Goodwill and Other Intangible Assets - Amortized Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 69,040		$ 69,040
Accumulated Amortization	(31,752)		(29,889)
Net Amount	37,288		39,151
Amortization expense	1,863	770
Current Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	18,978		18,978
Accumulated Amortization	(12,809)		(12,391)
Net Amount	6,169		6,587
Patent and Patent Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	29,569		29,569
Accumulated Amortization	(15,460)		(14,618)
Net Amount	14,109		14,951
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	20,493		20,493
Accumulated Amortization	(3,483)		(2,880)
Net Amount	$ 17,010		$ 17,613