Investments - Components of Net Investment Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Components of net investment income
Interest on fixed maturity securities	$ 55,620	$ 47,219	$ 46,609
Dividends on equity securities	6,725	6,959	7,298
Equity in earnings of other invested assets	4,025	4,654	5,521
Interest on other assets	307	339	219
Total investment income	66,677	59,171	59,647
Investment expenses	3,945	3,451	3,270
Net investment income	$ 62,732	$ 55,720	$ 56,377