Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Earnings Per Share [Abstract]
Basic and diluted Net Income (Loss)	$ 1,890	$ (7,714)
Shares used in basic Net Income (Loss) per share (in shares)	115,391,000	118,174,000
Dilutive effect of stock options, RSUs and ESPP shares	1,323,000	0
Shares used in diluted Net Income (Loss) per share (in shares)	116,714,000	118,174,000
Basic Net Income (Loss) per share (in dollars per share)	$ 0.02	$ (0.07)
Diluted Net Income (Loss) per share (in dollars per share)	$ 0.02	$ (0.07)
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)	7,400,000	12,300,000