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Stock plans (Tables) | 12 Months Ended
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Dec. 31, 2024
Stock plans |
Schedule of activity related to restricted stock | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) |  | 2024 |  | 2023 |  | 2022 |
Nonvested, January 1 |  | 58,631 |  | 39,470 |  | 36,281 | ​
Assumed in merger | ​ | 16,890 | ​ | ​ | ​ | ​ | ​
Granted shares | ​ | 8,894 |  | 23,428 |  | 19,787 | ​
Vested shares |  | (31,067) | ​ | (16,791) | ​ | (16,403) | ​
(Forfeited) surrendered shares | ​ | (14,774) | ​ | 12,524 | ​ | (195) | ​
Nonvested, December 31 |  | 38,574 |  | 58,631 |  | 39,470 | ​

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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