v3.26.1
Operating Segment Information - Segment earnings before income taxes to earnings before income taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Reconciliation of earnings before income taxes        
Net investment income $ 46,042 $ 39,418 $ 88,363 $ 76,144
Net realized gains 9,407 15,004 18,966 29,916
Net unrealized gains (losses) on equity securities 103,024 43,500 63,628 1,182
Interest expense on debt (4,441) (1,350) (6,794) (2,685)
General corporate expense (6,223) (4,754) (8,947) (7,702)
Equity in earnings of unconsolidated investees 2,970 2,467 5,117 5,515
Earnings before income taxes 210,688 156,515 278,029 235,146
Operating Segments        
Reconciliation of earnings before income taxes        
Net investment income 46,042 39,418 88,363 76,144
Net realized gains 9,407 15,004 18,966 29,916
Net unrealized gains (losses) on equity securities 103,024 43,500 63,628 1,182
Earnings before income taxes 59,909 62,230 117,696 132,776
Corporate        
Reconciliation of earnings before income taxes        
Net investment income 46,042 39,418 88,363 76,144
Net realized gains 9,407 15,004 18,966 29,916
Net unrealized gains (losses) on equity securities 103,024 43,500 63,628 1,182
Interest expense on debt (4,441) (1,350) (6,794) (2,685)
General corporate expense (6,223) (4,754) (8,947) (7,702)
Equity in earnings of unconsolidated investees $ 2,970 $ 2,467 $ 5,117 $ 5,515