Summary of Investments - Net Investment Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Other	$ 780	$ 152	$ 205
Total investment income	54,448	64,852	48,127
Less investment expenses	9,516	9,074	8,457
Net investment income	44,932	55,778	39,670
Total fixed maturities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income:	48,702	43,224	46,478
Equity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Dividends on equity securities	5,163	5,031	6,368
Other long-term investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income:	4,742	4,481	1,890
Other long-term investments | Change in Value
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Other	(7,930)	9,699	(9,633)
Mortgage-backed securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income:	1,897	1,995	1,949
Short-term investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income:	354	18	107
Cash and cash equivalents
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income:	$ 740	$ 252	$ 763