v3.26.1
SUBSEQUENT EVENTS (Details)
1 Months Ended 3 Months Ended
May 01, 2026
Apr. 29, 2026
GBP (£)
Apr. 30, 2026
USD ($)
$ / shares
shares
Mar. 31, 2026
USD ($)
shares
Mar. 31, 2025
USD ($)
shares
Apr. 28, 2026
USD ($)
Apr. 28, 2026
GBP (£)
Apr. 01, 2026
USD ($)
Mar. 31, 2026
GBP (£)
May 02, 2025
USD ($)
Subsequent Event [Line Items]                    
Repurchase of shares (in shares) | shares       298,701 0          
Payments for repurchase       $ 4,989,000 $ 0          
Stock repurchase program, authorized amount                   $ 25,000,000
Investment Advisory Agreement | Board of Directors Chairman                    
Subsequent Event [Line Items]                    
Investment management fee rate - monthly (in percent)       0.125%            
Investment management fee rate - annual (in percent)       1.50%            
Subsequent Event                    
Subsequent Event [Line Items]                    
Repurchase of shares (in shares) | shares     518,454              
Payments for repurchase     $ 9,500,000              
Average price (in dollars per share) | $ / shares     $ 18.38              
Stock repurchase program, authorized amount           $ 40,000,000.0        
Subsequent Event | Investment Advisory Agreement | Board of Directors Chairman                    
Subsequent Event [Line Items]                    
Investment management fee rate - monthly (in percent) 0.104%                  
Investment management fee rate - annual (in percent) 1.25%                  
Financial Standby Letter of Credit                    
Subsequent Event [Line Items]                    
Capacity       $ 575,000,000            
LCs issued       349,357,000            
Financial Standby Letter of Credit | CIBC                    
Subsequent Event [Line Items]                    
Capacity       200,000,000            
LCs issued       $ 190,296,000            
Financial Standby Letter of Credit | CIBC | Subsequent Event                    
Subsequent Event [Line Items]                    
Capacity               $ 300,000,000    
Financial Standby Letter of Credit | CIBC | Greenlight Re | Subsequent Event                    
Subsequent Event [Line Items]                    
Capacity               250,000,000    
Financial Standby Letter of Credit | CIBC | GRIL | Subsequent Event                    
Subsequent Event [Line Items]                    
Capacity               $ 50,000,000    
Financial Standby Letter of Credit | Citibank FAL                    
Subsequent Event [Line Items]                    
Capacity | £                 £ 50,000,000  
LCs issued | £                 £ 45,000,000  
Financial Standby Letter of Credit | Citibank FAL | Subsequent Event                    
Subsequent Event [Line Items]                    
Capacity | £   £ 60,000,000         £ 50,000,000      
Proceeds from lines of credit | £   13,000,000                
LCs issued | £   £ 58,000,000