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Net Income Per Share (Details) (USD $)
In Thousands, except Per Share data
3 Months Ended6 Months Ended
Oct. 02, 2011
Sep. 26, 2010
Oct. 02, 2011
Sep. 26, 2010
Net Income Per Share [Abstract]    
Net income$ 28,654$ 29,986$ 61,080$ 55,435
Shares:    
Weighted-average shares outstanding - basic103,273108,220103,976109,823
Dilutive potential common shares, using treasury stock method2898197001,562
Weighted-average shares outstanding - diluted103,562109,039104,676111,385
Net income per share:    
Basic$ 0.28$ 0.28$ 0.59$ 0.50
Diluted$ 0.28$ 0.28$ 0.58$ 0.50