v3.26.1
Investments in Equity Securities (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Equity securities $ 1,502,237 $ 1,358,201
Fair Value    
Debt Securities, Available-for-sale [Line Items]    
Cost 1,166,590 1,000,049
Gross Unrealized, Gains 349,524 369,011
Gross Unrealized, Losses (13,877) (10,859)
Equity securities 1,502,237 1,358,201
Fair Value | Common stock    
Debt Securities, Available-for-sale [Line Items]    
Cost 641,956 566,577
Gross Unrealized, Gains 251,133 181,120
Gross Unrealized, Losses (9,149) (5,584)
Equity securities 883,940 742,113
Fair Value | Preferred stocks    
Debt Securities, Available-for-sale [Line Items]    
Cost 524,634 433,472
Gross Unrealized, Gains 98,391 187,891
Gross Unrealized, Losses (4,728) (5,275)
Equity securities 618,297 616,088
Carrying Value    
Debt Securities, Available-for-sale [Line Items]    
Equity securities 1,502,237 1,358,201
Carrying Value | Common stock    
Debt Securities, Available-for-sale [Line Items]    
Equity securities 883,940 742,113
Carrying Value | Preferred stocks    
Debt Securities, Available-for-sale [Line Items]    
Equity securities $ 618,297 $ 616,088