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Goodwill and Other Intangible Assets | 9 Months Ended
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Sep. 30, 2023
Goodwill and Other Intangible Assets |
Goodwill and Other Intangible Assets | NOTE 5 Goodwill and Other Intangible Assets The following table summarizes the carrying amount of goodwill, by segment, as of September 30, 2023 and December 31, 2022: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
(dollars in thousands) |  | 2023 |  | 2022
Banking | ​ | $ | 35,260 | ​ | $ | 35,260
Retirement and benefit services | ​ | ​ | 11,523 | ​ | ​ | 11,827
Total goodwill | ​ | $ | 46,783 | ​ | $ | 47,087
​ Goodwill is evaluated for impairment on an annual basis, at a minimum, and more frequently when the economic environment warrants. The Company determined that there was no goodwill impairment as of September 30, 2023. The gross carrying amount and accumulated amortization for each type of identifiable intangible asset, as of September 30, 2023 and December 31, 2022, were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2023 | ​ | December 31, 2022
(dollars in thousands) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Total |  | Gross Carrying Amount |  | Accumulated Amortization |  | Total
Identifiable customer intangibles | ​ | $ | 41,423 | ​ | $ | (28,951) | ​ | $ | 12,472 | ​ | $ | 41,423 | ​ | $ | (25,927) | ​ | $ | 15,496
Core deposit intangible assets | ​ | ​ | 7,592 | ​ | ​ | (1,582) | ​ | ​ | 6,010 | ​ | ​ | 7,592 | ​ | ​ | (633) | ​ | ​ | 6,959
Total intangible assets | ​ | $ | 49,015 | ​ | $ | (30,533) | ​ | $ | 18,482 | ​ | $ | 49,015 | ​ | $ | (26,560) | ​ | $ | 22,455
​ Amortization of intangible assets was $1.3 million for both the three months ended September 30, 2023 and 2022. Amortization of intangible assets was $4.0 million and $3.4 million for the nine months ended September 30, 2023 and 2022, respectively.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//350/tableOfContent + Details
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