Investments - Schedule of Realized Gains (Losses) on Investments (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Sales and other	$ 788,000	$ 140,000
Provision for credit losses	40,000	88,000
Fair value option—change in fair value	2,371,000	(15,403,000)
Mortgage loans	433,000	(874,000)
Other investments	(1,078,000)	314,000
Realized gains (losses) from investments	2,554,000	(15,735,000)
Other gains (losses)	(2,469,000)	3,936,000
Total realized gains (losses)	85,000	(11,799,000)
Applicable tax	(18,000)	2,478,000
Realized gains (losses), net of tax	67,000	(9,321,000)
Exchanges of fixed maturities	55,700,000	66,900,000
Exchanges of fixed maturities, net realized gains	$ 0	$ 0