v3.26.1
Investments (Summary Of Net Investment Gains (Losses) And The Change In Net Unrealized Gains On Investments) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Gain (Loss) on Securities [Line Items]        
Net realized investment losses $ (2,933) $ (16,596) $ (890) $ (18,397)
Change in fair value of securities sold during the period 40,142 1,134 18,241 (188)
Change in fair value of securities held at the end of the period 1,130,316 595,685 422,612 449,737
Total change in fair value of equity securities 1,170,458 596,819 440,853 449,549
Net investment gains (losses) 1,167,525 580,223 439,963 431,152
Change in net unrealized losses on available-for-sale investments included in other comprehensive income (loss): (75,270) 258,329 (245,821) 535,556
Fixed Maturity Securities [Member]        
Gain (Loss) on Securities [Line Items]        
Change in net unrealized losses on available-for-sale investments included in other comprehensive income (loss): (72,465) 251,805 (238,069) 525,018
Short-term investments [Member]        
Gain (Loss) on Securities [Line Items]        
Change in net unrealized losses on available-for-sale investments included in other comprehensive income (loss): $ (2,805) $ 6,524 $ (7,752) $ 10,538