| In millions, except per share items | Dec-31-18 | Sep-30-18 | Mar-31-18 | Dec-31-17 | Sep-30-17 | Jun-30-17 | Mar-31-17 | Dec-31-16 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Assets | | | | | | | | |
| Cash and due from banks | 15.2 | 14.5 | 15.5 | 9.8 | 9.3 | 13.7 | 24.4 | 15.7 |
| Federal funds sold | 11.4 | 7.5 | 7.9 | 0.3 | 1.3 | 6.5 | 4.9 | 2.6 |
| Cash and cash equivalents | 26.5 | 22.0 | 23.4 | 10.1 | 10.7 | 20.2 | 29.4 | 18.3 |
| Certificates of deposit held as investment | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Securities available for sale, at fair value | 65.6 | 68.9 | | | | | | |
| Federal Home Loan Bank stock, at cost | 2.7 | 2.8 | 3.1 | 3.1 | 2.7 | 2.0 | 2.0 | 1.6 |
| Loans | 369.5 | 375.9 | 390.4 | 389.0 | 368.2 | 707.4 | 677.9 | 663.7 |
| Allowance for loan losses | -3.0 | -3.0 | -2.8 | -2.6 | -2.5 | -2.4 | -2.2 | -2.1 |
| Net loans and leases | 366.4 | 372.9 | 387.6 | 386.4 | 365.8 | 1,056.4 | 1,012.5 | 990.9 |
| Premises and equipment, net | 3.8 | 3.8 | 3.9 | 3.9 | 3.9 | 3.7 | 3.7 | 4.2 |
| Foreclosed real estate | 0.5 | 0.6 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Accrued interest receivable | 1.4 | 1.5 | 1.5 | 1.5 | 1.5 | 1.4 | 1.3 | 1.5 |
| Bank-owned life insurance | 17.8 | 17.7 | 17.5 | 18.6 | 18.5 | 18.4 | 18.3 | 18.1 |
| Income taxes refundable | 0.0 | 0.0 | 0.0 | | | | | |
| Goodwill and other intangible assets | 9.1 | 9.1 | 9.2 | 9.2 | 9.2 | 9.3 | 9.3 | 9.4 |
| Other assets | 1.9 | 2.3 | 3.0 | 1.6 | 1.7 | 1.7 | 1.9 | 2.2 |
| Total Assets | 496.3 | 502.2 | 525.5 | 520.0 | 514.0 | 515.9 | 514.5 | 499.8 |
| |
| Liabilities | | | | | | | | |
| Noninterest-bearing deposits | 27.5 | 28.8 | 29.6 | 27.3 | 27.9 | 32.4 | 30.4 | 22.4 |
| Interest-bearing deposits | 356.6 | 359.7 | 375.6 | 365.4 | 366.3 | 379.9 | 382.5 | 385.9 |
| Total deposits | 384.2 | 388.5 | 405.1 | 392.7 | 394.2 | 412.3 | 412.9 | 408.3 |
| Borrowings | 51.1 | 53.6 | 60.7 | 62.8 | 52.9 | 36.0 | 36.1 | |
| Advances by borrowers for taxes and insurance | 1.1 | 1.2 | 2.0 | 1.1 | 1.3 | 2.8 | 1.9 | 1.1 |
| Other liabilities | 3.5 | 3.5 | 3.7 | 4.0 | 4.5 | 4.2 | 3.9 | 3.5 |
| Total liabilities | 439.8 | 446.7 | 471.5 | 460.5 | 452.8 | 455.3 | 454.7 | 439.2 |
| |
| Commitments and contingencies | | | | | | | | |
| Shareholders' Equity | | | | | | | | |
| Common stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Additional paid in capital | 32.5 | 32.4 | 32.1 | 32.1 | 31.9 | 31.8 | 31.7 | 31.6 |
| Retained earnings | 27.3 | 27.5 | 25.9 | 30.6 | 32.5 | 32.1 | 31.7 | 32.7 |
| Unearned ESOP shares | -1.9 | -2.1 | -2.1 | -2.1 | -2.2 | -2.2 | -2.2 | -2.2 |
| Accumulated other comprehensive loss | -1.5 | -2.3 | -1.9 | -1.2 | -1.1 | -1.1 | -1.4 | -1.5 |
| Total shareholders' equity | 56.5 | 55.5 | 54.1 | 59.4 | 61.2 | 60.6 | 59.8 | 60.7 |
| Total Liabilities and Shareholders' Equity | 496.3 | 502.2 | 525.5 | 520.0 | 514.0 | 515.9 | 514.5 | 499.8 |