Property And Equipment (Schedule Of Property And Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Land and land improvements	$ 2.9	$ 2.9
Building and improvements	58.8	58.8
Data processing equipment and software	50.0	47.2
Office furniture and equipment	2.6	3.0
Total property and equipment	114.3	111.9
Less: Accumulated depreciation on property and equipment	(67.8)	(60.5)
Property, Plant and Equipment, Net, Total	$ 46.5	$ 51.4