Summary of Investments - Net Investment Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Other	$ 4,139	$ 780	$ 152
Total investment income	69,084	54,448	64,852
Less investment expenses	9,478	9,516	9,074
Net investment income	59,606	44,932	55,778
Total fixed maturities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income:	56,243	48,702	43,224
Equity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Dividends on equity securities	3,548	5,163	5,031
Other long-term investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income:	2,833	4,742	4,481
Other long-term investments | Change in Value
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Other	(2,864)	(7,930)	9,699
Mortgage-backed securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income:	1,889	1,897	1,995
Short-term investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income:	1,068	354	18
Cash and cash equivalents
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income:	$ 2,228	$ 740	$ 252