Goodwill and Other Intangible Assets - Amortized Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 106,240		$ 106,240		$ 106,240
Accumulated Amortization	(45,208)		(45,208)		(37,272)
Net Amount	61,032		61,032		68,968
Amortization expense	2,597	1,831	7,936	5,557
Current Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	23,778		23,778		23,778
Accumulated Amortization	(15,960)		(15,960)		(14,060)
Net Amount	7,818		7,818		9,718
Patents and Patent Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	29,569		29,569		29,569
Accumulated Amortization	(20,314)		(20,314)		(17,919)
Net Amount	9,255		9,255		11,650
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	52,893		52,893		52,893
Accumulated Amortization	(8,934)		(8,934)		(5,293)
Net Amount	$ 43,959		$ 43,959		$ 47,600