Investments - Disposition of Fixed Income and Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Summary of the disposition of fixed income and equity securities
Fixed income securities, available-for-sale	$ 62,748	$ 10,207
Fixed income securities, available-for-sale	118,529	99,651
Net Realized Gain (Loss) - Fixed income securities - available-for-sale	(1,000)	0
SALES
Summary of the disposition of fixed income and equity securities
Fixed income securities, available-for-sale	64,810	10,473
Gross Realized Gains - Fixed income securities - available-for-sale	1,022	62
Gross Realized Losses - Fixed income securities - available-for-sale	(1,466)	(205)
Net Realized Gain (Loss) - Fixed income securities - available-for-sale	(444)	(143)
Proceeds from Sales - Equity securities	18,205	26,679
Gross Realized Gains - Equity securities	10,355	15,140
Gross Realized Losses - Equity securities	(102)	(62)
Net Realized Gain (Loss) - Equity securities	10,253	15,078
Calls And Maturities Of Marketable Securities
Summary of the disposition of fixed income and equity securities
Fixed income securities, available-for-sale	118,547	101,454
Gross Realized Gains - Fixed income securities - available-for-sale	385	9
Gross Realized Losses - Fixed income securities - available-for-sale		(71)
Net Realized Gain (Loss) - Fixed income securities - available-for-sale	$ 385	$ (62)