Goodwill and Purchased Intangible Assets - Details of Purchased Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended
	Dec. 27, 2013	Mar. 28, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 31,487	$ 31,487
Accumulated Amortization	(9,779)	(11,000)
Carrying Value	21,708	20,487
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	19,000	19,000
Accumulated Amortization	(8,764)	(9,826)
Carrying Value	10,236	9,174
Useful Life (in years)	7 years
Intellectual property know-how [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,600	1,600
Accumulated Amortization	(343)	(400)
Carrying Value	1,257	1,200
Useful Life (in years)	7 years
American Integration Technologies LLC [Member] | Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,900	1,900
Accumulated Amortization	(672)	(774)
Carrying Value	1,228	1,126
Useful Life (in years)	6 years
UCT [Member] | Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,987	8,987
Accumulated Amortization
Carrying Value	$ 8,987	$ 8,987