Goodwill and Other Purchased Intangible Assets - Purchased Intangible Assets, Subject to Amortization (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014	Dec. 28, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 64,262	$ 64,468
Accumulated Amortization	29,562	25,536
Rasco Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,453	33,689
Accumulated Amortization	23,291	21,319
Remaining Useful Life	2 years 6 months
Ismeca Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	29,945	29,915
Accumulated Amortization	5,719	3,809
Remaining Useful Life	6 years 6 months
Duma Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	864	864
Accumulated Amortization	$ 552	$ 408
Remaining Useful Life	1 year 1 month 6 days