v3.25.4
DEBT AND CREDIT FACILITIES - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Nov. 03, 2025
May 01, 2025
Apr. 01, 2025
Mar. 05, 2025
Feb. 25, 2025
Dec. 31, 2024
Jun. 05, 2023
Apr. 02, 2019
Jun. 29, 2017
May 04, 2015
Mar. 24, 2015
Fair Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 2,409,992           $ 1,871,492          
Carrying Value                        
Debt Instrument [Line Items]                        
Long-term debt 2,329,201           1,886,689          
Senior Notes | Fair Value                        
Debt Instrument [Line Items]                        
Long-term debt 2,409,992           1,871,492          
Senior Notes | Carrying Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 2,329,201           1,886,689          
Senior Notes | 5.800% Senior Notes due 2035                        
Debt Instrument [Line Items]                        
Interest rate 5.80%         5.80%            
Senior Notes | 5.800% Senior Notes due 2035 | Fair Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 523,945           0          
Senior Notes | 5.800% Senior Notes due 2035 | Carrying Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 493,770           0          
Senior Notes | 5.750% Senior Notes due 2033                        
Debt Instrument [Line Items]                        
Interest rate 5.75%             5.75%        
Senior Notes | 5.750% Senior Notes due 2033 | Fair Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 786,518           755,693          
Senior Notes | 5.750% Senior Notes due 2033 | Carrying Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 743,009           742,068          
Senior Notes | 3.600% Senior Notes due 2029                        
Debt Instrument [Line Items]                        
Interest rate 3.60%               3.60%      
Senior Notes | 3.600% Senior Notes due 2029 | Fair Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 391,708           376,816          
Senior Notes | 3.600% Senior Notes due 2029 | Carrying Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 396,966           396,051          
Senior Notes | Fontana | 7.003% Senior Notes due 2035 (Fontana)                        
Debt Instrument [Line Items]                        
Interest rate 7.003% 7.003%                    
Senior Notes | Fontana | 7.003% Senior Notes due 2035 (Fontana) | Fair Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 100,165           0          
Senior Notes | Fontana | 7.003% Senior Notes due 2035 (Fontana) | Carrying Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 99,224           0          
Senior Notes | DaVinci | 5.950% Senior Notes due 2035 (DaVinci)                        
Debt Instrument [Line Items]                        
Interest rate 5.95%       5.95%              
Senior Notes | DaVinci | 5.950% Senior Notes due 2035 (DaVinci) | Fair Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 310,182           0          
Senior Notes | DaVinci | 5.950% Senior Notes due 2035 (DaVinci) | Carrying Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 296,972           0          
Senior Notes | DaVinci | 4.750% Senior Notes due 2025 (DaVinci)                        
Debt Instrument [Line Items]                        
Interest rate 4.75%   4.75%   4.75%           4.75%  
Senior Notes | DaVinci | 4.750% Senior Notes due 2025 (DaVinci) | Fair Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 0           149,363          
Senior Notes | DaVinci | 4.750% Senior Notes due 2025 (DaVinci) | Carrying Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 0           149,897          
Senior Notes | RenaissanceRe Finance, Inc. | 3.450% Senior Notes due 2027                        
Debt Instrument [Line Items]                        
Interest rate 3.45%                 3.45%    
Senior Notes | RenaissanceRe Finance, Inc. | 3.450% Senior Notes due 2027 | Fair Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 297,474           290,070          
Senior Notes | RenaissanceRe Finance, Inc. | 3.450% Senior Notes due 2027 | Carrying Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 299,260           298,765          
Senior Notes | RenaissanceRe Finance, Inc. | 3.700% Senior Notes due 2025                        
Debt Instrument [Line Items]                        
Interest rate 3.70%     3.70%               3.70%
Senior Notes | RenaissanceRe Finance, Inc. | 3.700% Senior Notes due 2025 | Fair Value                        
Debt Instrument [Line Items]                        
Long-term debt $ 0           299,550          
Senior Notes | RenaissanceRe Finance, Inc. | 3.700% Senior Notes due 2025 | Carrying Value                        
Debt Instrument [Line Items]                        
Long-term debt 0           299,908          
Line of Credit | Medici | Fair Value | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Long-term debt 0           0          
Line of Credit | Medici | Carrying Value | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Long-term debt $ 0           $ 0