Goodwill and Other Purchased Intangible Assets - Purchased Intangible Assets, Subject to Amortization (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 27, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 59,979	$ 64,468
Accumulated Amortization	29,483	25,536
Rasco Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	31,084	33,689
Accumulated Amortization	22,614	21,319
Remaining Useful Life	2 years 3 months 18 days
Ismeca Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	28,031	29,915
Accumulated Amortization	6,245	3,809
Remaining Useful Life	6 years 3 months 18 days
Duma Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	864	864
Accumulated Amortization	$ 624	$ 408
Remaining Useful Life	10 months 24 days