Investments - Schedule of Contractual Maturities of the Company's Available-for-Sale Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Amortized Cost
Due in one year or less	$ 73,564
Due after one year through five years	304,782
Due after five years through ten years	103,650
Due after ten years	367
Mortgage-backed and asset-backed securities	188,559
Total fixed maturity securities	670,922	$ 687,813
Estimated Fair Value
Due in one year or less	73,861
Due after one year through five years	305,173
Due after five years through ten years	103,615
Due after ten years	363
Mortgage-backed and asset-backed securities	190,088
Total fixed maturity securities	$ 673,100	$ 696,271