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GOODWILL AND INTANGIBLE ASSETS | 12 Months Ended
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Dec. 31, 2024
GOODWILL AND INTANGIBLE ASSETS |
GOODWILL AND INTANGIBLE ASSETS | 9.GOODWILL AND INTANGIBLE ASSETS: The Corporation completed its annual impairment testing of goodwill during the fourth quarter of 2024 and 2023. Management does not believe any amount of goodwill is impaired. Goodwill was as follows at year-end: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023 |  | 2022
Beginning of year | ​ | $ | 86,985 | ​ | $ | 86,985 | ​ | $ | 86,135
Acquired goodwill | ​ |  | 13,041 | ​ |  | — | ​ |  | 850
Impairment | ​ |  | — | ​ |  | — | ​ |  | —
End of year | ​ | $ | 100,026 | ​ | $ | 86,985 | ​ | $ | 86,985
​ Goodwill related to the acquisition of Hancock Bancorp, Inc. was increased by $850 thousand in 2022 due to adjustments to deferred tax assets related to the filing of the final Hancock Bancorp, Inc. tax return. ​ Intangible assets subject to amortization at December 31, 2024 and 2023 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023
​ | ​ | Gross | ​ | Accumulated | ​ | Gross | ​ | Accumulated
(Dollar amounts in thousands) | ​ | Amount | ​ | Amortization | ​ | Amount | ​ | Amortization
Core deposit intangible | ​ | $ | 21,858 | ​ | $ | 17,159 | ​ | $ | 21,857 | ​ | $ | 16,271
Acquired core deposit intangible | ​ |  | 19,788 | ​ |  | 2,942 | ​ |  | — | ​ |  | —
​ | ​ | $ | 41,646 | ​ | $ | 20,101 | ​ | $ | 21,857 | ​ | $ | 16,271
​ Aggregate amortization expense was $3.8 million, $1.1 million and $1.3 million for 2024, 2023 and 2022, respectively. Estimated amortization expense for the next five years is as follows: ​
​ | ​ | ​ | ​
​ |  | In thousands
2025 | ​ | $ | 5,310
2026 | ​ |  | 4,015
2027 | ​ |  | 2,995
2028 | ​ |  | 2,888
2029 | ​ |  | 2,471
​

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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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