| 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 |
| Cash Flows from Operating Activities | | | | | | | | |
| Net income | 28.3 | 25.9 | 16.1 | 15.3 | 11.2 | 7.2 | 7.3 | 6.3 |
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| Adjustments to reconcile net income to net cash provided by operating activities | | | | | | | | |
| Provision for credit losses | 2.4 | 0.6 | 10.7 | 2.1 | 1.4 | 1.0 | 2.4 | 1.4 |
| Provision for unfunded commitments | 0.1 | | | | | | | |
| Depreciation and amortization | 1.6 | 1.5 | 1.6 | 1.6 | 1.7 | 1.6 | | |
| Loans originated for resale | -1.8 | -5.1 | | | | -2.5 | | -4.2 |
| Proceeds from sale of loans originated for sale | 1.8 | 5.2 | | | | 2.8 | | 4.3 |
| Net (gains) losses on sale of loans held for sale | 0.0 | -0.1 | | | | -0.3 | | -0.1 |
| Net amortization of premium/discount on investment securities | 2.8 | 1.3 | 0.2 | -0.1 | 0.2 | 0.4 | 0.5 | 0.2 |
| Amortization of core deposit intangible | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | | | |
| Amortization of right of use asset | 0.4 | 0.4 | 0.6 | | | | | |
| Net change in right of use assets and lease liabilities | -0.3 | -0.4 | -0.4 | 0.1 | | | | |
| Increase in cash surrender value of bank owned life insurance | -0.9 | -0.9 | -0.9 | -0.9 | -0.9 | -0.8 | -0.8 | -0.8 |
| (Decrease) increase in deferred income tax benefit | 0.0 | 1.2 | -2.8 | -0.7 | -0.3 | 1.9 | -0.6 | -0.8 |
| (Increase) decrease in accrued interest receivable | -2.7 | 3.1 | -3.7 | -0.1 | 0.0 | -0.5 | -0.8 | -0.2 |
| Stock based compensation | 0.3 | 0.8 | 0.4 | 0.3 | 0.5 | 0.5 | 0.5 | 0.3 |
| (Increase) decrease in net deferred loan costs | -2.0 | 2.6 | | | | | | |
| (Decrease) increase in accrued expenses and other liabilities | 4.5 | -3.0 | 0.6 | 0.7 | 1.4 | 0.3 | 1.4 | 1.8 |
| Decrease in other assets | -0.1 | -0.9 | 1.2 | -2.1 | 3.7 | -1.3 | 2.0 | 1.5 |
| Net Cash Provided by Operating Activities | 6.5 | 33.2 | 28.1 | 15.7 | 19.4 | 10.1 | 12.9 | 12.5 |
| |
| Cash Flows from Investing Activities | | | | | | | | |
| Purchase of AFS investment securities | -78.4 | -327.7 | -149.4 | -50.0 | -66.1 | -26.3 | -31.3 | -2.1 |
| Proceeds from redemption or principal payments of AFS investment securities | 55.1 | 54.0 | 41.0 | 42.4 | 25.9 | 25.2 | 29.2 | 26.8 |
| Net change in loans | -217.8 | -7.6 | | | | | | |
| Purchase of premises and equipment | -1.5 | -2.6 | -0.3 | -0.8 | -1.8 | -0.8 | -4.0 | -3.5 |
| Net Cash Used in Investing Activities | -241.5 | -256.0 | -192.7 | -96.5 | -36.2 | -69.6 | -195.1 | -74.6 |
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| Cash Flows from Financing Activities | | | | | | | | |
| Net increase in deposits | 32.3 | 310.6 | 233.8 | 82.2 | 124.2 | 67.4 | 131.9 | 37.5 |
| Payments of long-term debt | -12.2 | -15.1 | -177.1 | -15.1 | | | | |
| Net decrease in short term borrowings | 79.0 | | -5.0 | -30.0 | -52.5 | 8.5 | 43.0 | 34.0 |
| Dividends paid | -3.8 | -3.2 | -2.8 | -2.7 | -2.2 | -1.8 | -1.8 | -1.9 |
| Repurchase of common stock | -3.6 | -7.0 | -0.3 | 0.0 | -0.1 | | -0.9 | -1.8 |
| Net Cash Provided by Financing Activities | -7.2 | 285.4 | 209.2 | 80.2 | 34.4 | 63.6 | 182.3 | 51.9 |
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| Supplemental Disclosures of Cash Flow Information | | | | | | | | |
| Cash paid during the period for | | | | | | | | |
| Interest | 8.9 | 4.4 | 9.1 | 18.9 | 14.2 | 10.0 | 8.0 | 6.8 |
| Income taxes | 9.2 | 8.1 | 7.1 | 6.5 | 3.5 | 7.5 | | |
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| Supplemental Schedule of Non-Cash Operating Activities | | | | | | | | |
| Issuance of common stock for payment of compensation | 0.4 | 0.2 | 0.3 | 0.2 | 0.4 | 0.2 | 0.6 | 0.3 |
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| Supplemental Schedule of Non-Cash Investing and Financing Activities | | | | | | | | |