Closed Block - Schedule of Amortized Cost and Fair Value of Closed Block Fixed Maturity Portfolio by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Closed Block Disclosure [Abstract]
Amortized Cost, Due in one year or less	$ 3,704
Amortized Cost, Due after one year through five years	3,922
Amortized Cost, Due after five years through ten years	6,825
Amortized Cost, Due after ten years	24,865
Amortized Cost, Securities not due at a single maturity date - primarily mortgage and asset-backed	3,098
Amortized Cost, Total fixed maturities	42,414	$ 42,506
Fair Value, Due in one year or less	3,647
Fair Value, Due after one year through five years	3,913
Fair Value, Due after five years through ten years	6,473
Fair Value, Due after ten years	22,018
Fair Value, Securities not due at a single maturity date - primarily mortgage and asset-backed	3,017
Fair Value, Total fixed maturities	$ 39,068	$ 39,678