Investments Components of Net Investment Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of net investment income
Interest on fixed maturity securities	$ 36,160	$ 37,727	$ 42,892
Dividends on equity securities	6,421	5,044	5,268
Equity in earnings of other invested assets	4,895	1,378	1,552
Interest on other assets	22	27	32
Total investment income	47,498	44,176	49,744
Investment expenses	3,363	3,131	3,079
Net investment income	$ 44,135	$ 41,045	$ 46,665