Acquisitions (Schedule Of Amortization Periods For Acquired Intangible Assets) (Details)	3 Months Ended
	Mar. 31, 2014
Customer relationships
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Identifiable Intangible Asset, Useful Life (Yrs)	10 years
Noncompete agreements
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Identifiable Intangible Asset, Useful Life (Yrs)	2 years
Minimum | Proprietary technology
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Identifiable Intangible Asset, Useful Life (Yrs)	6 years
Maximum | Proprietary technology
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Identifiable Intangible Asset, Useful Life (Yrs)	10 years