Investments - Schedule of Net Gains and Losses on Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Equity Securities:
Net gains and losses recognized during the period on equity securities	$ (1,162)	$ 2,780
Less: Net gains realized during the period on equity securities	0	(2,981)
Unrealized net gains and losses recognized during the period on equity securities still held at the reporting date	$ (1,162)	$ (201)