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OTHER INTANGIBLES | 9 Months Ended
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Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
OTHER INTANGIBLES | OTHER INTANGIBLES Core deposit intangibles and other intangibles are recorded on the acquisition date of an entity. The Corporation has one year after the acquisition date, the measurement period, to record subsequent adjustments to these intangibles for provisional amounts recorded at the acquisition date. The Level One acquisition on April 1, 2022 resulted in a core deposit intangible of $17.2 million and other intangibles, consisting of non-compete intangibles, of $1.4 million. Details regarding the Level One acquisition are discussed in NOTE 2. ACQUISITIONS of these Notes to Consolidated Condensed Financial Statements. The carrying basis and accumulated amortization of recognized core deposit intangibles and other intangibles are noted below.
| September 30, 2023 |  | December 31, 2022
Gross carrying amount | $ | 123,285 |  |  | $ | 104,643 |
Other intangibles acquired | — |  |  | 18,642 |
Accumulated amortization | (94,004) |  |  | (87,443) |
Total core deposit and other intangibles | $ | 29,281 |  |  | $ | 35,842 |
The core deposit intangibles and other intangibles are being amortized primarily on an accelerated basis over their estimated useful lives, generally over a period of two years to ten years. Intangible amortization expenses for each of the three and nine months ended September 30, 2023 were $2.2 million and $6.6 million, respectively. This was compared to the three and nine months ended September 30, 2022 which were $2.3 million and $6.0 million, respectively. Estimated future amortization expense is summarized as follows:
| Amortization Expense
2023 | $ | 2,183 |
2024 | 7,271 |
2025 | 6,028 |
2026 | 4,910 |
2027 | 3,603 |
After 2027 | 5,286 |
| $ | 29,281 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//350-30/tableOfContent + Details
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