Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Earnings Per Share [Abstract]
Basic and diluted Net (loss) income attributable to common stockholders	$ (35,570)	$ 11,771	$ (88,917)	$ 23,755
Shares used in basic Net (loss) income per share (in shares)	116,903	117,904	116,883	117,170
Dilutive effect of stock options, RSUs and ESPP shares (in shares)	0	3,040	0	2,871
Shares used in diluted Net (loss) income per share (in shares)	116,903	120,944	116,883	120,041
Basic Net (loss) income per share (in dollars per share)	$ (0.30)	$ 0.10	$ (0.76)	$ 0.20
Diluted Net (loss) income per share (in dollars per share)	$ (0.30)	$ 0.10	$ (0.76)	$ 0.20
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)	9,000	1,700	10,800	2,300