| 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 income on loans | 439.8 | 398.6 | 417.5 | 439.0 | 410.6 | 370.4 | 333.2 | 298.5 |
| Interest income on investments | 152.0 | 126.5 | 127.3 | 143.8 | 134.5 | 128.5 | 121.0 | 131.1 |
| Interest income on repurchase agreements | 4.3 | 0.9 | 0.9 | 3.6 | 3.7 | 3.9 | 2.9 | 1.1 |
| | 597.4 | 526.7 | 546.4 | 587.4 | 550.2 | 503.8 | 457.9 | 432.1 |
| Interest expense: |
| Interest on deposits | 39.7 | 15.2 | 33.0 | 68.4 | 41.1 | 22.3 | 12.6 | 9.6 |
| Interest on borrowings | | | | | | 0.1 | | |
| | 56.8 | 29.4 | 50.1 | 89.7 | 63.8 | 46.6 | 40.3 | 38.0 |
| Net interest income | 540.6 | 497.3 | 496.3 | 497.7 | 486.4 | 457.2 | 417.6 | 394.1 |
| Provision for loan losses | -7.8 | -50.5 | 117.8 | 16.0 | 13.4 | 16.9 | 4.8 | 1.0 |
| Net interest income after provision for loan losses | 548.4 | 547.8 | 378.5 | 481.7 | 472.9 | 440.3 | 412.8 | 393.1 |
| Deposit and loan fees | 29.6 | 25.6 | 24.9 | 30.1 | 28.8 | 32.6 | 33.7 | 34.1 |
| Gain on sale of investments, net | | | | | | | | 10.2 |
| Other non-interest income | 127.9 | 145.8 | 159.5 | 153.3 | 140.1 | 152.8 | 163.7 | 142.0 |
| Total non-interest income | 157.5 | 171.4 | 184.4 | 183.3 | 168.9 | 185.4 | 197.3 | 186.2 |
| Non-interest expenses | 415.3 | 393.6 | 373.8 | 379.2 | 371.6 | 357.7 | 350.6 | 348.1 |
| Pre-tax income before non-recurring items | 284.5 | 324.3 | 199.1 | 281.8 | 266.3 | 268.1 | 259.6 | 231.2 |
| Non-recurring items | -6.1 | -1.3 | 9.9 | -4.0 | -3.9 | | | |
| Pre-tax income | 290.6 | 325.6 | 189.1 | 285.8 | 270.2 | 268.1 | 259.6 | 231.2 |
| Income taxes | 64.8 | 72.2 | 35.3 | 59.9 | 50.6 | 83.4 | 78.1 | 70.5 |
| Tax rate | 22.3% | 22.2% | 18.7% | 21.0% | 18.7% | 31.1% | 30.1% | 30.5% |
| Net income | 217.9 | 250.4 | 153.8 | 225.9 | 219.6 | 184.7 | 181.5 | 160.7 |
| Net margin | 30.9% | 34.8% | 27.3% | 34.0% | 34.2% | 29.5% | 29.7% | 27.7% |
| |
| Basic EPS | $5.50 | $6.29 | $3.87 | $5.59 | $5.26 | $4.37 | $4.26 | $3.72 |
| Diluted EPS | $5.48 | $6.25 | $3.86 | $5.56 | $5.23 | $4.33 | $4.23 | $3.70 |
| |
| Shares outstanding (basic) | 39.6 | 39.8 | 39.7 | 40.4 | 41.7 | 42.3 | 42.6 | 43.2 |
| Shares outstanding (diluted) | 39.8 | 40.1 | 39.9 | 40.6 | 42.0 | 42.6 | 42.9 | 43.5 |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |