Acquisition, Goodwill Impairment and Long-lived Asset Impairment (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Nov. 21, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value as of acquisition date	$ 31,497	$ 31,581
Amortization expense during period	(20,517)	(17,187)
Net carrying amount, end of period	10,980	14,394
Developed technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value as of acquisition date	17,700	17,489
Amortization expense during period	(8,277)	(5,600)
Net carrying amount, end of period	9,423	11,889
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value as of acquisition date	9,538	9,517
Amortization expense during period	(8,643)	(8,164)
Net carrying amount, end of period	895	1,353
In-process research and development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value as of acquisition date		316
Amortization expense during period		0
Net carrying amount, end of period		316
Nanda [Member] | Developed technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Net carrying amount, beginning of period	8,603
Fair Value as of acquisition date			9,200
Adjustments to carrying value	279	(393)
Amortization expense during period	(1,752)	(204)
Net carrying amount, end of period	7,130	8,603
Nanda [Member] | Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Net carrying amount, beginning of period	957
Fair Value as of acquisition date			1,040
Adjustments to carrying value	12	(45)
Amortization expense during period	(330)	(38)
Net carrying amount, end of period	639	957
Nanda [Member] | In-process research and development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Net carrying amount, beginning of period	316
Fair Value as of acquisition date			330
Adjustments to carrying value	(316)	(14)
Amortization expense during period	0	0
Net carrying amount, end of period	0	316
Nanda [Member] | Total identifiable intangible assets acquired [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Net carrying amount, beginning of period	9,876
Fair Value as of acquisition date			10,570
Adjustments to carrying value	(25)	(452)
Amortization expense during period	(2,082)	(242)
Net carrying amount, end of period	$ 7,769	$ 9,876