Loss And Loss Adjustment Expense Reserves (Narrative) (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Unusual or Infrequent Item, or Both [Line Items] | ||
| Prior years | $ (9,095) | $ (51,034) |
| Liability for catastrophe claims, carrying amount | 93,000 | 447,000 |
| Amount remaining to be billed to reinsurers | 14,000 | |
| Catastrophe | ||
| Unusual or Infrequent Item, or Both [Line Items] | ||
| Adjustments for prior year claims | 57,000 | $ (12,000) |
| Fire | ||
| Unusual or Infrequent Item, or Both [Line Items] | ||
| Amount paid out for claims | $ 1,550,000 | |