Acquisitions (Schedule Of Amortized Periods For Acquired Intangible Assets) (Details)	9 Months Ended
	Sep. 30, 2012
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable Intangible Asset, Useful Life (Yrs)	12 years
Proprietary Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable Intangible Asset, Useful Life (Yrs)	10 years
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable Intangible Asset, Useful Life (Yrs)	2 years