| 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/A | 10-K |
| Interest income on investments | 24.7 | 17.1 | 14.3 | 14.9 | 12.8 | 11.7 | 8.3 | 11.9 |
| Interest income on repurchase agreements | 0.1 | 0.0 | 0.1 | 0.2 | 0.3 | 0.2 | | 0.3 |
| Total interest income | 197.7 | 178.2 | 176.4 | 185.4 | 171.5 | 155.7 | 146.6 | 144.0 |
| Interest on deposits | 24.1 | 12.8 | 21.2 | 33.4 | 23.7 | 14.4 | 10.9 | 9.6 |
| Total interest expense | 28.6 | 15.1 | 25.5 | 40.5 | 29.3 | 18.3 | 10.9 | 11.8 |
| Net interest income | 169.1 | 163.1 | 151.0 | 144.9 | 142.2 | 137.4 | 133.0 | 132.2 |
| Provision for loan losses | | | | | 6.2 | 7.5 | 7.9 | 8.7 |
| Net interest income after provision for loan losses | 169.1 | 163.1 | 151.0 | 144.9 | 136.0 | 129.9 | 125.1 | 123.6 |
| Deposit and loan fees | 29.0 | 26.5 | 23.5 | 26.4 | 26.0 | 25.1 | 25.0 | 24.3 |
| Gain on sale of investments, net | -0.2 | -0.2 | 1.8 | 0.8 | -0.1 | | | -0.1 |
| Other non-interest income | 29.0 | 34.1 | 29.3 | 23.0 | 26.1 | 23.4 | 23.5 | 22.6 |
| Total non-interest income | 57.9 | 60.5 | 54.6 | 50.2 | 52.0 | 48.5 | 48.4 | 46.8 |
| Non-interest expenses | 121.1 | 119.3 | 119.2 | 118.3 | 117.4 | 109.9 | 107.1 | 105.4 |
| Pre-tax income before non-recurring items | 102.2 | 111.8 | 71.9 | 74.0 | 72.2 | 70.2 | 66.5 | 67.2 |
| Non-recurring items | 1.2 | 1.2 | 1.6 | 2.0 | 1.6 | 1.7 | | 2.2 |
| Pre-tax income | 101.0 | 110.6 | 70.3 | 72.0 | 70.5 | 68.5 | 66.5 | 65.0 |
| Income taxes | 19.2 | 22.7 | 10.8 | 7.5 | 11.3 | 17.0 | 19.1 | 18.5 |
| Tax rate | 19.0% | 20.5% | 15.3% | 10.4% | 16.0% | 24.8% | 28.8% | 28.5% |
| Net income | 81.8 | 87.9 | 59.5 | 64.5 | 59.2 | 51.5 | 47.3 | 46.4 |
| Net margin | 36.0% | 39.3% | 28.9% | 33.1% | 31.5% | 28.9% | 27.3% | 27.2% |
| |
| Basic EPS | $4.59 | $4.94 | $3.35 | $3.64 | $3.35 | $2.92 | $2.70 | $2.66 |
| Diluted EPS | $4.58 | $4.94 | $3.35 | $3.64 | $3.35 | $2.92 | $2.70 | $2.66 |
| |
| Shares outstanding (basic) | 17.8 | 17.8 | 17.7 | 17.7 | 17.7 | 17.6 | 17.5 | 17.4 |
| Shares outstanding (diluted) | 17.9 | 17.8 | 17.8 | 17.7 | 17.7 | 17.7 | 17.6 | 17.5 |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |