v3.26.1
Investments - Gross Unrealized Losses (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
security
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
security
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Marketable Securities            
Fixed maturity securities, Cost or Amortized Cost $ 1,365,368   $ 1,337,235      
Fixed maturity securities, Allowance for Expected Credit Losses (355)   0      
Fixed maturity securities, Gross Unrealized Gains 6,324   14,135      
Fixed maturity securities, Gross Unrealized Losses (42,743)   (35,822)      
Fixed maturity securities, Estimated Fair Value 1,328,594   1,315,548      
Equity securities, Cost or Amortized Cost 189,372   201,591      
Equity securities, Estimated Fair Value 201,956   220,953      
Other invested assets 154,036   151,020      
Cost or Amortized Cost 1,708,776   1,689,846      
Gross Unrealized Gains 31,854   41,462      
Gross Unrealized Losses (55,689)   (43,787)      
Estimated Fair Value $ 1,684,586   $ 1,687,521      
Number of securities in an unrealized loss position | security 833   700      
U.S. Treasury securities            
Marketable Securities            
Fixed maturity securities, Cost or Amortized Cost $ 4,209   $ 4,211      
Fixed maturity securities, Gross Unrealized Gains 4   22      
Fixed maturity securities, Gross Unrealized Losses (46)   (28)      
Fixed maturity securities, Estimated Fair Value 4,167   4,205      
Obligations of states and political subdivisions            
Marketable Securities            
Fixed maturity securities, Cost or Amortized Cost 38,814   38,837      
Fixed maturity securities, Gross Unrealized Gains 287   532      
Fixed maturity securities, Gross Unrealized Losses (1,820)   (1,651)      
Fixed maturity securities, Estimated Fair Value 37,281   37,718      
Residential mortgage-backed securities            
Marketable Securities            
Fixed maturity securities, Cost or Amortized Cost 372,628   376,354      
Fixed maturity securities, Gross Unrealized Gains 2,641   5,075      
Fixed maturity securities, Gross Unrealized Losses (17,622)   (15,382)      
Fixed maturity securities, Estimated Fair Value 357,647   366,047      
Commercial mortgage-backed securities            
Marketable Securities            
Fixed maturity securities, Cost or Amortized Cost 157,196   162,755      
Fixed maturity securities, Gross Unrealized Gains 255   702      
Fixed maturity securities, Gross Unrealized Losses (7,072)   (6,439)      
Fixed maturity securities, Estimated Fair Value 150,379   157,018      
Other asset-backed securities            
Marketable Securities            
Fixed maturity securities, Cost or Amortized Cost 190,732   170,332      
Fixed maturity securities, Gross Unrealized Gains 315   373      
Fixed maturity securities, Gross Unrealized Losses (1,318)   (1,196)      
Fixed maturity securities, Estimated Fair Value 189,729   169,509      
Corporate and other securities            
Marketable Securities            
Fixed maturity securities, Cost or Amortized Cost 601,789   584,746      
Fixed maturity securities, Allowance for Expected Credit Losses (355) $ (348)   $ (1,453) $ (1,519) $ (1,198)
Fixed maturity securities, Gross Unrealized Gains 2,822   7,431      
Fixed maturity securities, Gross Unrealized Losses (14,865)   (11,126)      
Fixed maturity securities, Estimated Fair Value 589,391   581,051      
Equity securities            
Marketable Securities            
Equity securities, Cost or Amortized Cost 189,372   201,591      
Equity securities, Gross Unrealized Gains 25,530   27,327      
Equity securities, Gross Unrealized Losses (12,946)   (7,965)      
Equity securities, Estimated Fair Value 201,956   220,953      
Other invested assets            
Marketable Securities            
Other invested assets 154,036   151,020      
Other invested assets, Estimated Fair Value $ 154,036   $ 151,020