Investments - Changes in Balance of Level 3 Securities (Details) - Regulation D Private Placement Fixed Income Securities $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)
Summary of changes in Level 3 securities
Beginning balance	$ 62,096
Included in other comprehensive earnings (loss)	1,075
Purchases	34,859
Sales	(2,905)
Ending balance	95,125
Change in unrealized gains (losses) during the period for Level 3 assets held at period-end - OCI	$ 1,075
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Other Comprehensive Income	Other comprehensive earnings (loss), net of tax