Strategic Technology Transactions, Goodwill and Other Purchased Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended				1 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013 Rasco technology [Member]	Dec. 29, 2012 Rasco technology [Member]	Aug. 31, 2012 Duma technology [Member]	Sep. 28, 2013 Ismeca technology [Member]	Dec. 31, 2012 Ismeca technology [Member]
Intangible Assets [Line Items]
Purchase price of acquisition							$ 1,000,000		$ 88,800,000
Purchase price of acquisition, cash reserves									57,100,000
Purchase price of acquisition, liabilities assumed									31,700,000
Amortization of intangible assets on straight-line basis							3 years
Maximum future payments required							500,000
Amortization expenses related to intangible assets	2,600,000	1,000,000	6,000,000	3,000,000
Additional amortization expense	600,000
Amounts excluded related to trade name					$ 2,300,000	$ 2,300,000		$ 4,000,000