Acquisition - Details of Finite-Lived Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Dec. 28, 2012
Finite-Lived Intangible Assets [Line Items]
Total purchased intangible assets	$ 22,500
Accumulated amortization December 28, 2012			(3,786)
Carrying amount December 28, 2012	18,714
Amortization for intangibles	(2,940)
Carrying amount June 28, 2013	15,774
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	7 years
Total purchased intangible assets	19,000
Accumulated amortization December 28, 2012			(3,449)
Amortization for intangibles	(2,594)
Trade-name [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	6 years
Total purchased intangible assets	1,900
Intellectual Property/Know-How [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	7 years
Total purchased intangible assets	1,600
Accumulated amortization December 28, 2012			(114)
Amortization for intangibles	$ (115)