FIXED MATURITY INVESTMENTS - Schedule of Fair Value Of Fixed Maturity Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Net Investment Income [Line Items]
Total fixed maturity securities	$ 96,198	$ 53,028
Liquidity funds	54,704	12,581
Total fixed maturity investments, at fair value	150,902	65,609
U.S. government and agencies
Net Investment Income [Line Items]
Total fixed maturity securities	26,252	17,979
Agency residential mortgage-backed securities ("RMBS")
Net Investment Income [Line Items]
Total fixed maturity securities	25,197	18,258
Corporate bonds
Net Investment Income [Line Items]
Total fixed maturity securities	38,664	9,769
Asset-back securities ("ABS")
Net Investment Income [Line Items]
Total fixed maturity securities	6,085	5,565
Non-agency RMBS
Net Investment Income [Line Items]
Total fixed maturity securities	0	600
Municipal bonds
Net Investment Income [Line Items]
Total fixed maturity securities	$ 0	$ 857

Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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