Goodwill and Purchased Intangible Assets - Purchased Intangible Assets Subject to Amortization (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
	Aug. 17, 2012	Dec. 29, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		$ 33,263	$ 31,737
Accumulated Amortization		16,572	12,149
Rasco technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		32,399	31,737
Accumulated Amortization		16,452	12,149
Remaining Useful Life		4 years
Duma technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		864
Accumulated Amortization		$ 120
Remaining Useful Life	3 years	2 years 7 months 6 days