Reinsurance - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effects of Reinsurance [Line Items]
Reinsurance, excess loss coverage threshold	$ 0.4	$ 0.6	$ 0.6
Coinsurance percentage	100.00%
Life insurance reserves, fully coinsured by third party	$ 5.1	5.4
Life insurance reserves, coinsurance percentage	100.00%
Annuity reserve, fully ceded to third party	$ 0.9	$ 0.9
Annuity reserves, transfer of risk percentage	100.00%
Minimum
Effects of Reinsurance [Line Items]
Life insurance reserves assumption, interest rate (as percent)	1.00%
Annuity reserves assumption, interest rate (as percent)	1.00%
Maximum
Effects of Reinsurance [Line Items]
Life insurance reserves assumption, interest rate (as percent)	4.50%
Annuity reserves assumption, interest rate (as percent)	5.80%