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GOODWILL AND OTHER INTANGIBLES | 12 Months Ended
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Dec. 31, 2023
GOODWILL AND OTHER INTANGIBLES |
GOODWILL AND OTHER INTANGIBLES | ​ NOTE 5. GOODWILL AND OTHER INTANGIBLES The activity impacting goodwill in 2023 and 2022 is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2023 |  | 2022
Balance at beginning of year | ​ | $ | 119,477 | ​ | $ | 119,477
Acquisition | ​ |  | — | ​ |  | —
Balance at end of year | ​ | $ | 119,477 | ​ | $ | 119,477
​ In the fourth quarter of 2023, we completed annual goodwill impairment testing using balance sheet and market data as of September 30, 2023. The analysis was performed at the consolidated Bank level, which is considered the smallest reporting unit carrying goodwill. No goodwill impairment was recognized for the years ended December 31, 2023, 2022 and 2021. ​ The components of other intangible assets in 2023 and 2022 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2023
​ | ​ | Gross | ​ | Accumulated | ​ | Net Intangible
(in thousands) |  | Intangible Assets |  | Amortization |  | Assets
Core deposit intangible (non-maturity deposits) | ​ | $ | 9,483 | ​ | $ | (5,686) | ​ | $ | 3,797
Customer list and other intangibles | ​ |  | 2,118 | ​ |  | (1,046) | ​ |  | 1,072
Total | ​ | $ | 11,601 | ​ | $ | (6,732) | ​ | $ | 4,869
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2022
​ | ​ | Gross | ​ | Accumulated | ​ | Net Intangible
(in thousands) |  | Intangible Assets |  | Amortization |  | Assets
Core deposit intangible (non-maturity deposits) | ​ | $ | 9,483 | ​ | $ | (4,948) | ​ | $ | 4,535
Customer list and other intangibles | ​ |  | 2,118 | ​ |  | (852) | ​ |  | 1,266
Total | ​ | $ | 11,601 | ​ | $ | (5,800) | ​ | $ | 5,801
​ Other intangible assets are amortized on a straight-line basis over their estimated lives, which range from five years to 11 years. Amortization expenses related to intangibles totaled $932 thousand in 2023, $932 thousand in 2022 and $940 thousand in 2021. The estimated aggregate future amortization expense for other intangible assets remaining at year end 2023 is as follows: ​
​ | ​ | ​ | ​
​ | ​ | Other Intangible
(in thousands) |  | Assets
2024 | ​ | $ | 932
2025 | ​ |  | 932
2026 | ​ |  | 932
2027 | ​ |  | 932
2028 | ​ |  | 959
and thereafter | ​ |  | 182
Total | ​ | $ | 4,869
​

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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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