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TAXATION - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Operating Loss Carryforwards [Line Items]      
Increase (decrease) in valuation allowance $ (66,200,000) $ 19,600,000 $ 62,100,000
Unrealized losses in the US investment portfolio 60,600,000    
Income taxes paid (refunded) 99,535,000 26,777,000 $ 3,129,000
Unrecognized tax benefits 0 0  
Interest and penalties accrued on unrecognized tax benefits $ 0 $ 0  
Bermuda      
Operating Loss Carryforwards [Line Items]      
Statutory income tax rate 0.00%    
U.S.      
Operating Loss Carryforwards [Line Items]      
Expected tax rate 5.00%    
Foreign statutory income tax rate 21.00%    
U.S. | 2037      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards $ 97,300,000    
U.S. | 2027      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards $ 131,600,000    
Ireland      
Operating Loss Carryforwards [Line Items]      
Foreign statutory income tax rate 12.50%    
Operating loss carryforwards $ 8,300,000    
U.K.      
Operating Loss Carryforwards [Line Items]      
Foreign statutory income tax rate 25.00%    
Operating loss carryforwards $ 141,200,000    
Singapore      
Operating Loss Carryforwards [Line Items]      
Foreign statutory income tax rate 17.00%    
Switzerland      
Operating Loss Carryforwards [Line Items]      
Foreign statutory income tax rate 19.70%    
Switzerland | 2024      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards $ 350,000,000.0    
Luxembourg      
Operating Loss Carryforwards [Line Items]      
Foreign statutory income tax rate 24.90%    
Operating loss carryforwards $ 155,700,000    
Canada      
Operating Loss Carryforwards [Line Items]      
Foreign statutory income tax rate 26.50%    
Australia      
Operating Loss Carryforwards [Line Items]      
Foreign statutory income tax rate 30.00%