| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Interest Income | | | | | | | | |
| Loans | 165.7 | 151.3 | 140.6 | 131.9 | 127.4 | 125.8 | 123.5 | 122.8 |
| Securities – taxable | 13.4 | 12.1 | 10.7 | 9.5 | 9.1 | 8.4 | 8.0 | 8.0 |
| Securities – non-taxable | 2.8 | 2.3 | 1.8 | 1.3 | 1.1 | 1.0 | 1.0 | 1.1 |
| Other earning assets | 13.0 | 7.2 | 3.8 | 2.8 | 1.9 | 1.5 | 1.4 | 1.5 |
| Total interest income | 194.9 | 172.9 | 156.9 | 145.4 | 139.4 | 136.6 | 133.9 | 133.3 |
| |
| Interest Expense | | | | | | | | |
| Deposits | 91.3 | 63.0 | 41.8 | 29.4 | 26.0 | 27.3 | 29.8 | 34.0 |
| Other borrowed funds | 20.3 | 19.0 | 18.0 | 17.1 | 17.5 | 17.6 | 17.5 | 17.4 |
| Total interest expense | 111.5 | 82.0 | 59.8 | 46.5 | 43.5 | 44.9 | 47.3 | 51.4 |
| Net Interest Income | 83.4 | 90.9 | 97.1 | 98.9 | 95.9 | 91.8 | 86.6 | 81.9 |
| |
| Provision for credit losses 1 | | | | | | | | |
| Net Interest Income After Provision for Credit Losses | 69.3 | 77.3 | 92.1 | 96.3 | 94.1 | 91.2 | 85.5 | 77.8 |
| |
| Noninterest Income | | | | | | | | |
| Noninterest income | | | | | | | | |
| Gain on sale of loans | 14.5 | 11.6 | 11.4 | 12.6 | 12.7 | 13.7 | 11.6 | 11.2 |
| Other | 2.4 | 2.3 | 2.4 | 1.2 | 1.8 | 1.8 | 1.7 | 1.8 |
| Total noninterest income | 21.4 | 19.9 | 21.3 | 23.1 | 26.6 | 31.3 | 32.8 | 37.8 |
| |
| Noninterest Expense | | | | | | | | |
| Salaries and employee benefits | 43.3 | 43.5 | 41.6 | 41.3 | 40.2 | 38.6 | 38.2 | 37.2 |
| Marketing, advertising and promotion | 3.4 | 3.6 | 3.6 | 3.6 | 3.4 | 3.3 | 3.3 | 2.8 |
| Consulting and professional services | 3.3 | 3.8 | 4.8 | 5.2 | 5.1 | 5.0 | 4.1 | 3.6 |
| Data processing | 2.2 | 2.2 | 2.0 | 1.8 | 1.7 | 1.6 | 1.6 | 1.7 |
| Loan expenses | 5.2 | 4.8 | 4.4 | 4.1 | 3.3 | 3.2 | 2.1 | 2.1 |
| Premises and equipment | 11.2 | 10.9 | 10.7 | 10.0 | 8.8 | 8.0 | 7.1 | 6.5 |
| Deposit insurance premium | 2.1 | 1.4 | 1.2 | 1.1 | 1.1 | 1.1 | 1.2 | 1.4 |
| Other | 5.4 | 5.1 | 5.1 | 4.6 | 4.5 | 4.5 | 4.2 | 4.2 |
| Total noninterest expense | 76.1 | 75.4 | 73.3 | 71.7 | 68.2 | 65.3 | 61.8 | 59.4 |
| Income (Loss) Before Income Taxes | 14.6 | 21.8 | 40.1 | 47.7 | 52.6 | 57.3 | 56.6 | 42.1 |
| Income Tax (Benefit) Provision | -1.1 | 0.4 | 4.6 | 6.1 | 7.3 | 8.4 | 8.5 | 9.5 |
| Net Income | 15.7 | 21.3 | 35.5 | 41.7 | 45.3 | 48.9 | 48.1 | 46.7 |
| |
| Income Per Share of Common Stock | | | | | | | | |
| Basic (in dollars per share) | $1.69 | $2.24 | $3.71 | $4.28 | $4.61 | $4.94 | $4.86 | $4.72 |
| Diluted (in dollars per share) | $1.69 | $2.24 | $3.71 | $4.27 | $4.59 | $4.91 | $4.82 | $4.69 |
| |
| Weighted-Average Number of Common Shares Outstanding | | | | | | | | |
| Basic (in shares) | 9.2 | 9.4 | 9.6 | 9.7 | 9.8 | 9.9 | 9.9 | 9.9 |
| Diluted (in shares) | 9.3 | 9.5 | 9.7 | 9.8 | 9.9 | 10.0 | 10.0 | 9.9 |
| |
| Dividends Declared Per Share (in dollars per share) | $0.24 | $0.24 | $0.24 | $0.24 | $0.24 | $0.24 | $0.24 | $0.24 |