Investments - Portion of Net Unrealized Gains (Losses) Recognized During the Reporting Period (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Equity securities:
Net gains (losses) recognized during the period	$ 2,782	$ 244	$ 5,477	$ (3,060)
Less: net gains (losses) recognized on securities sold	146	91	883	(2,636)
Net unrealized gains (losses) recognized on securities held at reporting date	$ 2,636	$ 153	$ 4,594	$ (424)