Reinsurance (Schedule Of Reinsurance Activity) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reinsurance [Abstract]
Net assumed written premiums	$ 56.4	$ 61.7	$ 51.8
Net premiums earned	60.3	57.3	51.0
Provision for claims	38.8	37.9	30.1
Amortization of capitalized acquisition costs	$ 1.4	$ 1.4	$ 1.3