Supplemental Disclosures of Cash Flow Information - Schedule of Noncash Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Supplemental Cash Flow Elements [Abstract]
Stock-based compensation not involving cash	$ 53,355	$ 40,118	$ 30,736
Commitments for low-income housing interests	234,753	35,000	0
Exchanges of fixed maturity investments	288,491	105,595	50,936
Net unsettled security trades	408	2,334	3,833
Noncash tax credits	$ 0	$ 0	$ 1,083