| Fiscal period | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
| Period End Date | 12/31/2025 | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 |
| Direct | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Assumed | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Ceded | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Earned Premiums | 1,139.01 | 1,010.70 | 834.41 | 758.51 | 774.33 | 771.08 | 788.78 | 781.59 | 774.42 | 755.76 |
| Net realized gains on investments | 17.98 | 7.72 | 1.33 | 9.19 | 14.89 | 0.96 | 2.98 | 3.23 | 6.04 | 5.56 |
| Gross realized gains - Fixed maturity securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gross realized gains - Equity securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gross realized losses - Fixed maturity securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gross realized losses - Equity securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gross realized gains - Short term securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Earnings from partnership investments | 8.46 | 10.27 | 5.54 | 12.48 | 19.83 | 6.90 | 1.94 | 6.92 | 2.08 | 3.19 |
| Net impairment losses on investments (a) | -- | -- | -- | -- | -- | -- | (0.89) | (0.23) | (0.26) | (0.80) |
| Change in net unrealized gains on equity investments | (0.80) | 3.95 | 7.50 | (44.39) | 16.13 | 10.45 | 21.45 | (16.32) | -- | -- |
| Net investment income | 62.73 | 55.72 | 56.38 | 46.73 | 44.14 | 41.05 | 46.67 | 43.79 | 38.76 | 38.41 |
| Other | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Investment expenses | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Interest and dividends on fixed maturities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Dividends on equity securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Interest on cash and cash equivalents | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Dividends on preferred stocks | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Interest on short term securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Finance and other service income | 25.65 | 23.70 | 19.39 | 14.46 | 15.24 | 16.87 | 16.83 | 17.53 | 18.07 | 17.70 |
| Credit loss expense | 1.20 | 0.01 | (0.53) | 0.01 | 0.36 | (1.05) | -- | -- | -- | -- |
| Commission income | 9.50 | 7.94 | 6.93 | 0.57 | -- | -- | -- | -- | -- | -- |
| Total revenue | 1,263.73 | 1,120.02 | 930.96 | 797.56 | 884.91 | 846.25 | 877.75 | 836.50 | 839.11 | 819.82 |
| Losses and loss adjustment expenses | 797.18 | 716.64 | 642.30 | 491.98 | 461.73 | 404.56 | 509.85 | 485.51 | 503.89 | 493.43 |
| Direct | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Ceded | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Assumed | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Underwriting, operating and related expenses | 330.40 | 305.32 | 256.58 | 245.15 | 258.39 | 266.48 | 244.14 | 246.64 | 248.44 | 233.02 |
| Other Expenses | (7.94) | (7.68) | (6.84) | (0.33) | -- | -- | -- | -- | -- | -- |
| Interest expenses | 1.53 | 0.51 | 0.82 | 0.52 | 0.52 | 0.44 | 0.09 | 0.09 | 0.09 | 0.09 |
| Total expenses | 1,137.05 | 1,030.15 | 906.54 | 737.98 | 720.64 | 671.48 | 754.07 | 732.25 | 752.41 | 726.54 |
| Income before income taxes | 126.68 | 89.87 | 24.42 | 59.58 | 164.27 | 174.77 | 123.68 | 104.25 | 86.70 | 93.28 |
| Income tax expense | 27.43 | 19.13 | 5.55 | 13.02 | 33.56 | 36.56 | 24.08 | 21.06 | 24.31 | 28.70 |
| Current Income Taxes: Federal | 29.05 | 18.68 | 3.61 | 21.32 | 28.22 | -- | -- | 26.55 | 22.20 | 26.93 |
| Current Income Taxes: State | 0.31 | 0.08 | 0.28 | 0.07 | 0.02 | -- | -- | 0.11 | 0.03 | 0.09 |
| Deferred Income Taxes: Federal | (1.93) | 0.38 | 1.66 | (8.37) | 5.32 | -- | -- | (5.60) | 2.09 | 1.68 |
| Deferred Income Taxes: State | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net income (loss) before extraordinary item | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Consolidated Net income | 99.26 | 70.73 | 18.88 | -- | 130.71 | 138.21 | -- | 83.20 | 62.39 | -- |
| Dividends on mandatorily redeemable preferred stock | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Allocation of income for participating shares | -- | 0.32 | -- | -- | (0.58) | (0.64) | -- | 0.50 | 0.39 | -- |
| Net income available to common stockholders | 99.26 | 70.42 | 18.88 | 46.56 | 131.29 | 138.85 | 99.60 | 82.70 | 62.00 | 64.59 |
| Net income (loss) available to common shareholders before extraordinary item: Basic | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net income available to common shareholders: Basic | 6.72 | 4.79 | 1.28 | 3.17 | 8.85 | 9.25 | 6.52 | 5.48 | 4.13 | 4.29 |
| Net income (loss) available to common shareholders before extraordinary item: Diluted | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net income available to common shareholders: Diluted | 6.70 | 4.78 | 1.28 | 3.15 | 8.80 | 9.18 | 6.46 | 5.43 | 4.10 | 4.27 |
| Weighted average number of common shares outstanding:Basic | 14.71 | 14.69 | 14.66 | 14.61 | 14.83 | 15.00 | 15.20 | 15.08 | 15.01 | 14.95 |
| Weighted average number of common shares outstanding:Diluted | 14.75 | 14.72 | 14.71 | 14.71 | 14.93 | 15.12 | 15.34 | 15.23 | 15.14 | 15.03 |