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Goodwill and other intangibles (Tables) | 9 Months Ended
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Sep. 30, 2025
Goodwill and other intangibles |
Schedule of goodwill and other acquired intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2025
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Accumulated | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Beginning | ​ | ​ | ​ | ​ | ​ | Impairment | ​ | ​ | Year-to-Date | ​ | ​ | Ending
(Dollars in thousands) |  | ​ | Balance |  | ​ | Additions |  | ​ | Charges |  | ​ | Amortization(1) |  | ​ | Balance
Goodwill | ​ | $ | 75,986 | ​ | $ | ​ | ​ | $ | ​ | ​ | $ | ​ | ​ | $ | 75,986
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Intangible assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Core deposit intangible | ​ | $ | 33,299 | ​ | $ | ​ | ​ | $ | ​ | ​ | $ | 4,828 | ​ | $ | 28,471
Wealth management customer list intangible | ​ | ​ | 898 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 130 | ​ | ​ | 768
Total intangible assets, net | ​ | $ | 34,197 | ​ | $ | ​ | ​ | $ | ​ | ​ | $ | 4,958 | ​ | $ | 29,239
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Accumulated | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Beginning | ​ | ​ | ​ | ​ | ​ | Impairment | ​ | ​ | Year-to-Date | ​ | ​ | Ending
(Dollars in thousands) | ​ | ​ | Balance | ​ | ​ | Additions | ​ | ​ | Charges | ​ | ​ | Amortization(1) | ​ | ​ | Balance
Goodwill | ​ | $ | 63,370 | ​ | $ | 12,616 | ​ | $ | ​ | ​ | $ | ​ | ​ | $ | 75,986
Intangible assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Core deposit intangible | ​ | $ | ​ | ​ | $ | 36,629 | ​ | $ | ​ | ​ | $ | 3,330 | ​ | $ | 33,299
Wealth management customer list intangible | ​ | ​ | ​ | ​ | ​ | 988 | ​ | ​ | ​ | ​ | ​ | 90 | ​ | ​ | 898
Total intangible assets, net | ​ | $ | ​ | ​ | $ | 37,617 | ​ | $ | ​ | ​ | $ | 3,420 | ​ | $ | 34,197
(1) | Core deposit intangible amortization is included in amortization of intangible assets in the consolidated statements of income and comprehensive income. Wealth management customer list intangible amortization is included in wealth management income on the consolidated statements of income and comprehensive income.
Summary of estimated amortization expense on intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) |  | CDI | ​ | Wealth management customer list intangible | ​ | Total
2025 | ​ | $ | 1,499 | ​ | $ | 41 | ​ | $ | 1,540
2026 | ​ |  | 5,661 | ​ | ​ | 153 | ​ |  | 5,814
2027 | ​ |  | 4,995 | ​ |  | 135 | ​ |  | 5,130
2028 | ​ |  | 4,329 | ​ |  | 117 | ​ |  | 4,446
2029 | ​ | ​ | 3,663 | ​ | ​ | 99 | ​ | ​ | 3,762
Thereafter | ​ |  | 8,324 | ​ |  | 223 | ​ |  | 8,547
Total amortizing intangible | ​ | $ | 28,471 | ​ | $ | 768 | ​ | $ | 29,239
​

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