| 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 Income | | | | | | | | |
| Loans | 140.6 | 123.5 | 120.6 | 122.2 | 99.1 | 70.5 | 49.1 | 37.0 |
| Securities – taxable | 10.7 | 8.0 | 11.1 | 13.8 | 10.6 | 10.0 | 7.3 | 3.7 |
| Securities – non-taxable | 1.8 | 1.0 | 1.7 | 2.6 | 2.8 | 2.8 | 1.9 | 0.3 |
| Other earning assets | 3.8 | 1.4 | 3.4 | 8.8 | 2.9 | 1.4 | 0.7 | 0.4 |
| Total interest income | 156.9 | 133.9 | 136.9 | 147.4 | 115.5 | 84.7 | 58.9 | 41.4 |
| |
| Interest Expense | | | | | | | | |
| Deposits | 41.8 | 29.8 | 56.0 | 69.3 | 42.5 | 24.0 | 15.9 | 8.8 |
| Other borrowed funds | 18.0 | 17.5 | 16.3 | 15.1 | 10.7 | 6.7 | 3.4 | 1.9 |
| Total interest expense | 59.8 | 47.3 | 72.3 | 84.4 | 53.2 | 30.7 | 19.2 | 10.7 |
| Net Interest Income | 97.1 | 86.6 | 64.5 | 63.0 | 62.3 | 54.0 | 39.7 | 30.8 |
| |
| Provision for credit losses 1 | | | | | | | | |
| Net Interest Income After Provision for Credit Losses | 92.1 | 85.5 | 55.2 | 57.0 | 58.4 | 49.1 | 35.4 | 28.8 |
| |
| Noninterest Income | | | | | | | | |
| Noninterest income | | | | | | | | |
| Gain on sale of loans | 11.4 | 11.6 | 8.3 | 2.1 | | | | |
| Other | 2.4 | 1.7 | 1.7 | 2.6 | 1.6 | 1.4 | 0.9 | 0.4 |
| Total noninterest income | 21.3 | 32.8 | 36.3 | 16.8 | 8.8 | 10.5 | 39.8 | 28.4 |
| |
| Noninterest Expense | | | | | | | | |
| Salaries and employee benefits | 41.6 | 38.2 | 34.2 | 27.0 | 23.2 | 21.2 | 17.4 | 14.3 |
| Marketing, advertising and promotion | 3.6 | 3.3 | 1.7 | 1.8 | 2.5 | 2.4 | 1.8 | 1.8 |
| Consulting and professional services | 4.8 | 4.1 | 3.5 | 3.7 | 3.1 | 3.1 | 3.1 | 2.4 |
| Data processing | 2.0 | 1.6 | 1.5 | 1.3 | 1.2 | 1.0 | 1.1 | 1.0 |
| Loan expenses | 4.4 | 2.1 | 2.0 | 1.1 | 0.9 | 1.0 | 0.9 | 0.6 |
| Premises and equipment | 10.7 | 7.1 | 6.4 | 6.1 | 5.0 | 4.2 | 3.7 | 2.8 |
| Deposit insurance premium | 1.2 | 1.2 | 1.8 | 1.9 | 2.0 | 1.4 | 1.2 | 0.6 |
| Other | 5.1 | 4.2 | 4.4 | 3.7 | 2.9 | 2.5 | 2.2 | 1.8 |
| Total noninterest expense | 73.3 | 61.8 | 57.7 | 46.6 | 43.2 | 36.7 | 31.5 | 25.3 |
| Income (Loss) Before Income Taxes | 40.1 | 56.6 | 33.9 | 27.2 | | | | |
| Income Tax (Benefit) Provision | 4.6 | 8.5 | 4.4 | 1.9 | 2.1 | 7.7 | 5.9 | 4.7 |
| Net Income | 35.5 | 48.1 | 29.5 | 25.2 | 21.9 | 15.2 | 12.1 | 8.9 |
| |
| Income Per Share of Common Stock | | | | | | | | |
| Basic (in dollars per share) | $3.73 | $4.85 | $2.99 | $2.51 | $2.31 | $2.14 | $2.32 | $1.97 |
| Diluted (in dollars per share) | $3.70 | $4.82 | $2.99 | $2.51 | $2.30 | $2.13 | $2.30 | $1.96 |
| |
| Weighted-Average Number of Common Shares Outstanding | | | | | | | | |
| Basic (in shares) | 9.5 | 9.9 | 9.8 | 10.0 | 9.5 | 7.1 | 5.2 | 4.5 |
| Diluted (in shares) | 9.6 | 10.0 | 9.8 | 10.0 | 9.5 | 7.1 | 5.2 | 4.6 |
| |
| Dividends Declared Per Share (in dollars per share) | $0.24 | $0.24 | $0.24 | $0.24 | $0.24 | $0.24 | $0.24 | $0.24 |