v3.26.3
Investments - Additional Information (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2026
USD ($)
security
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Investments      
Accrued investment income $ 32,205   $ 30,026
Number of debt securities for which there is an allowance for credit losses | security 16    
Losses on fixed income securities $ 1,000    
Number of debt securities in an unrealized loss position for which an allowance for credit losses has not been recorded | security 1,726    
Unrealized loss $ 293,559   140,435
Unrealized losses as percentage of fixed income portfolio cost basis 8.00%    
Unrealized losses relative to total invested assets (as a percent) 6.00%    
Number of unrealized loss positions | security 1,726    
Number of securities in unrealized loss positions for 12 months or longer | security 716    
Maximum      
Investments      
Losses on fixed income securities   $ 1,000  
Fixed Income Securities      
Investments      
Accrued investment income $ 32,000   $ 29,000