v3.26.1
Investments - Schedule of Analysis of Investment Operations (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Net Investment Income [Line Items]    
Investment income, gross $ 296,635 $ 287,091
Less investment expense (6,811) (6,477)
Net investment income $ 289,824 280,614
Percentage change in investment income, gross 3.00%  
Percentage change in investment expense 5.00%  
Percentage change in net investment income 3.00%  
Fixed maturities available for sale    
Net Investment Income [Line Items]    
Investment income, gross $ 245,819 242,210
Percentage change in investment income, gross 1.00%  
Policy loans    
Net Investment Income [Line Items]    
Investment income, gross $ 14,281 13,658
Percentage change in investment income, gross 5.00%  
Mortgage loans    
Net Investment Income [Line Items]    
Investment income, gross $ 7,586 6,668
Percentage change in investment income, gross 14.00%  
Other long-term investments    
Net Investment Income [Line Items]    
Investment income, gross $ 26,080 23,079
Percentage change in investment income, gross 13.00%  
Short-term investments    
Net Investment Income [Line Items]    
Investment income, gross $ 2,869 1,476
Percentage change in investment income, gross  
Fair value option    
Net Investment Income [Line Items]    
Net investment income $ 21,300 $ 19,200