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Noninterest Income (Tables) | 12 Months Ended
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Dec. 31, 2023
Noninterest Income |
Schedule of noninterest income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended
​ | ​ | December 31,
(dollars in thousands) |  | 2023 |  | 2022 |  | 2021
Retirement and benefits | ​ | $ | 65,294 | ​ | $ | 67,135 | ​ | $ | 71,709
Wealth management | ​ |  | 21,855 | ​ |  | 20,870 | ​ | ​ | 21,052
Mortgage banking (1) | ​ |  | 8,411 | ​ |  | 16,921 | ​ | ​ | 48,502
Service charges on deposit accounts | ​ |  | 1,280 | ​ |  | 1,434 | ​ | ​ | 1,395
Net gains (losses) on investment securities (1) | ​ |  | (24,643) | ​ |  | — | ​ | ​ | 125
Other | ​ |  |  | ​ |  |  | ​ | ​ |
Interchange fees | ​ |  | 2,222 | ​ |  | 2,246 | ​ | ​ | 2,180
Bank-owned life insurance income (1) | ​ |  | 877 | ​ |  | 836 | ​ | ​ | 793
Misc. transactional fees | ​ |  | 1,433 | ​ |  | 1,429 | ​ | ​ | 1,218
Other noninterest income | ​ |  | 3,500 | ​ |  | 352 | ​ | ​ | 413
Total noninterest income | ​ | $ | 80,229 | ​ | $ | 111,223 | ​ | $ | 147,387
(1) | Not within the scope of ASC 606.

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- References No definition available. + Details
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