Business Combinations (Allocation Of Purchase Price To Identifiable Tangible And Acquisition Of Intangible Assets And Liabilities) (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2012
Business Acquisition [Line Items]
Intangible Assets ,Amount	$ 29,560
Current Technology [Member]
Business Acquisition [Line Items]
Intangible Assets ,Amount	6,260
Intangible Assets Useful life	5 years
Patent And Patent Rights [Member]
Business Acquisition [Line Items]
Intangible Assets ,Amount	4,580
Intangible Assets Useful life	7 years
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible Assets ,Amount	$ 18,720
Customer Relationships [Member] | Minimum [Member]
Business Acquisition [Line Items]
Intangible Assets Useful life	5 years
Customer Relationships [Member] | Maximum [Member]
Business Acquisition [Line Items]
Intangible Assets Useful life	9 years