| In millions, except per share items | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 |
| | 10-K | 10-K | 10-K | 10-K | 10-K |
| Interest and dividend income: | | | | | |
| Interest and fees on loan | 105.4 | 81.1 | 67.2 | 60.0 | 56.2 |
| Interest on loans held for sale | 2.2 | 2.7 | 2.7 | 1.4 | 0.1 |
| Interest on taxable securities | 5.6 | 4.4 | 3.2 | 3.9 | 3.3 |
| Interest on non-taxable securities | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 |
| Other interest and dividend income | 1.6 | 1.2 | 0.8 | 0.6 | 0.5 |
| Total interest and dividend income | 115.7 | 90.3 | 74.8 | 66.8 | 61.1 |
| |
| Interest expense: | | | | | |
| Interest on deposits | 20.6 | 11.0 | 8.7 | 8.7 | 9.0 |
| Interest on FHLB borrowings | 5.5 | 5.0 | 5.1 | | |
| Interest on subordinated debentures | 0.7 | | | | |
| Total interest expense | 26.8 | 15.9 | 13.8 | 14.6 | 15.9 |
| Net interest and dividend income | 88.9 | 74.3 | 61.0 | 52.2 | 45.2 |
| Provision for loan losses | 3.8 | 2.4 | 4.2 | 1.3 | 2.6 |
| Net interest and dividend income, after provision for loan losses | 85.1 | 71.9 | 56.8 | 51.0 | 42.6 |
| |
| Noninterest income: | | | | | |
| Mortgage banking income: | | | | | |
| Changes in mortgage servicing rights fair value | -1.4 | -2.1 | -1.1 | -0.5 | -0.6 |
| Other | 32.0 | 39.3 | 52.1 | 20.7 | 2.0 |
| Total mortgage banking income | 30.6 | 37.2 | 51.0 | 20.2 | 1.4 |
| Income on retirement plan annuities | 0.4 | 0.5 | 0.4 | 0.6 | 0.8 |
| Bank-owned life insurance income | 1.7 | 1.0 | 1.1 | 1.2 | 0.4 |
| Other income | 2.9 | 3.5 | 2.6 | 1.8 | 0.9 |
| Total noninterest income | 49.2 | 54.5 | 67.1 | 35.4 | 15.6 |
| |
| Noninterest expense: | | | | | |
| Compensation and benefits | 70.6 | 66.2 | 69.1 | 45.4 | 28.7 |
| Occupancy and equipment | 13.2 | 11.7 | 10.2 | 9.2 | 7.6 |
| Data processing | 6.8 | 6.2 | 5.9 | 5.4 | 5.1 |
| Loan expenses | 5.4 | 6.9 | 9.7 | 3.9 | 0.9 |
| Marketing | 3.3 | 3.6 | 2.6 | 1.9 | 1.6 |
| Deposit expenses | 1.3 | 1.3 | 1.7 | 1.4 | 1.3 |
| Postage and printing | 1.5 | 1.4 | 1.3 | 1.2 | 1.1 |
| Professional fees | 3.8 | 4.2 | 2.7 | 2.2 | 1.8 |
| Deposit insurance | 2.1 | 1.7 | 1.5 | 1.7 | 1.6 |
| Merger expenses | 5.1 | | | | |
| Other expenses | 6.9 | 6.1 | 4.7 | 4.4 | 3.3 |
| Total noninterest expense | 120.1 | 109.4 | 114.7 | 78.0 | 54.3 |
| Income before income taxes | 14.2 | 17.1 | 9.2 | 8.3 | 3.9 |
| Income tax provision | 2.8 | 6.7 | 3.3 | 2.6 | 1.4 |
| Net income | 11.4 | 10.4 | 5.9 | 5.8 | |
| |
| Earnings per common share: | | | | | |
| Basic earnings per share (in dollars per share) | $0.36 | $0.33 | | | |
| Diluted earnings per share (in dollars per share) | $0.36 | $0.33 | | | |
| |
| Weighted average shares outstanding: | | | | | |
| Weighted average shares outstanding basic | 31.6 | 31.2 | | | |
| Weighted average shares outstanding diluted | 31.6 | 31.2 | | | |