Goodwill and Acquired Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Oct. 03, 2014	Sep. 30, 2015	Oct. 03, 2014
Finite-Lived Intangible Assets [Line Items]
Change in goodwill			$ 100
Amortization of acquired intangible assets	$ 4,587	$ 4,658	9,397	$ 8,687
Engreen [Member]
Finite-Lived Intangible Assets [Line Items]
Other acquired assets related to acquisition			$ 7,600
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Other acquired intangible assets estimated useful lives			2 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Other acquired intangible assets estimated useful lives			10 years