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Goodwill and Other Intangible Assets | 3 Months Ended
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Mar. 31, 2026
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets (In Thousands) The carrying amounts of goodwill by operating segments as of March 31, 2026 and December 31, 2025 are set forth in the table below.
| Community Banks |  |  |  | Total |  |  |  |  |  |
Balance at December 31, 2025 | $ | 1,405,840 |  |  |  |  | $ | 1,405,840 |  |  |  |  |  |  |
Additions to goodwill from The First merger | 827 |  |  |  |  | 827 |  |  |  |  |  |  |
Balance at March 31, 2026 | $ | 1,406,667 |  |  |  |  | $ | 1,406,667 |  |  |  |  |  |  |
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, 2026 |  |  |  |  |
Core deposit intangibles | $ | 242,102 |  |  | $ | (105,930) |  |  | $ | 136,172 |
Customer relationship intangible | 7,670 |  |  | (5,450) |  |  | 2,220 |
Total finite-lived intangible assets | $ | 249,772 |  |  | $ | (111,380) |  |  | $ | 138,392 |
December 31, 2025 |  |  |  |  |
Core deposit intangibles | $ | 242,102 |  |  | $ | (97,936) |  |  | $ | 144,166 |
Customer relationship intangible | 7,670 |  |  | (5,224) |  |  | 2,446 |
Total finite-lived intangible assets | $ | 249,772 |  |  | $ | (103,160) |  |  | $ | 146,612 |
Amortization expense for finite-lived intangible assets is presented in the table below.
| Three Months Ended |  |
| March 31, |  |
| 2026 |  | 2025 |  |  |  |
Amortization expense for: |  |  |  |  |  |  |
Core deposit intangibles | $ | 7,994 |  |  | $ | 818 |  |  |  |  |
Customer relationship intangible | 226 |  |  | 262 |  |  |  |  |
Total intangible amortization | $ | 8,220 |  |  | $ | 1,080 |  |  |  |  |

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- Definition The entire disclosure for goodwill and intangible assets. + 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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