| 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 | | | | | | | | |
| Interest and fees on loans | 144.7 | 125.4 | 134.0 | 143.4 | 128.5 | 114.6 | 109.2 | 81.2 |
| Taxable interest on investments | 23.3 | 18.9 | 18.4 | 19.5 | 17.7 | 16.9 | 16.1 | 15.1 |
| Nontaxable interest on investments | 3.1 | 3.0 | 3.3 | 2.7 | 2.6 | 2.8 | 2.8 | 2.2 |
| Dividend income | 0.5 | 0.4 | 0.7 | 0.7 | 1.3 | 1.1 | | |
| Other interest income | 1.1 | 0.8 | 0.9 | 2.2 | 1.1 | 0.8 | 0.5 | |
| Total interest income | 172.8 | 148.5 | 157.2 | 168.5 | 151.4 | 136.1 | 129.6 | 99.1 |
| |
| Interest Expense | | | | | | | | |
| Interest on deposits | 20.3 | 7.9 | 15.5 | 34.0 | 20.1 | 11.8 | 8.6 | 6.5 |
| Interest on borrowings | 2.6 | 0.6 | 1.8 | 3.6 | 7.5 | | | |
| Interest on junior subordinated debentures | 2.1 | 2.5 | 3.5 | 3.3 | 3.4 | 3.4 | 3.4 | 2.7 |
| Total interest expense | 25.1 | 11.0 | 20.9 | 40.9 | 31.0 | 20.8 | 16.6 | 12.7 |
| Net interest income | 147.7 | 137.4 | 136.3 | 127.6 | 120.4 | 115.3 | 113.1 | 86.5 |
| Provision for credit losses | 4.5 | -3.2 | 12.4 | 2.9 | 0.8 | 3.0 | 5.3 | 1.9 |
| Net interest income after provision for credit losses | 143.2 | 140.6 | 123.9 | 124.8 | 119.5 | 112.3 | 107.8 | 84.5 |
| |
| Non-Interest Income | | | | | | | | |
| Revenue | | | | | | | | |
| Brokerage and insurance commissions | 4.1 | 3.9 | 2.8 | 2.6 | 2.6 | 2.1 | 2.1 | |
| Mortgage banking income, net | 4.2 | 13.7 | 18.5 | 7.8 | 5.9 | 7.4 | 6.3 | 2.0 |
| Bank-owned life insurance | 1.9 | 2.4 | 2.5 | 2.4 | 2.4 | 2.4 | 2.6 | 1.7 |
| Net loss on sale of securities | | | | | | | 0.1 | 0.0 |
| Other income | 4.0 | 3.5 | 3.4 | 4.2 | 3.3 | 3.1 | 4.8 | 3.9 |
| Total non-interest income | 40.7 | 49.7 | 50.5 | 42.1 | 38.2 | 38.6 | 39.6 | 27.5 |
| |
| Non-Interest Expense | | | | | | | | |
| Salaries and employee benefits | 62.0 | 61.0 | 57.9 | 54.5 | 51.5 | 49.1 | 47.3 | 37.2 |
| Furniture, equipment and data processing | 13.0 | 12.2 | 11.8 | 10.9 | 10.4 | 9.9 | | |
| Net occupancy costs | 7.6 | 7.5 | 7.6 | 7.0 | 6.9 | 6.9 | 7.1 | 5.7 |
| Debit card expense | 4.6 | 4.3 | 3.8 | 3.6 | 3.2 | 2.8 | 2.6 | 1.9 |
| Consulting and professional fees | 4.1 | 3.7 | 3.8 | 3.7 | 3.8 | 3.1 | 3.2 | 2.6 |
| Regulatory assessments | 2.3 | 2.1 | 1.5 | 1.3 | 1.9 | 2.2 | 2.8 | 2.2 |
| Amortization of core deposit intangible assets | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 1.8 | 1.9 | 1.3 |
| Other expenses | 12.5 | 12.3 | 12.6 | 13.1 | 12.7 | 11.8 | 11.5 | 9.2 |
| Total non-interest expense | 106.8 | 103.7 | 100.0 | 95.3 | 91.9 | 88.5 | 89.9 | 81.1 |
| Income before income tax expense | 77.0 | 86.6 | 74.4 | 71.6 | | | | |
| Income Tax Expense | 15.6 | 17.6 | 14.9 | 14.4 | 12.7 | 33.9 | 17.5 | 9.9 |
| Net Income | 61.4 | 69.0 | 59.5 | 57.2 | 53.1 | 28.5 | 40.1 | 21.0 |
| |
| Per Share Data | | | | | | | | |
| Basic earnings per share | $4.18 | $4.62 | $3.96 | $3.70 | $3.40 | $1.83 | $2.59 | $1.73 |
| Diluted earnings per share | $4.17 | $4.60 | $3.95 | $3.69 | $3.39 | $1.82 | $2.57 | $1.73 |
| |
| Cash dividends declared per share | $1.62 | $1.48 | $1.32 | $1.23 | $1.15 | $0.94 | $0.83 | $0.80 |
| |
| Weighted average number of common shares outstanding | 14.6 | 14.9 | 15.0 | 15.4 | 15.6 | 15.5 | 15.4 | 12.0 |
| Diluted weighted average number of common shares outstanding | 14.7 | 15.0 | 15.0 | 15.5 | 15.6 | 15.6 | 15.5 | 12.1 |