Goodwill and Acquired Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Dec. 30, 2011 Month Year	Dec. 31, 2010
Current and expected amortization expense for acquired intangible assets
Expected for the remainder of fiscal year 2012			$ 4,427,000
For the Nine months ended Dec, 30 2011	4,752,000	4,923,000	14,291,000	14,627,000
Expected for fiscal year 2013			15,527,000
Expected for fiscal year 2014			13,784,000
Expected for fiscal year 2015			13,708,000
Expected for fiscal year 2016			10,173,000
Thereafter			9,607,000
Total future amortization expense			67,226,000
Goodwill and Acquired Intangible Assets (Textual) [Abstract]
Change in goodwill related to foreign currency translation			400,000
Other acquired intangible assets estimated useful lives, minimum			8
Other acquired intangible assets estimated useful lives, maximum			10
Amortization of acquired intangible assets	$ 4,752,000	$ 4,923,000	$ 14,291,000	$ 14,627,000