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Expected Amortization Expense for Acquired Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Sep. 28, 2012
Sep. 30, 2011
Mar. 30, 2012
Goodwill And Other Intangible Asset [Line Items]          
For the six months ended September 28, 2012 $ 4,041 $ 4,767 $ 8,105 $ 9,539  
Expected for the remainder of fiscal year 2013 7,502   7,502    
Expected for fiscal year 2014 13,888   13,888    
Expected for fiscal year 2015 13,812   13,812    
Expected for fiscal year 2016 10,206   10,206    
Expected for fiscal year 2017 4,630   4,630    
Thereafter 5,021   5,021    
Other acquired intangible assets, net $ 55,059   $ 55,059   $ 63,041