Loss And Loss Adjustment Expense Reserves (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Unusual or Infrequent Item, or Both [Line Items]
Prior year claims and claims adjustment expense	$ 49,942	$ (23,714)
Catastrophe
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax catastrophe losses, net of reinsurance benefits	62,000	85,000
Liability for catastrophe claims, carrying amount	58,000	91,000
Adjustments for prior year claims	$ (4,000)	$ 6,000