Investments - Net Gains (Losses) On Investments and Other Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Fixed income securities:
Gross realized gains on sales of fixed income securities	$ 575	$ 425	$ 924	$ 480
Gross realized losses on sales of fixed income securities	(2,520)	(1,262)	(2,549)	(6,747)
Equity securities gains (losses):
Equity securities, gains (losses), market adjustment	89	(92)	209	(195)
Change in embedded derivative on Home Re Transactions(1)	430	646	731	(2,330)
Other:
Other, gains (losses) on sales	0	16	0	17
Other, market adjustment	0	(9)	0	(10)
Net gains (losses) on investments and other financial instruments	(1,426)	(276)	(685)	(8,785)
Proceeds from sales of fixed income securities	$ 20,280	$ 0	$ 41,017	$ 14,886