| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Interest and Dividend income | | | | | | | | |
| Interest and fees on loans held for investment | 34.3 | 32.4 | 34.1 | 35.5 | 34.7 | 32.5 | 29.8 | 28.0 |
| Interest from money market funds and federal funds sold | 0.2 | 0.1 | 0.3 | 0.4 | 0.1 | 0.2 | 0.0 | 0.0 |
| Interest on debt securities | 7.6 | 2.9 | 1.0 | 0.5 | 0.5 | 0.3 | 0.4 | 0.3 |
| Total interest and dividend income | 42.2 | 35.6 | 36.8 | 38.2 | 36.4 | 34.1 | 32.2 | 29.4 |
| |
| Interest expense | | | | | | | | |
| Total interest on deposits | 5.7 | 3.3 | 4.6 | 5.2 | 3.4 | 2.7 | 2.4 | 2.2 |
| Interest from short-term debt | 0.8 | | 0.0 | 0.7 | 0.5 | 0.1 | 0.1 | 0.1 |
| Interest from long-term debt | 0.8 | 1.0 | 1.1 | 1.0 | 1.0 | 1.1 | 1.2 | 0.7 |
| Total interest expense | 7.2 | 4.3 | 5.7 | 6.8 | 4.8 | 3.9 | 3.6 | 2.9 |
| Net interest income | 34.9 | 31.3 | 31.1 | 31.4 | 31.5 | 30.2 | 28.6 | 26.5 |
| Provision for Credit Losses | 0.9 | -2.8 | | | | | | |
| Net Interest Income After Provision for Credit Losses | 34.1 | 34.1 | 27.8 | 24.0 | 28.6 | 30.2 | 28.6 | 26.2 |
| |
| Noninterest income | | | | | | | | |
| Service charges on deposit accounts | 1.1 | 1.1 | 1.2 | 1.7 | 1.5 | 1.4 | 1.2 | |
| Investment services and insurance income | 0.9 | 0.9 | | | | | | |
| Title insurance income | 1.6 | 2.1 | 2.0 | 1.5 | | | | |
| Income on bank owned life insurance | 0.7 | 0.7 | 0.6 | 0.6 | 0.5 | 0.4 | 0.5 | 0.5 |
| ATM and check card fees | 2.5 | 2.3 | | | | | | |
| Other operating income | 1.0 | 0.9 | | | | | | |
| Total noninterest income | 9.6 | 11.3 | 12.2 | 9.9 | 8.0 | 7.9 | 5.6 | 4.8 |
| |
| Noninterest expense | | | | | | | | |
| Salaries | 15.4 | 14.1 | 12.7 | 12.0 | 12.6 | 11.5 | 10.0 | 9.0 |
| |
| Employee benefits | | | | | | | | |
| Occupancy expense | 1.4 | 1.3 | 1.2 | 1.2 | 1.1 | 1.0 | 0.9 | 0.8 |
| Equipment expense | 1.2 | 1.2 | 1.2 | 1.2 | 1.0 | 0.8 | 0.7 | 0.7 |
| FDIC insurance assessment | 0.6 | 0.4 | 0.4 | 0.2 | 0.3 | 0.2 | 0.4 | 0.6 |
| Legal and professional fees | 0.8 | 1.1 | 0.7 | 0.8 | 0.6 | 0.4 | 0.4 | |
| ATM and check card fees | 1.3 | 1.1 | | | | | | |
| Telecommunication and data processing expense | 2.9 | 2.7 | 2.3 | 1.7 | | | | |
| Bank franchise tax | 0.7 | 0.7 | 0.7 | 0.7 | 0.5 | 0.7 | 0.7 | |
| Other operating expenses | 4.5 | 5.0 | 4.6 | 4.2 | | | | |
| Total noninterest expense | 34.9 | 33.3 | 29.9 | 29.5 | 26.7 | 24.7 | 21.3 | 19.6 |
| Income tax (benefit) expense | 0.5 | 1.3 | 1.1 | -0.3 | 1.0 | 4.3 | 3.1 | 2.9 |
| Net Income | 8.3 | 10.7 | 8.9 | 4.6 | 8.8 | 9.0 | 9.6 | 8.4 |
| |
| Per Common Share Data | | | | | | | | |
| Net income-basic | $2.41 | $3.25 | $2.66 | $1.32 | $2.60 | $2.63 | $2.77 | $2.40 |
| |
| Cash dividends on common stock | $1.04 | $1.04 | $1.04 | $1.02 | $1.20 | $0.94 | $0.80 | $0.73 |
| |
| Weighted average common shares outstanding | 3.4 | 3.2 | 3.2 | 3.2 | 3.2 | 3.3 | 3.3 | 3.3 |