Market Risk Benefits - Market Risk Benefits In Asset and Liability Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023		Dec. 31, 2022	Dec. 31, 2021
Liability for Future Policy Benefit, Activity [Line Items]
Total market risk benefit assets	$ 2,637,363	$ 2,367,243
Total market risk benefit liabilities	4,281,244	5,156,858	[1]
Variable Annuties
Liability for Future Policy Benefit, Activity [Line Items]
Net amount at risk	$ 8,722,499	$ 9,041,651		$ 12,141,947
Weighted-average attained age of contractholders	71 years	70 years		68 years
Direct and assumed	$ 1,492,186	$ 1,201,945		$ 850,060
Ceded	1,145,177	1,165,298		543,177
Total market risk benefit assets	2,637,363	2,367,243		1,393,237
Direct and assumed(1)	3,980,650	4,909,352		5,400,685
Ceded	300,594	247,506		120,916
Total market risk benefit liabilities	4,281,244	5,156,858		5,521,601
Net liability		3,707,407		4,550,625	$ 8,884,362
Total, Net of Reinsurance
Liability for Future Policy Benefit, Activity [Line Items]
Net liability	$ 1,643,881	$ 2,789,615		$ 4,128,364	$ 7,977,878

[1] Amounts reflect revision to prior period Financial Statements. See Note 17 for additional information.