Reinsurance (Schedule Of Reinsurance Activity) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reinsurance [Abstract]
Net assumed written premiums	$ 72.5	$ 56.4	$ 61.7
Net premiums earned	62.7	60.3	57.3
Provision for claims	46.4	38.8	37.9
Amortization of capitalized acquisition costs	$ 1.5	$ 1.4	$ 1.4