Investments - Available-for-sale Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Amortized Cost
Due in one year or less	$ 4,722
Due after one year through five years	30,953
Due after five years through ten years	17,183
Due after ten years	10,670
Securities with contractual maturities	63,528
Total debt securities	132,889	$ 135,370
Estimated Fair Value
Due in one year or less	4,661
Due after one year through five years	28,823
Due after five years through ten years	14,379
Due after ten years	8,062
Securities with contractual maturities	55,925
Total debt securities	119,371	122,113
Asset-backed securities
Amortized Cost
Total debt securities	37,223	38,289
Estimated Fair Value
Total debt securities	37,002	37,752
Mortgage-backed securities
Amortized Cost
Total debt securities	25,790	26,768
Estimated Fair Value
Total debt securities	20,628	22,127
Commercial mortgage-backed securities
Amortized Cost
Total debt securities	3,301	3,404
Estimated Fair Value
Total debt securities	3,196	3,244
Collateralized mortgage obligations
Amortized Cost
Total debt securities	3,047	3,228
Estimated Fair Value
Total debt securities	$ 2,620	$ 2,784