| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 8-K | 8-K | 10-Q | 10-Q | 10-K | 8-K |
| Operating Activities: | | | | | | | | |
| Net Income | 4.8 | 11.2 | | | 12.3 | 11.4 | | |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Depreciation | 1.2 | 1.2 | | | 1.0 | 1.0 | | |
| Amortization of intangibles | 0.5 | 0.3 | | | 0.5 | 0.5 | | |
| Net amortization of security discounts/premiums | 0.1 | 0.1 | | | 0.2 | 0.2 | | |
| Noncash operating lease expense | 0.5 | 0.5 | | | 0.4 | 0.4 | | |
| Amortization of finance lease right of use asset | 0.0 | 0.0 | | | 0.0 | 0.0 | | |
| Earnings on cash surrender value of life insurance | -0.3 | -0.3 | | | -0.3 | -0.2 | -0.4 | |
| Mortgage loans originated for sale | -29.1 | -24.6 | | | -71.7 | -10.5 | -316.8 | |
| Proceeds from sales of mortgage loans originated for sale | 24.8 | 24.8 | | | 69.9 | 15.1 | | |
| Gain on sale of mortgage loans | -0.3 | -0.4 | | | -0.3 | -0.5 | -10.3 | |
| SBA loans originated for sale | -2.1 | | | | -2.0 | -0.7 | -10.9 | |
| Proceeds from sales of SBA loans originated for sale | 2.2 | | | | 2.1 | 0.7 | | |
| Gain on sale of SBA loans | -0.1 | | | | -0.1 | | | |
| Gain on sale of property, plant, and equipment | 0.0 | 0.0 | | | 0.0 | 0.0 | -0.1 | |
| Gain on sale of foreclosed assets, net | -0.1 | | | | 0.0 | | | |
| Loss on sale of bank premises and equipment held for sale | | | | | 0.5 | 0.8 | | |
| Write-off of bank premises and equipment held for sale | | | | | | 0.7 | | |
| Accretion of subordinated debt | -0.1 | -0.1 | | | -0.1 | -0.1 | | |
| Stock compensation expense | 0.3 | 0.2 | | | 0.3 | 0.2 | | |
| Change in deferred income tax benefit | -1.9 | 0.7 | | | -0.5 | 0.3 | | |
| Increase accrued interest receivable | 0.8 | -0.8 | | | -1.3 | -0.3 | | |
| Increase in other assets | -0.3 | 0.8 | | | 2.3 | -1.7 | -4.3 | |
| Increase (decrease) in accrued interest payable | 3.4 | 3.5 | | | -0.5 | 0.3 | -0.7 | |
| Decrease in operating lease liability | -0.6 | -0.6 | | | -0.6 | -0.6 | -1.8 | |
| Increase (decrease) in other liabilities | 6.1 | -4.2 | | | -0.9 | -6.4 | | |
| Net Cash Provided By Operating Activities | 10.9 | 12.9 | | | 12.9 | 10.9 | | |
| |
| Investing Activities: | | | | | | | | |
| Proceeds from the sale of available-for-sale securities | 1.8 | | | | | | | |
| Proceeds from the maturity or call of available-for-sale securities | 4.2 | 3.7 | | | 7.7 | 7.4 | | |
| Purchases of available-for-sale securities | | | | | -83.8 | -90.3 | -65.2 | |
| Purchases of held-to-maturity securities | | | | | -39.7 | -39.9 | -244.0 | |
| Stock dividends of FHLB and other bank stock | 0.2 | 0.1 | | | | | | |
| (Purchases) reduction of restricted investment in bank stock | -3.6 | | | | 4.9 | | | |
| Net cash received from acquisition | 1.1 | | | | | | | |
| Net increase in loans | -109.5 | -97.2 | | | -58.5 | -17.3 | | |
| Purchases of bank premises and equipment | -0.9 | -0.9 | | | -1.2 | -1.4 | -3.5 | |
| Proceeds from the sale of premises and equipment | 0.0 | 0.0 | | | 0.1 | 0.1 | | |
| Proceeds from the sale of foreclosed assets | 0.4 | | | | 0.1 | | | |
| Gain on bank-owned life insurance | -0.1 | | | | | | | |
| Net change in investments in tax credits and other partnerships | -2.7 | -2.2 | | | 0.0 | -4.4 | | |
| Net Cash Used In Investing Activities | -106.3 | -93.6 | | | -171.9 | -144.3 | | |
| |
| Financing Activities: | | | | | | | | |
| Net increase (decrease) in deposits | 126.0 | 99.8 | | | -286.5 | -13.0 | | |
| Proceeds from long-term debt | 25.0 | | | | | | | |
| Common stock dividends paid | -3.2 | -3.2 | | | -3.2 | -3.2 | -8.9 | |
| Proceeds from Employee and Director Stock Purchase Plan stock issuance | 0.1 | 0.1 | | | 0.1 | 0.1 | | |
| Treasury stock purchased | -4.6 | | | | -3.0 | | -0.1 | |
| Riverview restricted stock | | | | | | 0.8 | | |
| Net change in finance lease liability | 0.0 | 0.0 | | | 0.0 | 0.0 | -0.1 | |
| Net change in short-term borrowings | 24.4 | -14.6 | | | | | -125.6 | |
| Long-term debt repayment | -30.7 | -0.1 | | | -70.1 | -6.6 | -0.3 | |
| Net Cash Provided by (Used In) Financing Activities | 127.1 | 81.9 | | | -362.6 | -21.9 | | |
| Net increase (decrease) in cash and cash equivalents | 31.7 | 1.3 | | | -521.6 | -155.3 | | |
| |
| Supplemental Disclosures of Cash Flow Information: | | | | | | | | |
| Cash paid for interest | 14.8 | 10.7 | | | 0.5 | 2.9 | | |
| Cash paid for income taxes | 4.0 | | | | 3.5 | | | |
| Supplemental Noncash Disclosures: | | | | | | | | |
| Recognition of operating lease right of use assets | 1.2 | 0.1 | | | | 0.1 | | |
| Recognition of operating lease liabilities | 1.2 | 0.1 | | | | 0.1 | | |
| Obsolete Riverview asset write-off | | | | | | 0.7 | | |
| Loans transferred to foreclosed assets held for sale | 0.5 | 0.2 | | | 0.0 | 0.1 | | |
| Held-to-maturity securities purchased, not settled | | | | | 0.5 | | | |
| Fair value of assets acquired in business combinations, excluding cash | | | | | | | | |
| Goodwill recorded | | | | | | | | |
| Liabilities assumed in business combination | | | | | | | | |
| Stock issued in business combination | | | | | | | | |