Intangible Assets and Acquisition Related Charges (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013
Finite-Lived Intangible Assets [Line Items]
Expected acquired intangible assets amortization expense, 2014	$ 2,900,000		$ 2,900,000
Expected acquired intangible assets amortization expense, 2015	2,900,000		2,900,000
Expected acquired intangible assets amortization expense, 2016	2,900,000		2,900,000
SiliconBlue Technologies Ltd.
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)			6 years 3 months 18 days
Gross	18,500,000		18,500,000
Accumulated Amortization	(4,543,000)		(4,543,000)
Intangible assets, net of amortization	13,957,000		13,957,000
Amortization of acquired intangible assets	700,000	700,000
Expected acquired intangible assets amortization expense, 2013	2,900,000		2,900,000
Expected acquired intangible assets amortization expense, 2017	2,200,000		2,200,000
Expected acquired intangible assets amortization expense, 2018	1,500,000		1,500,000
Acquisition related charges	0	200,000
SiliconBlue Technologies Ltd. | Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)			7 years
Gross	10,700,000		10,700,000
Accumulated Amortization	(2,357,000)		(2,357,000)
Intangible assets, net of amortization	8,343,000		8,343,000
SiliconBlue Technologies Ltd. | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)			5 years 6 months
Gross	7,800,000		7,800,000
Accumulated Amortization	(2,186,000)		(2,186,000)
Intangible assets, net of amortization	$ 5,614,000		$ 5,614,000