Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Basic and diluted Net Income (Loss)	$ 5,040	$ (12,542)	$ 6,930	$ (20,256)
Shares used in basic Net Income (Loss) per share (in shares)	115,733,000	117,874,000	115,562,000	118,024,000
Dilutive effect of stock options, RSUs and ESPP shares (in shares)	1,376,000	0	1,373,000	0
Shares used in diluted Net Income (Loss) per share (in shares)	117,109,000	117,874,000	116,935,000	118,024,000
Basic Net Income (Loss) per share (in dollars per share)	$ 0.04	$ (0.11)	$ 0.06	$ (0.17)
Diluted Net Income (Loss) per share (in dollars per share)	$ 0.04	$ (0.11)	$ 0.06	$ (0.17)
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)	9,600,000	12,200,000	8,200,000	12,200,000