v3.25.2
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, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Gain (Loss) on Securities [Line Items]        
Net realized investment losses $ (16,596) $ (14,007) $ (18,397) $ (18,495)
Change in fair value of securities sold during the period 1,134 (4,654) (188) (4,611)
Change in fair value of securities held at the end of the period 595,685 (111,356) 449,737 795,370
Total change in fair value of equity securities 596,819 (116,010) 449,549 790,759
Net investment gains (losses) 580,223 (130,017) 431,152 772,264
Change in net unrealized losses on available-for-sale investments included in other comprehensive income (loss): 258,329 (36,598) 535,556 (192,367)
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): 251,805 (36,240) 525,018 (184,727)
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): $ 6,524 $ (358) $ 10,538 $ (7,640)