and 2024 are as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(Dollars in thousands) | 2025 |  | 2024 |  | 2025 |  | 2024
Beginning balance | $ | 409,163 |  |  | $ | 254,652 |  |  | $ | 258,208 |  |  | $ | 257,355 |
Acquired goodwill | — |  |  | — |  |  | 111,949 |  |  | — |
Acquired intangible assets | — |  |  | — |  |  | 44,844 |  |  | 2,920 |
Amortization of intangibles | (2,956) |  |  | (3,600) |  |  | (8,756) |  |  | (9,193) |
Amortization of intangibles included in lease income | (18) |  |  | (27) |  |  | (56) |  |  | (57) |
Ending balance | $ | 406,189 |  |  | $ | 251,025 |  |  | $ | 406,189 |  |  | $ | 251,025 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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