Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Earnings Per Share [Abstract]
Net Income	$ 11,984	$ 1,890
Shares used in basic Net Income (Loss) per share (in shares)	116,436,000	115,391,000
Dilutive effect of stock options, RSUs and ESPP shares (in shares)	2,481,000	1,323,000
Shares used in diluted Net Income (Loss) per share (in shares)	118,917,000	116,714,000
Basic Net Income (Loss) per share (in dollars per share)	$ 0.10	$ 0.02
Diluted Net Income (Loss) per share (in dollars per share)	$ 0.10	$ 0.02
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)	5,300,000	7,400,000