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v3.20.4

Noninterest Income (Tables) | 12 Months Ended
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Dec. 31, 2020
Noninterest Income |
Schedule of noninterest income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended
​ | ​ | December 31,
(dollars in thousands) |  | 2020 |  | 2019 |  | 2018
Retirement and benefits | ​ | $ | 60,956 | ​ | $ | 63,811 | ​ | $ | 63,316
Wealth management | ​ |  | 17,451 | ​ |  | 15,502 | ​ | ​ | 14,900
Mortgage banking (1) | ​ |  | 61,641 | ​ |  | 25,805 | ​ | ​ | 17,630
Service charges on deposit accounts | ​ |  | 1,409 | ​ |  | 1,772 | ​ | ​ | 1,808
Net gains (losses) on investment securities (1) | ​ |  | 2,737 | ​ |  | 357 | ​ | ​ | 85
Other | ​ |  |  | ​ |  |  | ​ | ​ |
Interchange fees | ​ |  | 2,140 | ​ |  | 1,972 | ​ | ​ | 2,005
Bank-owned life insurance income (1) | ​ |  | 797 | ​ |  | 803 | ​ | ​ | 803
Misc. transactional fees | ​ |  | 1,246 | ​ |  | 1,236 | ​ | ​ | 1,106
Other noninterest income | ​ |  | 994 | ​ |  | 2,936 | ​ | ​ | 1,096
Total noninterest income | ​ | $ | 149,371 | ​ | $ | 114,194 | ​ | $ | 102,749
(1) | Not within the scope of ASC 606.

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