Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Earnings Per Share [Abstract]
Net income	$ 2,238	$ 11,010	$ 4,794	$ 17,010
Shares:
Weighted-average shares outstanding — basic	86,911	87,914	87,122	87,654
Dilutive potential common shares, using treasury stock method	496	188	1,038	523
Weighted-average shares outstanding — diluted	87,407	88,102	88,160	88,177
Net income per share:
Basic	$ 0.03	$ 0.13	$ 0.06	$ 0.19
Diluted	$ 0.03	$ 0.12	$ 0.05	$ 0.19