Goodwill And Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 Y	Mar. 31, 2011
Goodwill and Intangible Assets Disclosure [Abstract]
Identifiable intangible assets minimum useful life (years)	1
Identifiable intangible assets maximum useful life (years)	20
Amortization expense	$ 3.7	$ 3.4
Estimated future amortization expense in year 2012	14.5
Estimated future amortization expense in year 2013	13.8
Estimated future amortization expense in year 2014	12.3
Estimated future amortization expense in year 2015	11.5
Estimated future amortization expense in year 2016	10.2
Estimated future amortization expense thereafter	$ 11.6