Property And Equipment (Schedule Of Property And Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Land and land improvements	$ 2.9	$ 2.9
Building and improvements	59.1	59.3
Data processing equipment and software	46.5	41.1
Office furniture and equipment	3.4	3.4
Leasehold improvements	0.7	2.3
Total property and equipment	112.6	109.0
Less: Accumulated depreciation on property and equipment	(55.3)	(49.6)
Property, Plant and Equipment, Net, Total	$ 57.3	$ 59.4