Investments - Available-for-sale Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost
Due in one year or less	$ 3,725
Due after one year through five years	32,450
Due after five years through ten years	15,615
Due after ten years	10,303
Securities with contractual maturities	62,093
Total debt securities	125,257	$ 135,370
Estimated Fair Value
Due in one year or less	3,696
Due after one year through five years	30,977
Due after five years through ten years	13,670
Due after ten years	8,112
Securities with contractual maturities	56,455
Total debt securities	115,161	122,113
Asset-backed securities
Amortized Cost
Total debt securities	32,757	38,289
Estimated Fair Value
Total debt securities	32,678	37,752
Mortgage-backed securities
Amortized Cost
Total debt securities	25,178	26,768
Estimated Fair Value
Total debt securities	21,176	22,127
Commercial mortgage-backed securities
Amortized Cost
Total debt securities	2,284	3,404
Estimated Fair Value
Total debt securities	2,218	3,244
Collateralized mortgage obligations
Amortized Cost
Total debt securities	2,945	3,228
Estimated Fair Value
Total debt securities	$ 2,634	$ 2,784