| 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 | 10-Q | 10-Q | 10-Q | 8-K | 10-Q |
| CASH FLOWS FROM OPERATING ACTIVITIES: | | | | | | | | |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Net accretion of acquisition accounting estimates | -1.3 | -1.3 | | -1.2 | -0.9 | -0.6 | | -0.2 |
| Provision for credit losses | 2.6 | 2.1 | | 1.5 | 1.1 | 1.5 | | 2.4 |
| Depreciation and amortization | 4.1 | 4.1 | | 4.3 | 3.6 | 2.9 | | 2.6 |
| Net amortization of securities | 1.0 | 0.9 | | 1.1 | 1.1 | 1.2 | | 1.2 |
| (Gain) on mortgage banking activities | -2.2 | -1.6 | | -2.5 | -1.9 | -1.7 | | |
| Stock-based compensation expense | 0.5 | 0.5 | | 0.5 | 0.4 | 0.3 | | 0.4 |
| Deferred income tax (benefit) expense | -1.5 | -0.9 | | -0.7 | -0.2 | -0.4 | | -0.9 |
| Gain (loss) on sales and valuation adjustments on other real estate owned | | 0.1 | | | 0.0 | 0.0 | | |
| Fair value adjustment on equity securities | 0.1 | 0.1 | | 0.2 | 0.1 | 0.1 | | 0.0 |
| Net changes in: | | | | | | | | |
| Accrued interest receivable | 0.4 | 1.1 | | -0.7 | 0.0 | 0.4 | | 2.3 |
| Other assets | -3.1 | -0.7 | | -0.3 | 0.1 | -0.7 | | -1.1 |
| Accrued interest payable | 1.5 | 0.4 | | -0.2 | -0.4 | -0.4 | | -0.1 |
| Other liabilities | -1.3 | 1.9 | | -4.0 | -3.4 | -4.3 | | 2.1 |
| Net cash provided by operating activities | 17.7 | 36.1 | | 50.1 | 48.1 | 36.9 | | 24.4 |
| |
| CASH FLOWS FROM INVESTING ACTIVITIES: | | | | | | | | |
| Proceeds from maturities and principal payments of investment securities available for sale | 48.7 | 52.2 | | 57.3 | 44.5 | 36.1 | | 44.0 |
| Purchases of securities held to maturity | | | | -207.5 | -156.2 | -166.9 | | -259.8 |
| Purchases of equity securities | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 | | -13.0 |
| Purchase of restricted securities | -24.0 | -11.4 | | | | -5.7 | | |
| Net change in loans | -333.1 | -331.4 | | -280.9 | -166.2 | -94.2 | | -70.7 |
| Purchases of premises and equipment | -2.3 | -1.9 | | -2.3 | -3.8 | -3.4 | | -3.7 |
| Proceeds from sales of other real estate owned | 0.7 | 0.3 | | | 0.4 | 0.1 | | |
| Purchases of bank owned life insurance | -0.2 | -0.2 | | -10.1 | -10.1 | -10.1 | | -10.5 |
| Proceeds from disposal of premises held for sale | 0.7 | 0.3 | | | 0.4 | 0.1 | | |
| Net cash (used in) investing activities | -425.2 | -478.2 | | -448.8 | -271.3 | -216.2 | | -284.1 |
| |
| CASH FLOWS FROM FINANCING ACTIVITIES: | | | | | | | | |
| Noninterest-bearing deposits | -78.4 | -35.9 | | -33.7 | -21.5 | -30.0 | | 89.6 |
| Interest-bearing deposits | 7.4 | -32.0 | | 23.2 | 147.3 | 289.8 | | 334.4 |
| Short-term borrowings | 236.0 | 91.5 | | | | -4.1 | | 2.5 |
| Common stock dividends paid | -7.2 | -7.2 | | -7.1 | -6.2 | -5.2 | | -5.7 |
| Net cash provided by (used in) financing activities | 158.2 | 16.7 | | -21.6 | 116.2 | 250.5 | | 414.0 |
| |
| Supplemental cash flows information: | | | | | | | | |
| Interest paid | 25.4 | 18.1 | | 7.7 | 5.7 | 7.0 | | 6.1 |
| Income taxes paid | 11.2 | 7.3 | | 7.1 | 4.9 | | | 6.6 |
| Recognition (remeasurement of) lease liabilities arising from right-of-use assets | | -0.6 | | -1.3 | 0.5 | 0.5 | | |
| Transfers from loans to other real estate owned | | | | | | 0.3 | | |