Goodwill and Other Intangible Asset Data - Amortized Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 69,040				$ 37,883				$ 69,040	$ 37,883
Accumulated Amortization	(29,889)				(25,216)				(29,889)	(25,216)
Net Amount	39,151				12,667				39,151	12,667
Amortization expense	1,463	1,670	770	770	806	843	836	835	4,673	3,320	3,211
Current Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	18,978				12,718				18,978	12,718
Accumulated Amortization	(12,391)				(11,403)				(12,391)	(11,403)
Net Amount	6,587				1,315				6,587	1,315
Patent and Patent Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	29,569				23,392				29,569	23,392
Accumulated Amortization	(14,618)				(12,079)				(14,618)	(12,079)
Net Amount	14,951				11,313				14,951	11,313
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	20,493				1,773				20,493	1,773
Accumulated Amortization	(2,880)				(1,734)				(2,880)	(1,734)
Net Amount	$ 17,613				$ 39				$ 17,613	$ 39