Goodwill and Other Intangible Assets - Amortized Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 69,040		$ 69,040		$ 69,040
Accumulated Amortization	(33,615)		(33,615)		(29,889)
Net Amount	35,425		35,425		39,151
Amortization expense	1,863	770	3,726	1,540
Current Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	18,978		18,978		18,978
Accumulated Amortization	(13,226)		(13,226)		(12,391)
Net Amount	5,752		5,752		6,587
Patent and Patent Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	29,569		29,569		29,569
Accumulated Amortization	(16,302)		(16,302)		(14,618)
Net Amount	13,267		13,267		14,951
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	20,493		20,493		20,493
Accumulated Amortization	(4,087)		(4,087)		(2,880)
Net Amount	$ 16,406		$ 16,406		$ 17,613