Loss And Loss Adjustment Expense Reserves (Narrative) (Details) - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Unusual or Infrequent Item, or Both [Line Items] | ||
| Prior years | $ (44,114) | $ (46,896) |
| Liability for catastrophe claims, carrying amount | 168,000 | 460,000 |
| Amount remaining to be billed to reinsurers | 10,000 | |
| Catastrophe | ||
| Unusual or Infrequent Item, or Both [Line Items] | ||
| Adjustments for prior year claims | 61,000 | $ (14,000) |
| Fire | ||
| Unusual or Infrequent Item, or Both [Line Items] | ||
| Amount paid out for claims | $ 1,636,000 | |