| Assets Measured at Fair Value on a Recurring Basis |
The following tables present the balances of assets measured at fair value on a recurring basis as of September 30, 2026 and December 31, 2025, by level within the fair value hierarchy: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2026 | | | Level 1 | | Level 2 | | Level 3 | | Total | | | (in thousands) | | Assets | | | | | | | | | | Fixed-maturity securities: | | | | | | | | | U.S. Treasury securities and obligations of U.S. government agencies | | $ | 838 | | | $ | — | | | $ | — | | | $ | 838 | | | | | | | | | | | Obligations of states, municipalities and political subdivisions | | — | | | 78,752 | | | — | | | 78,752 | | | Corporate and other securities | | — | | | 1,732,012 | | | — | | | 1,732,012 | | | Asset-backed securities | | — | | | 531,269 | | | — | | | 531,269 | | | Residential mortgage-backed securities | | — | | | 1,655,788 | | | — | | | 1,655,788 | | | Commercial mortgage-backed securities | | — | | | 498,666 | | | — | | | 498,666 | | | Total fixed-maturity securities | | 838 | | | 4,496,487 | | | — | | | 4,497,325 | | | | | | | | | | | | Equity securities: | | | | | | | | | | Exchange-traded funds | | 240,265 | | | — | | | — | | | 240,265 | | | Non-redeemable preferred stock | | — | | | 12,788 | | | — | | | 12,788 | | | Common stocks | | 526,180 | | | — | | | — | | | 526,180 | | | Total equity securities | | 766,445 | | | 12,788 | | | — | | | 779,233 | | | | | | | | | | | | Total | | $ | 767,283 | | | $ | 4,509,275 | | | $ | — | | | $ | 5,276,558 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | | Level 1 | | Level 2 | | Level 3 | | Total | | | (in thousands) | | Assets | | | | | | | | | | Fixed-maturity securities: | | | | | | | | | U.S. Treasury securities and obligations of U.S. government agencies | | $ | 874 | | | $ | — | | | $ | — | | | $ | 874 | | Obligations of states, municipalities and political subdivisions | | — | | | 127,860 | | | — | | | 127,860 | | | Corporate and other securities | | — | | | 1,713,888 | | | — | | | 1,713,888 | | | Asset-backed securities | | — | | | 588,519 | | | — | | | 588,519 | | | Residential mortgage-backed securities | | — | | | 1,459,270 | | | — | | | 1,459,270 | | | Commercial mortgage-backed securities | | — | | | 451,039 | | | — | | | 451,039 | | | Total fixed-maturity securities | | 874 | | | 4,340,576 | | | — | | | 4,341,450 | | | | | | | | | | | | Equity securities: | | | | | | | | | | Exchange-traded funds | | 185,523 | | | — | | | — | | | 185,523 | | | Non-redeemable preferred stock | | — | | | 24,100 | | | — | | | 24,100 | | | Common stocks | | 416,776 | | | — | | | — | | | 416,776 | | | Total equity securities | | 602,299 | | | 24,100 | | | — | | | 626,399 | | | Short-term investments | | 3,864 | | | — | | | — | | | 3,864 | | | Total | | $ | 607,037 | | | $ | 4,364,676 | | | $ | — | | | $ | 4,971,713 | |
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