| 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 AND DIVIDEND INCOME | | | | | | | | |
| Interest and fees on loans | 399.7 | 280.5 | 286.6 | 340.8 | 134.5 | 73.8 | 44.7 | 33.7 |
| Debt securities | 38.7 | 32.1 | 30.7 | 29.5 | 6.6 | 3.5 | 1.4 | 1.0 |
| Deposits in financial institutions and Fed Funds sold | 6.3 | 0.6 | 1.2 | 5.5 | 3.1 | 2.3 | 0.5 | 0.2 |
| Equity securities and other investments | 4.7 | 3.2 | 3.3 | 2.9 | 0.9 | 0.0 | 0.0 | 0.0 |
| Total interest and dividend income | 449.4 | 316.5 | 321.9 | 378.8 | 145.1 | 79.6 | 46.6 | 34.9 |
| |
| INTEREST EXPENSE | | | | | | | | |
| Certificates and other time deposits | 15.3 | 9.1 | 23.7 | 38.7 | 9.7 | 0.9 | 1.4 | |
| Subordinated debentures and subordinated notes | 15.5 | 7.3 | 10.6 | 10.0 | 1.7 | 0.5 | | |
| Total interest expense | 84.8 | 35.7 | 56.1 | 93.7 | 30.0 | 11.0 | 5.6 | 3.5 |
| NET INTEREST INCOME | 364.7 | 280.8 | 265.8 | 285.1 | 115.0 | 68.5 | 41.0 | 31.5 |
| Net interest income after provision (benefit) for credit losses | 336.9 | 285.6 | 200.1 | 263.6 | 108.4 | 63.4 | 38.9 | 30.6 |
| |
| NONINTEREST INCOME | | | | | | | | |
| Service charges and fees on deposit accounts | 30.6 | 24.3 | 18.3 | 22.1 | 4.8 | 3.2 | 2.2 | |
| Loan fees | 30.6 | 24.3 | 18.3 | 22.1 | 4.8 | 3.2 | 2.2 | |
| Gain on sale of mortgage LHFS | 0.6 | 1.6 | 1.2 | | | | | |
| Government guaranteed loan income, net | 14.1 | 15.8 | 14.2 | 4.7 | 2.3 | | | |
| Equity method investment income (loss) | -5.1 | 5.8 | | | | | | |
| Customer swap income | 7.9 | 2.5 | 2.5 | | | | | |
| Other | 4.9 | 8.6 | 8.6 | 4.6 | 1.2 | 0.9 | 1.0 | 0.4 |
| Total noninterest income | 52.8 | 58.4 | 47.3 | 30.1 | 11.1 | 7.6 | 6.5 | 3.7 |
| |
| NONINTEREST EXPENSE | | | | | | | | |
| Salaries and employee benefits | 117.8 | 94.7 | 79.5 | 72.8 | 31.1 | 20.8 | 14.3 | 11.3 |
| Occupancy and equipment | 18.7 | 17.3 | 16.4 | 16.4 | 10.7 | 5.6 | 3.7 | 3.5 |
| Professional and regulatory fees | 14.1 | 12.9 | 11.7 | 11.6 | 7.3 | 4.2 | 2.8 | 2.0 |
| Data processing and software expense | 14.0 | 9.9 | 9.2 | 8.4 | 3.0 | 2.2 | 1.2 | 1.2 |
| Marketing | 7.2 | 5.3 | 3.7 | 3.3 | 1.8 | | | |
| Amortization of intangibles | 10.0 | 10.1 | 10.8 | 10.9 | 3.5 | 1.0 | 0.4 | 0.3 |
| Telephone and communications | 1.5 | 1.4 | 1.3 | 1.8 | 1.3 | 0.7 | 0.4 | 0.3 |
| Merger and acquisition (“M&A”) expense | | | | 39.0 | 5.2 | 2.7 | | |
| Other | 18.3 | 15.1 | 14.2 | 13.7 | 5.4 | 4.3 | 2.0 | 1.5 |
| Total noninterest expense | 203.1 | 167.7 | 159.4 | 177.8 | 69.3 | 42.8 | 26.4 | 21.4 |
| Income before income tax expense | 186.6 | 176.3 | 88.1 | 115.9 | | | | |
| Income tax expense | 40.3 | 36.7 | 14.2 | 25.1 | 10.9 | 13.0 | 6.5 | 4.1 |
| NET INCOME | 146.3 | 139.6 | 73.9 | 90.7 | 39.3 | 15.2 | 12.6 | 8.8 |
| |
| Basic earnings per share (“EPS”) (in dollars per share) | $2.75 | $2.83 | $1.48 | $1.71 | $1.63 | $0.82 | $1.16 | $0.86 |
| Diluted EPS (in dollars per share) | $2.71 | $2.77 | $1.48 | $1.68 | $1.60 | $0.80 | $1.13 | $0.84 |