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Goodwill and Identifiable Intangible Assets | 12 Months Ended
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Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Identifiable Intangible Assets | Note 7 – Goodwill and Identifiable Intangible Assets Goodwill The table below illustrates goodwill by segment for the years ended December 31, 2025 and 2024 ($ in thousands):
|  | General |
|  | Banking |
Balance as of January 1, 2024 |  | $ | 334,605 |
Adjustment during 2024 |  |  | — |
Balance as of December 31, 2024 |  |  | 334,605 |
Adjustment during 2025 |  |  | — |
Balance as of December 31, 2025 |  | $ | 334,605 |
Trustmark’s General Banking Segment delivers a full range of banking services to consumer, corporate, small and middle-market businesses through its extensive branch network. Trustmark performed goodwill impairment tests for the General Banking Segment during 2025, 2024 and 2023. Based on these tests, Trustmark concluded that the fair value of the General Banking Segment exceeded the book value and no impairment charge was required. Identifiable Intangible Assets At December 31, 2025 and 2024, identifiable intangible assets consisted of the following ($ in thousands):
|  | December 31, 2025 |  |  | December 31, 2024 |
|  | Gross Carrying |  |  | Accumulated |  |  | Net Carrying |  |  | Gross Carrying |  |  | Accumulated |  |  | Net Carrying |
|  | Amount |  |  | Amortization |  |  | Amount |  |  | Amount |  |  | Amortization |  |  | Amount |
Core deposit intangibles |  | $ | 87,674 |  |  | $ | 87,674 |  |  | $ | — |  |  | $ | 87,674 |  |  | $ | 87,548 |  |  | $ | 126 |
Trustmark recorded $126 thousand of amortization of identifiable intangible assets in 2025, $110 thousand in 2024 and $290 thousand in 2023. Trustmark estimates that there will be no amortization expense for identifiable intangible assets in 2026 or the following years. Trustmark continually evaluates whether events and circumstances have occurred that indicate that identifiable intangible assets have become impaired. Measurement of any impairment of such identifiable intangible assets is based on the fair values of those assets. There were no impairment losses on identifiable intangible assets recorded during 2025, 2024 or 2023.

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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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