Acquisition, Goodwill, And Other Intangible Assets (Schedule Of Acquired Identifiable Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 years
Acquired Finite-Lived Intangible Assets [Line Items]
Value of acquired intangible assets	$ 88,049
Customer Related Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Value of acquired intangible assets	44,355
Amortization period (in years)	9
Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Value of acquired intangible assets	43,446
Amortization period (in years)	8
Trade Name [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Value of acquired intangible assets	$ 248
Amortization period (in years)	1