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FAIR VALUE MEASUREMENTS - NARRATIVE (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Fair Value Disclosures [Abstract]    
Fair value of level 3 fixed maturity securities and trading securities valued using broker quotes, percentage 95.00%  
Residual tranches amount $ 99.2 $ 92.7
Unfunded commitments $ 25.4  
Available for sale fixed maturities classified as level 3, investment grade, percent 81.00%  
Available for sale fixed maturities classified as Level 3 and corporate securities 80.00%