Goodwill and Other Intangible Assets - Amortized Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 69,040		$ 69,040		$ 69,040
Accumulated Amortization	(35,446)		(35,446)		(29,889)
Net Amount	33,594		33,594		39,151
Amortization expense	1,831	1,670	5,557	3,210
Current Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	18,978		18,978		18,978
Accumulated Amortization	(13,643)		(13,643)		(12,391)
Net Amount	5,335		5,335		6,587
Patent and Patent Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	29,569		29,569		29,569
Accumulated Amortization	(17,113)		(17,113)		(14,618)
Net Amount	12,456		12,456		14,951
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	20,493		20,493		20,493
Accumulated Amortization	(4,690)		(4,690)		(2,880)
Net Amount	$ 15,803		$ 15,803		$ 17,613