| 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 | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Operating Activities | | | | | | | | |
| Net income | 35.8 | 33.1 | 29.6 | 26.9 | 25.2 | 24.2 | 23.2 | 22.2 |
| |
| Adjustments to reconcile net income to net cash provided by operating activities | | | | | | | | |
| Depreciation and amortization | 1.3 | 1.4 | 1.4 | 1.3 | 1.2 | 1.1 | 1.0 | 1.1 |
| |
| Provision for credit losses | | | | | | | | |
| Amortization of premiums and discounts on securities | -2.5 | 0.7 | 0.8 | 0.7 | 3.5 | 0.2 | | |
| Gain on sales of loans | -0.4 | -0.4 | -0.5 | -0.6 | -0.6 | -0.6 | -0.4 | -0.3 |
| Stock-based compensation expense | 1.5 | 1.6 | 1.4 | 1.1 | 1.4 | 0.8 | 0.9 | 1.0 |
| Gain on sale of premises and equipment | | | | | 0.0 | | 0.0 | |
| Cash receipts from the sale of loans originated for sale | 24.8 | 29.1 | 33.8 | 36.2 | 31.7 | 29.3 | 24.0 | 15.3 |
| Cash disbursements for loans originated for sale | -24.2 | -28.1 | -32.8 | -34.8 | -30.4 | -29.3 | -23.7 | -15.7 |
| Deferred income tax benefit | -1.3 | -0.2 | -1.4 | 0.1 | 0.6 | -0.9 | 0.2 | -0.2 |
| |
| Changes in | | | | | | | | |
| Interest receivable and other assets | -6.4 | -5.6 | -1.9 | 1.9 | 2.7 | 2.9 | 0.9 | 0.0 |
| Interest payable and other liabilities | 0.9 | 4.9 | 4.7 | 0.2 | 0.1 | 1.8 | -0.3 | 0.9 |
| Net cash provided by operating activities | 34.9 | 41.1 | 39.7 | 36.9 | 37.6 | 32.9 | 30.0 | 29.7 |
| |
| Investing Activities | | | | | | | | |
| Maturities of interest-bearing time deposits in other banks | 4.2 | 2.7 | | 4.5 | 4.0 | 5.0 | 13.2 | 18.2 |
| Purchases of interest-bearing time deposits in other banks | -12.7 | -5.5 | -4.7 | -0.7 | -0.5 | -0.2 | | |
| Proceeds from sale of available-for-sale debt securities | | | | | | 11.8 | | |
| Maturities, prepayments and calls of available-for-sale debt securities | 15.9 | 20.7 | 19.7 | 17.0 | 8.0 | 1.4 | | |
| Purchases of available-for-sale debt securities | | | | | -133.1 | -131.1 | | |
| Net change in loans | -124.1 | -217.5 | -242.1 | -191.0 | -106.6 | -86.5 | -78.0 | -51.3 |
| Purchases of premises and equipment | -2.3 | -0.4 | -0.3 | -0.6 | -0.7 | -0.5 | -0.6 | -0.3 |
| Proceeds from sale of premises and equipment | | | | 3.4 | 3.1 | 3.0 | 0.0 | 0.0 |
| Change in nonmarketable equity securities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Net cash used in investing activities | -118.7 | -201.6 | -342.8 | -266.8 | -191.9 | -175.3 | -43.5 | -33.4 |
| |
| Financing Activities | | | | | | | | |
| Net change in deposits | 161.9 | 208.3 | 211.8 | 175.5 | 94.3 | 110.8 | 68.5 | 154.7 |
| Cash distributions | -5.1 | -4.7 | -4.4 | -4.3 | -4.2 | -4.1 | -4.0 | -3.9 |
| Shares purchased and retired for restricted stock units | -0.1 | -0.1 | | | 0.0 | -0.1 | | |
| Exercise of stock options | 0.2 | | | | | | | |
| Common stock issued for restricted stock units | 0.0 | | | | | | | |
| Net cash provided by financing activities | 156.8 | 203.5 | 207.3 | 171.4 | 90.1 | 106.6 | 64.5 | 148.8 |
| Net Increase/(Decrease) in Cash and Due from Banks | -8.4 | -38.3 | -177.2 | | -81.4 | -70.6 | | |
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| Supplemental Disclosure of Cash Flows Information | | | | | | | | |
| Interest paid | 23.6 | 15.4 | 9.1 | 5.0 | 3.1 | 3.0 | 3.2 | 3.7 |
| Income taxes paid | 15.1 | 10.0 | 10.0 | 8.3 | 7.5 | | 7.5 | 8.3 |
| Measurement period goodwill adjustment | | -0.4 | 0.1 | -0.4 | 0.2 | 0.3 | | |