Income (Loss) Per Share - Numerators and Denominators of Basic and Diluted Net Income (Loss) Per Share Computations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015
Numerator:
Net loss	$ (20,679)	$ (994)	$ (45,859)	$ (3,651)
Denominator:
Basic and diluted	77,342	88,426	77,168	88,541
Net loss per share:
Basic and diluted	$ (0.27)	$ (0.01)	$ (0.59)	$ (0.04)