Property And Equipment (Schedule Of Property And Equipment) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property And Equipment [Abstract]
Land and land improvements	$ 2.3	$ 2.3
Building and improvements	13.4	12.2
Data processing equipment and software	42.4	37.2
Office furniture and equipment	3.6	2.9
Leasehold improvements	0.1	0.1
Total property and equipment	61.8	54.7
Less: Accumulated depreciation on property and equipment	(39.6)	(36.2)
Total property and equipment, net	$ 22.2	$ 18.5