Supplemental Disclosures of Cash Flow Information - Summary of Noncash Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Stock-based compensation not involving cash	$ 30,736	$ 35,650	$ 30,272
Commitments for low-income housing interests	0	136,882	177,010
Exchanges of fixed maturity investments	50,936	147,612	109,226
Net unsettled security trades	3,833	0	6,963
Noncash tax credits	$ 1,083	$ 1,000	$ 1,883