Investments - Schedule of Fixed Maturities, Allowance for Credit Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses beginning balance	$ 0
Allowance for credit losses ending balance	7,115	$ 0
Corporates
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses beginning balance	0	387
Additions to allowance for which credit losses were not previously recorded	72,508	0
Additions (reductions) to allowance for fixed maturities that previously had an allowance	(65,393)	0
Reduction of allowance for which the Company intends to sell or more likely than not will be required to sell or sold during the period	0	(387)
Allowance for credit losses ending balance	7,115	0
Corporates | Fixed maturities available for sale
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses beginning balance	0
Allowance for credit losses ending balance	$ 7,115	$ 0