| In millions, except per share items | Jun-30-23 | Jun-30-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Dec-31-20 | Sep-30-20 | Jun-30-20 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Interest income | | | | | | | | |
| Interest and fees on loans | 423.3 | 199.9 | 170.8 | 174.6 | 174.2 | 185.9 | 182.6 | 191.9 |
| |
| Interest and dividends on investment securities | | | | | | | | |
| Taxable | 35.8 | 18.3 | 13.3 | 8.7 | 8.8 | 9.7 | 13.7 | 16.1 |
| Tax-exempt | 16.0 | 16.4 | 15.6 | 14.6 | 14.4 | 14.3 | 14.5 | 14.6 |
| Other interest | 6.1 | 2.4 | 2.0 | 2.3 | 1.8 | 1.7 | 2.2 | 2.2 |
| Total interest income | 481.2 | 237.0 | 201.7 | 200.3 | 199.3 | 211.7 | 213.1 | 224.8 |
| |
| Interest expense | | | | | | | | |
| Interest on deposits | 162.2 | 8.0 | 3.7 | 4.4 | 4.6 | 7.8 | 10.0 | 13.2 |
| Interest on federal funds purchased and securities sold under agreements to repurchase | 2.3 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 |
| Interest on other short-term funding | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Interest on FHLB advances | 49.3 | 9.7 | 8.5 | 9.0 | 9.5 | 9.9 | 14.4 | 15.5 |
| Interest on long-term funding | 9.6 | 2.7 | 2.7 | 3.2 | 5.6 | 5.6 | 5.6 | 5.6 |
| Total interest expense | 223.3 | 20.8 | 15.0 | 16.6 | 19.7 | 23.7 | 30.9 | 35.0 |
| Net interest income | 257.9 | 216.1 | 186.8 | 183.7 | 179.5 | 188.0 | 182.2 | 189.9 |
| Provision for credit losses | 22.1 | 0.0 | -6.0 | -24.0 | -35.0 | 17.0 | 43.0 | 61.0 |
| Net interest income after provision for credit losses | 235.8 | 216.1 | 192.8 | 207.7 | 214.5 | 171.0 | 139.1 | 128.9 |
| |
| Noninterest income | | | | | | | | |
| Noninterest Income In Scope of Topic 606 | | | | | | | | |
| Card-based fees | | | | | | | | |
| Mortgage banking, net | 7.8 | 6.1 | 8.0 | 10.7 | 8.1 | 14.5 | 12.6 | 12.3 |
| Bank and corporate owned life insurance | 2.2 | 4.1 | | | | | | |
| Other | 2.1 | 1.9 | 2.9 | 2.1 | 3.0 | 2.9 | 2.2 | 2.7 |
| Noninterest Income, Total | 65.5 | 75.5 | 81.5 | 82.1 | 73.4 | 85.7 | 75.5 | 254.5 |
| |
| Noninterest expense | | | | | | | | |
| Personnel | 114.1 | 112.7 | 107.8 | 107.9 | 107.0 | 98.0 | 108.6 | 111.4 |
| Technology | 24.2 | 21.2 | 20.8 | 19.9 | 20.2 | 19.6 | 19.7 | 21.2 |
| Occupancy | 13.6 | 14.2 | 16.9 | 15.8 | 14.7 | 15.7 | 17.9 | 14.5 |
| Business development and advertising | 7.1 | 5.7 | 5.6 | 6.2 | 5.0 | 5.4 | 3.6 | 3.6 |
| Equipment | 5.0 | 5.0 | 4.9 | 5.2 | 5.5 | 5.6 | 5.4 | 5.3 |
| Legal and professional | 4.8 | 4.9 | 4.4 | 4.3 | 6.7 | 5.7 | 5.6 | 5.1 |
| FDIC assessment | 9.6 | 5.4 | 4.8 | 5.0 | 3.6 | 5.7 | 3.9 | 5.3 |
| Other intangible amortization | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 2.3 | 2.3 | 2.9 |
| Other | 8.5 | 8.8 | 13.2 | 9.8 | 7.0 | 11.1 | 14.0 | 10.8 |
| Total noninterest expense | 190.7 | 181.4 | 182.2 | 177.9 | 174.5 | 172.9 | 227.6 | 183.4 |
| Income before income taxes | 110.7 | 110.2 | 92.0 | 111.9 | 113.5 | 83.9 | -12.9 | 200.0 |
| Income tax expense | 23.5 | 23.4 | 15.2 | 23.1 | 22.5 | 16.9 | -58.1 | 51.2 |
| Tax rate | 21.3% | 21.2% | 16.5% | 20.6% | 19.8% | 20.1% | 450.5% | 25.6% |
| Net income | 87.2 | 86.8 | 76.9 | 88.8 | 91.0 | 67.0 | 45.2 | 148.7 |
| Preferred stock dividends | 2.9 | 2.9 | 2.9 | 4.2 | 4.9 | 5.2 | 5.2 | 4.1 |
| Net income available to common equity | 84.3 | 83.9 | 74.0 | 84.7 | 86.1 | 61.8 | 40.0 | 144.6 |
| |
| Earnings per common share | | | | | | | | |
| Basic | $0.56 | $0.56 | $0.50 | $0.56 | $0.56 | $0.40 | $0.26 | $0.94 |
| Diluted | $0.56 | $0.56 | $0.49 | $0.56 | $0.56 | $0.40 | $0.26 | $0.94 |
| |
| Average common shares outstanding | | | | | | | | |
| Basic | 150.0 | 149.1 | 150.8 | 150.0 | 152.0 | 153.0 | 152.4 | 152.4 |
| Diluted | 150.9 | 150.2 | 152.0 | 151.1 | 153.4 | 153.6 | 153.2 | 153.2 |