Loss And Loss Adjustment Expense Reserves (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Unusual or Infrequent Item, or Both [Line Items]
Prior year claims and claims adjustment expense	$ 51,359	$ (15,409)
Catastrophe
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax catastrophe losses, net of reinsurance benefits	43,000	60,000
Liability for catastrophe claims, carrying amount	40,000	64,000
Adjustments for prior year claims	$ (3,000)	$ 4,000