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		9 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 30, 2016	Oct. 02, 2015
Numerator:
Net loss	$ (16,012)	$ (4,811)	$ (61,871)	$ (8,462)
Denominator:
Basic and diluted	78,092	87,991	77,475	88,359
Net loss per share:
Basic and diluted	$ (0.21)	$ (0.05)	$ (0.80)	$ (0.10)