Investments - Net Investment Losses (Gains) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Gross realized gains
Fixed maturity securities, available-for sale	$ 493	$ 16
Equity securities	1,227	1,830
Other	1	31
Total	1,721	1,877
Gross realized losses
Fixed maturity securities, available-for sale	(237)	(276)
Equity securities	(4,289)	(654)
Other	(1)	(16)
Total	(4,527)	(946)
Net unrealized gains (losses) on investments
Equity securities	3,745	(5,369)
Mortgage loans	22	0
Net investment gains (losses)	$ 961	$ (4,438)