Supplemental Disclosures of Cash Flow Information - Summary of Noncash Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract]
Stock-based compensation not involving cash	$ 35,650	$ 30,272	$ 35,892
Commitments for low-income housing interests	136,882	177,010	161,503
Exchanges of fixed maturity investments	147,612	109,226	219,807
Net unsettled security trades	0	6,963	1,669
Noncash tax credits	$ 1,000	$ 1,883	$ 0