Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022 |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | $ 767,491 | $ 607,572 |
Total fixed maturity securities, held-to-maturity | 42,587 | 46,771 |
Equity securities, at fair value | 127,861 | 120,169 |
Mortgage loans | 32,762 | 52,842 |
Short-term investments | 190,670 | 121,158 |
Total investments | 1,161,371 | 948,512 |
U.S. government securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 44,483 | 48,541 |
Corporate securities and miscellaneous | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 293,560 | 235,129 |
Municipal securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 70,973 | 57,727 |
Residential mortgage-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 196,946 | 119,856 |
Commercial mortgage-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 17,979 | 36,495 |
Asset-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 143,550 | 109,824 |
Total fixed maturity securities, held-to-maturity | 42,587 | 46,771 |
Common stocks: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 61,674 | 55,996 |
Common stocks: | Consumer discretionary | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 1,963 | 1,948 |
Common stocks: | Consumer staples | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 14,792 | 12,036 |
Common stocks: | Energy | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 3,008 | 3,241 |
Common stocks: | Finance | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 20,890 | 22,636 |
Common stocks: | Industrial | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 11,501 | 9,452 |
Common stocks: | Information technology | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 3,599 | 2,284 |
Common stocks: | Materials | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 3,706 | 2,820 |
Common stocks: | Other | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 2,215 | 1,579 |
Preferred stocks: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 6,947 | 8,771 |
Preferred stocks: | Consumer staples | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 423 | 117 |
Preferred stocks: | Finance | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 4,746 | 7,085 |
Preferred stocks: | Industrial | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 1,067 | 1,020 |
Preferred stocks: | Other | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 711 | 549 |
Mutual funds: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 59,240 | 55,402 |
Mutual funds: | Fixed income | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 5,218 | 5,068 |
Mutual funds: | Equity | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 53,549 | 49,773 |
Mutual funds: | Commodity | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 473 | 561 |
Level 1 | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 44,483 | 48,541 |
Total fixed maturity securities, held-to-maturity | 0 | 0 |
Equity securities, at fair value | 120,914 | 111,398 |
Mortgage loans | 0 | 0 |
Short-term investments | 190,670 | 121,158 |
Total investments | 356,067 | 281,097 |
Level 1 | U.S. government securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 44,483 | 48,541 |
Level 1 | Corporate securities and miscellaneous | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Level 1 | Municipal securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Level 1 | Residential mortgage-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Level 1 | Commercial mortgage-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Level 1 | Asset-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Total fixed maturity securities, held-to-maturity | 0 | 0 |
Level 1 | Common stocks: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 61,674 | 55,996 |
Level 1 | Common stocks: | Consumer discretionary | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 1,963 | 1,948 |
Level 1 | Common stocks: | Consumer staples | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 14,792 | 12,036 |
Level 1 | Common stocks: | Energy | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 3,008 | 3,241 |
Level 1 | Common stocks: | Finance | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 20,890 | 22,636 |
Level 1 | Common stocks: | Industrial | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 11,501 | 9,452 |
Level 1 | Common stocks: | Information technology | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 3,599 | 2,284 |
Level 1 | Common stocks: | Materials | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 3,706 | 2,820 |
Level 1 | Common stocks: | Other | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 2,215 | 1,579 |
Level 1 | Preferred stocks: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 1 | Preferred stocks: | Consumer staples | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 1 | Preferred stocks: | Finance | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 1 | Preferred stocks: | Industrial | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 1 | Preferred stocks: | Other | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 1 | Mutual funds: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 59,240 | 55,402 |
Level 1 | Mutual funds: | Fixed income | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 5,218 | 5,068 |
Level 1 | Mutual funds: | Equity | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 53,549 | 49,773 |
Level 1 | Mutual funds: | Commodity | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 473 | 561 |
Level 2 | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 723,008 | 559,031 |
Total fixed maturity securities, held-to-maturity | 0 | 0 |
Equity securities, at fair value | 6,947 | 8,771 |
Mortgage loans | 0 | 0 |
Short-term investments | 0 | 0 |
Total investments | 729,955 | 567,802 |
Level 2 | U.S. government securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Level 2 | Corporate securities and miscellaneous | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 293,560 | 235,129 |
Level 2 | Municipal securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 70,973 | 57,727 |
Level 2 | Residential mortgage-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 196,946 | 119,856 |
Level 2 | Commercial mortgage-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 17,979 | 36,495 |
Level 2 | Asset-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 143,550 | 109,824 |
Total fixed maturity securities, held-to-maturity | 0 | 0 |
Level 2 | Common stocks: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Common stocks: | Consumer discretionary | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Common stocks: | Consumer staples | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Common stocks: | Energy | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Common stocks: | Finance | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Common stocks: | Industrial | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Common stocks: | Information technology | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Common stocks: | Materials | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Common stocks: | Other | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Preferred stocks: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 6,947 | 8,771 |
Level 2 | Preferred stocks: | Consumer staples | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 423 | 117 |
Level 2 | Preferred stocks: | Finance | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 4,746 | 7,085 |
Level 2 | Preferred stocks: | Industrial | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 1,067 | 1,020 |
Level 2 | Preferred stocks: | Other | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 711 | 549 |
Level 2 | Mutual funds: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Mutual funds: | Fixed income | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Mutual funds: | Equity | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 2 | Mutual funds: | Commodity | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Total fixed maturity securities, held-to-maturity | 42,587 | 46,771 |
Equity securities, at fair value | 0 | 0 |
Mortgage loans | 32,762 | 52,842 |
Short-term investments | 0 | 0 |
Total investments | 75,349 | 99,613 |
Level 3 | U.S. government securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Level 3 | Corporate securities and miscellaneous | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Level 3 | Municipal securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Level 3 | Residential mortgage-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Level 3 | Commercial mortgage-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Level 3 | Asset-backed securities | | |
Fixed maturity securities, available-for-sale: | | |
Total fixed maturity securities, available-for-sale | 0 | 0 |
Total fixed maturity securities, held-to-maturity | 42,587 | 46,771 |
Level 3 | Common stocks: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Common stocks: | Consumer discretionary | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Common stocks: | Consumer staples | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Common stocks: | Energy | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Common stocks: | Finance | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Common stocks: | Industrial | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Common stocks: | Information technology | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Common stocks: | Materials | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Common stocks: | Other | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Preferred stocks: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Preferred stocks: | Consumer staples | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Preferred stocks: | Finance | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Preferred stocks: | Industrial | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Preferred stocks: | Other | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Mutual funds: | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Mutual funds: | Fixed income | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Mutual funds: | Equity | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | 0 | 0 |
Level 3 | Mutual funds: | Commodity | | |
Fixed maturity securities, available-for-sale: | | |
Equity securities, at fair value | $ 0 | $ 0 |