| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 |
| | 8-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| INTEREST AND DIVIDEND INCOME | | | | | | |
| Loans, including fees: | | | | | | |
| Taxable | | 103.9 | 102.9 | 117.3 | 111.3 | 104.3 |
| Federally tax exempt | | 2.4 | 2.3 | 2.8 | 2.7 | 2.2 |
| |
| Securities: | | | | | | |
| Taxable | | 16.9 | 13.2 | 14.9 | 14.5 | 11.5 |
| Federally tax exempt | | 4.4 | 4.7 | 5.7 | 7.2 | 7.9 |
| Interest-bearing deposits in bank | | 0.5 | 0.9 | 3.0 | 1.7 | 1.7 |
| Other interest and dividend income | | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Total interest and dividend income | | 128.2 | 124.1 | 143.7 | 137.4 | 127.6 |
| |
| INTEREST EXPENSE | | | | | | |
| Deposits | | 2.5 | 4.2 | 7.9 | 5.9 | 5.0 |
| Securities sold under agreements to repurchase | | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 |
| Borrowings | | 0.0 | 0.0 | 0.0 | 0.3 | 0.1 |
| Subordinated notes | | 1.9 | 0.6 | 1.9 | 1.8 | 1.5 |
| Junior subordinated debentures issued to capital trusts | | 1.9 | 0.6 | 1.9 | 1.8 | 1.5 |
| Total interest expense | | 12.7 | 15.5 | 27.7 | 21.8 | 18.1 |
| Net interest income | 145.9 | 122.4 | 117.6 | 133.8 | 129.4 | 121.0 |
| PROVISION FOR CREDIT LOSSES | | -8.1 | 10.5 | 3.4 | 5.7 | 3.1 |
| Net interest income after provision for credit losses | 146.6 | 130.5 | 107.1 | 130.4 | 123.7 | 117.9 |
| |
| NONINTEREST INCOME | | | | | | |
| Revenue | | | | | | |
| Mortgage servicing | | 2.8 | 3.0 | 3.1 | 3.3 | 3.4 |
| Mortgage servicing rights fair value adjustment | | 1.7 | -2.6 | -2.4 | 0.6 | -0.3 |
| Gains on sale of mortgage loans | | 5.8 | 8.8 | 3.1 | 2.9 | 4.5 |
| Gains (losses) on foreclosed assets | | 0.3 | 0.1 | 0.9 | | |
| Gains (losses) on other assets | | | | | -1.3 | 0.3 |
| Income on bank owned life insurance | | 0.0 | | | | |
| Other noninterest income | | 3.0 | 3.8 | 4.1 | 3.6 | 5.0 |
| Total noninterest income | 34.7 | 37.3 | 34.5 | 32.8 | 31.2 | 33.2 |
| |
| NONINTEREST EXPENSE | | | | | | |
| Salaries | | 49.4 | 50.6 | 49.0 | 49.1 | 51.4 |
| |
| Employee benefits | | | | | | |
| Occupancy of bank premises | | 6.8 | 6.6 | 6.9 | 7.4 | 7.3 |
| Furniture and equipment | | 2.7 | 2.4 | 2.8 | 3.0 | 3.4 |
| Data processing | | 7.3 | 6.7 | 5.6 | 5.2 | 4.9 |
| Marketing and customer relations | | 3.4 | 3.5 | 3.9 | 4.2 | 4.5 |
| Amortization of intangible assets | | 1.1 | 1.2 | 1.4 | 1.6 | 1.9 |
| FDIC insurance | | 1.0 | 0.7 | 0.2 | 0.9 | 1.0 |
| Loan collection and servicing | | 1.3 | 1.8 | 2.6 | 2.7 | 3.0 |
| Foreclosed assets | | 0.9 | 0.6 | 0.7 | 0.8 | 1.3 |
| Other noninterest expense | | 10.6 | 9.8 | 8.1 | 8.7 | 8.5 |
| Total noninterest expense | | 91.2 | 92.0 | 91.0 | 90.3 | 94.1 |
| INCOME BEFORE INCOME TAX EXPENSE | | 76.6 | 49.6 | 72.1 | | |
| INCOME TAX EXPENSE | 21.3 | 20.3 | 12.7 | 5.3 | 0.9 | 0.9 |
| NET INCOME | 60.5 | 56.3 | 36.8 | 66.9 | 63.8 | 56.1 |
| |
| EARNINGS PER SHARE - BASIC | $2.09 | $2.02 | $1.34 | $3.33 | $3.54 | $3.10 |
| EARNINGS PER SHARE - DILUTED | $2.09 | $2.02 | $1.34 | $3.33 | $3.54 | $3.10 |
| |
| WEIGHTED AVERAGE SHARES OF COMMON STOCK OUTSTANDING - Basic | 28.9 | 27.8 | 27.5 | 20.1 | 18.0 | 18.1 |
| WEIGHTED AVERAGE SHARES OF COMMON STOCK OUTSTANDING - Diluted | 28.9 | 27.8 | 27.5 | 20.1 | 18.0 | |