Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Earnings Per Share [Abstract]
Basic and diluted Net Income (Loss)	$ 8,844	$ (2,175)	$ 15,774	$ (22,431)
Shares used in basic Net Income (Loss) per share (in shares)	116,055,000	116,785,000	115,730,000	117,612,000
Dilutive effect of stock options, RSUs and ESPP shares (in shares)	1,294,000	0	1,363,000	0
Shares used in diluted Net Income (Loss) per share (in shares)	117,349,000	116,785,000	117,093,000	117,612,000
Basic Net Income (Loss) per share (in dollars per share)	$ 0.08	$ (0.02)	$ 0.14	$ (0.19)
Diluted Net Income (Loss) per share (in dollars per share)	$ 0.08	$ (0.02)	$ 0.13	$ (0.19)
Stock options, RSU's and ESPP shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of EPS (in shares)	8,600,000	11,300,000	8,500,000	11,300,000