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Restructuring Charges (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Sep. 29, 2012
Oct. 01, 2011
Restructuring Cost and Reserve [Line Items]        
Restructuring and Related Cost, Number of Positions Eliminated   46    
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent   2.00%    
Restructuring charges $ 0 $ 3,369 $ 0 $ 3,369