Investments - Changes in Balance of Level 3 Securities (Details) - Significant Unobservable Inputs (Level 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Summary of changes in Level 3 securities
Beginning balance	$ 118,561	$ 95,125
Included in other comprehensive earnings (loss)	(1,546)	893
Purchases	15,296	5,070
Sales / Calls / Maturities	(330)	(2,143)
Ending balance	131,981	98,945
Change in unrealized gains (losses) during the period for Level 3 assets held at period-end - OCI	$ (1,550)	$ 893