Loss And Loss Adjustment Expense Reserves (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Unusual or Infrequent Item, or Both [Line Items]
Prior year claims and claims adjustment expense	$ (19,784)	$ 51,359
Catastrophe
Unusual or Infrequent Item, or Both [Line Items]
Liability for catastrophe claims, carrying amount	190,000	43,000
Adjustments for prior year claims	$ 1,000	$ (3,000)