Investments - Unrealized Gains (Losses) Related to Equity Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Net gains (losses) recognized during the period	$ 14,372	$ (23,855)
Less: net gains recognized during the period on equity securities sold during the period	6,132	17,960
Unrealized gains (losses) recognized during the period on equity securities held	$ 8,240	$ (41,815)