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Goodwill and other intangibles | 9 Months Ended
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Sep. 30, 2025
Goodwill and other intangibles |
Goodwill and other intangibles | 6. Goodwill and other intangibles: ​ The following table provides information on the significant components of goodwill and other acquired intangible assets at September 30, 2025, and December 31, 2024. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 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.
​ The aggregate amortization expense was $1.5 million and $4.9 million for the three and nine months ended September 30, 2025. The aggregate amortization expense was $1.7 million for both the three and nine months ended September 30, 2024. ​ At September 30, 2025, the estimated future remaining amortization of the core deposit intangible and wealth management customer list intangible within the years ending December 31, are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(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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- 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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