Investments - Portion of Net Unrealized Gains (Losses) Recognized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Equity securities:
Net gains (losses) recognized during the period	$ 871	$ (13,238)	$ (186)
Less: net losses recognized on securities sold	(2,328)	(1,866)	(76)
Net unrealized gains (losses) recognized on securities held at reporting date	$ 3,199	$ (11,372)	$ (110)