Property And Equipment (Schedule Of Property And Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Land and land improvements	$ 2.7	$ 2.5
Building and improvements	33.2	15.6
Data processing equipment and software	37.3	31.3
Office furniture and equipment	3.8	3.8
Leasehold improvements	2.2	2.2
Total property and equipment	79.2	55.4
Less: Accumulated depreciation on property and equipment	(39.0)	(34.9)
Property, Plant and Equipment, Net, Total	$ 40.2	$ 20.5