Goodwill And Other Intangible Assets (Schedule Of Gross Carrying Amount And Accumulated Amortization Of Identifiable Intangible Assets, Other Than Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Identifiable Intangible Assets [Line Items]
Intangible assets, Accumulated Amortization	$ (109,639)	$ (95,242)
Total other intangible assets, Gross Carrying Amount	458,523	384,830
Customer Lists And Relationships [Member]
Identifiable Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	172,724	118,844
Intangible assets, Accumulated Amortization	(36,028)	(29,973)
Acquired Technology [Member]
Identifiable Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	99,383	94,689
Intangible assets, Accumulated Amortization	(56,879)	(53,224)
Other Intangible Assets [Member]
Identifiable Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	9,171	7,344
Intangible assets, Accumulated Amortization	(6,141)	(3,424)
Trademarks [Member]
Identifiable Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	53,510	55,320
Intangible assets, Accumulated Amortization	(10,591)	(8,621)
Trademarks [Member]
Identifiable Intangible Assets [Line Items]
Unamortized intangible assets, Gross Carrying Amount	$ 123,735	$ 108,633