Investments - Available-for-sale Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Amortized Cost
Due in one year or less	$ 3,444
Due after one year through five years	30,690
Due after five years through ten years	20,645
Due after ten years	11,145
Securities with contractual maturities	65,924
Total debt securities	121,367	$ 127,119
Estimated Fair Value
Due in one year or less	3,389
Due after one year through five years	28,173
Due after five years through ten years	17,160
Due after ten years	8,538
Securities with contractual maturities	57,260
Total debt securities	105,996	110,201
Asset-backed securities
Amortized Cost
Total debt securities	20,550	21,742
Estimated Fair Value
Total debt securities	19,523	20,496
Mortgage-backed securities
Amortized Cost
Total debt securities	27,879	29,194
Estimated Fair Value
Total debt securities	22,885	24,037
Commercial mortgage-backed securities
Amortized Cost
Total debt securities	3,410	3,414
Estimated Fair Value
Total debt securities	3,259	3,228
Collateralized mortgage obligations
Amortized Cost
Total debt securities	3,604	4,102
Estimated Fair Value
Total debt securities	$ 3,069	$ 3,567