Goodwill and Other Purchased Intangible Assets - Changes in Carrying Value of Goodwill by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 28, 2014		Dec. 28, 2013
Segment Reporting Information [Line Items]
Goodwill	$ 71,313	[1]	$ 58,756
Additions net of adjustments			10,930
Impact of currency exchange	(238)		1,627
Goodwill	71,075		71,313	[1]
Semiconductor Equipment [Member]
Segment Reporting Information [Line Items]
Goodwill	67,983		55,520
Additions net of adjustments			10,930
Impact of currency exchange	(221)		1,533
Goodwill	67,762		67,983
Microwave Communications [Member]
Segment Reporting Information [Line Items]
Goodwill	3,330		3,236
Additions net of adjustments
Impact of currency exchange	(17)		94
Goodwill	$ 3,313		$ 3,330

[1] Derived from December 28, 2013 audited financial statements