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Property And Equipment Property And Equipment (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property And Equipment [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	$ 6.2	$ 6.3	$ 5.7
Property, Plant and Equipment, Disposals	$ 0.9	$ 0.3	$ 0.2

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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