Strategic Technology Transactions, Goodwill and Other Purchased Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended							1 Months Ended	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012	Dec. 29, 2012		Dec. 31, 2011	Jun. 29, 2013 Rasco technology [Member]	Dec. 29, 2012 Rasco technology [Member]	Aug. 31, 2012 Duma technology [Member]	Jun. 29, 2013 Ismeca technology [Member]	Dec. 31, 2012 Ismeca technology [Member]
Intangible Assets [Line Items]
Preliminary purchase price of acquisition										$ 1,000,000	$ 84,889,000	$ 84,889,000
Preliminary purchase price of acquisition, cash reserves											57,143,000	57,143,000
Preliminary purchase price of acquisition, liabilities assumed											27,746,000	27,746,000
Preliminary estimate of goodwill	76,853,000		76,853,000		58,756,000	[1]	58,060,000				19,273,000	19,273,000
Amortization of intangible assets on straight-line basis										3 years	8 years
Maximum future payments required										500,000
Amortization expenses related to intangible assets	1,700,000	1,000,000	3,400,000	2,000,000
Amounts excluded related to trade name								$ 2,300,000	$ 2,300,000		$ 4,700,000

[1] Derived from December 29, 2012 audited financial statements