v3.26.3
DEBT AND CREDIT FACILITIES - Schedule of Debt Obligations (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Fair Value    
Debt Instrument [Line Items]    
Long-term debt $ 2,277,091 $ 2,409,992
Carrying Value    
Debt Instrument [Line Items]    
Long-term debt $ 2,331,768 2,329,201
7.003% Senior Notes due 2035 (Fontana) | Senior Notes | Fontana    
Debt Instrument [Line Items]    
Stated interest rate 7.003%  
7.003% Senior Notes due 2035 (Fontana) | Senior Notes | Fontana | Fair Value    
Debt Instrument [Line Items]    
Long-term debt $ 92,790 100,165
7.003% Senior Notes due 2035 (Fontana) | Senior Notes | Fontana | Carrying Value    
Debt Instrument [Line Items]    
Long-term debt $ 99,283 99,224
5.950% Senior Notes due 2035 (DaVinci) | Senior Notes | DaVinciRe Holdings Ltd.    
Debt Instrument [Line Items]    
Stated interest rate 5.95%  
5.950% Senior Notes due 2035 (DaVinci) | Senior Notes | DaVinciRe Holdings Ltd. | Fair Value    
Debt Instrument [Line Items]    
Long-term debt $ 292,560 310,182
5.950% Senior Notes due 2035 (DaVinci) | Senior Notes | DaVinciRe Holdings Ltd. | Carrying Value    
Debt Instrument [Line Items]    
Long-term debt $ 297,216 296,972
5.800% Senior Notes due 2035 | Senior Notes    
Debt Instrument [Line Items]    
Stated interest rate 5.80%  
5.800% Senior Notes due 2035 | Senior Notes | Fair Value    
Debt Instrument [Line Items]    
Long-term debt $ 481,350 523,945
5.800% Senior Notes due 2035 | Senior Notes | Carrying Value    
Debt Instrument [Line Items]    
Long-term debt $ 494,274 493,770
5.750% Senior Notes due 2033 | Senior Notes    
Debt Instrument [Line Items]    
Stated interest rate 5.75%  
5.750% Senior Notes due 2033 | Senior Notes | Fair Value    
Debt Instrument [Line Items]    
Long-term debt $ 731,325 786,518
5.750% Senior Notes due 2033 | Senior Notes | Carrying Value    
Debt Instrument [Line Items]    
Long-term debt $ 743,713 743,009
3.600% Senior Notes due 2029 | Senior Notes    
Debt Instrument [Line Items]    
Stated interest rate 3.60%  
3.600% Senior Notes due 2029 | Senior Notes | Fair Value    
Debt Instrument [Line Items]    
Long-term debt $ 381,760 391,708
3.600% Senior Notes due 2029 | Senior Notes | Carrying Value    
Debt Instrument [Line Items]    
Long-term debt $ 397,652 396,966
3.450% Senior Notes due 2027 | Senior Notes | RenaissanceRe Finance, Inc.    
Debt Instrument [Line Items]    
Stated interest rate 3.45%  
3.450% Senior Notes due 2027 | Senior Notes | RenaissanceRe Finance, Inc. | Fair Value    
Debt Instrument [Line Items]    
Long-term debt $ 297,306 297,474
3.450% Senior Notes due 2027 | Senior Notes | RenaissanceRe Finance, Inc. | Carrying Value    
Debt Instrument [Line Items]    
Long-term debt $ 299,630 $ 299,260