Investments - Disposition of Fixed Income and Equity Securities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Summary of the disposition of fixed income and equity securities
Fixed income securities - available-for-sale	$ 41,543	$ 19,490
Fixed income securities - available-for-sale	159,869	349,714
Net Realized Gain (Loss) - Fixed income securities - available-for-sale	0	(2,000)
SALES
Summary of the disposition of fixed income and equity securities
Fixed income securities - available-for-sale	41,543	20,729
Gross Realized Gains - Fixed income securities - available-for-sale	357	99
Gross Realized Losses - Fixed income securities - available-for-sale	(1,139)	(910)
Net Realized Gain (Loss) - Fixed income securities - available-for-sale	(782)	(811)
Proceeds from Sales - Equity securities	31,473	22,029
Gross Realized Gains - Equity securities	13,344	8,841
Gross Realized Losses - Equity securities	(340)	(101)
Net Realized Gain (Loss) - Equity securities	13,004	8,740
Calls And Maturities Of Marketable Securities
Summary of the disposition of fixed income and equity securities
Fixed income securities - available-for-sale	158,472	349,734
Gross Realized Gains - Fixed income securities - available-for-sale	79	37
Gross Realized Losses - Fixed income securities - available-for-sale	(856)	(43)
Net Realized Gain (Loss) - Fixed income securities - available-for-sale	$ (777)	$ (6)