Strategic Technology Transactions, Goodwill and Other Purchased Intangible Assets - Changes in Carrying Value of Goodwill by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 28, 2013		Dec. 29, 2012
Segment Reporting Information [Line Items]
Goodwill	$ 58,756	[1]	$ 58,060
Additions net of adjustments	11,245
Impact of currency exchange	894		696
Goodwill	70,895		58,756	[1]
Semiconductor Equipment [Member]
Segment Reporting Information [Line Items]
Goodwill	55,520		54,872
Additions net of adjustments	11,245
Impact of currency exchange	840		648
Goodwill	67,605		55,520
Microwave Communications [Member]
Segment Reporting Information [Line Items]
Goodwill	3,236		3,188
Additions net of adjustments
Impact of currency exchange	54		48
Goodwill	$ 3,290		$ 3,236

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