Goodwill and Acquired Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 28, 2012	Dec. 30, 2011
Goodwill And Other Intangible Asset [Line Items]
Change in goodwill related to foreign currency translation			$ 100,000
Amortization of acquired intangible assets	$ 3,960,000	$ 4,752,000	$ 12,065,000	$ 14,291,000
Minimum [Member]
Goodwill And Other Intangible Asset [Line Items]
Other acquired intangible assets estimated useful lives, maximum			3 years
Maximum [Member]
Goodwill And Other Intangible Asset [Line Items]
Other acquired intangible assets estimated useful lives, maximum			10 years