Summary Of Significant Accounting Policies (Summary Of Reinsurance Activity) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Net assumed written premiums	$ 45.0	$ 48.3	$ 58.2
Net premiums earned	48.2	52.3	51.5
Provision for claims	33.2	40.0	40.8
Amortization of capitalized acquisition costs	$ 1.2	$ 1.3	$ 1.3