Goodwill and Acquired Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended
	Jul. 04, 2014	Jun. 28, 2013
Goodwill And Other Intangible Asset [Line Items]
Change in goodwill	$ 34,300,000
Amortization of acquired intangible assets	4,029,000	3,501,000
Government Systems [Member]
Goodwill And Other Intangible Asset [Line Items]
Amortization of acquired intangible assets	921,000	593,000
Minimum [Member]
Goodwill And Other Intangible Asset [Line Items]
Other acquired intangible assets estimated useful lives	2 years
Maximum [Member]
Goodwill And Other Intangible Asset [Line Items]
Other acquired intangible assets estimated useful lives	10 years
NetNearU [Member] | Government Systems [Member]
Goodwill And Other Intangible Asset [Line Items]
Change in goodwill related to an acquisition	$ 34,100,000