Future Policy Benefits - Schedule of Amount of Revenue and Interest Recognized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Liability for Future Policy Benefit, after Reinsurance [Abstract]
Gross premiums	$ 3,292,760	$ 3,209,088	$ 3,099,828
Interest accretion (expense)	$ (311,921)	$ (309,581)	$ (327,378)