Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Numerator:
Net income (loss)	$ (113,403)	$ 26,120	$ (231,722)	$ 43,496
Denominator:
Weighted-average shares of common stock—basic (in shares)	234,242	222,412	230,918	219,079
Effect of dilutive securities (in shares)	0	21,275	0	23,573
Weighted-average shares of common stock—diluted (in shares)	234,242	243,687	230,918	242,652
Net income (loss) per share:
Basic (in dollars per share)	$ (0.48)	$ 0.12	$ (1.00)	$ 0.20
Diluted (in dollars per share)	$ (0.48)	$ 0.11	$ (1.00)	$ 0.18