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Common Stock Repurchase Program (Detail) (USD $)
6 Months Ended 12 Months Ended 18 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended
Oct. 28, 2012
Apr. 29, 2012
Oct. 28, 2012
Common Stock
Oct. 28, 2012
Common Stock Repurchase Program June 2012 [Member]
Common Stock
Apr. 29, 2012
Common Stock Repurchase Program Fiscal 2012 [Member]
Common Stock
Aug. 29, 2012
Common Stock Repurchase Program August 2012 [Member]
Common Stock
Stockholders Equity Note [Line Items]            
Authorization amount for repurchase of common stock       $ 5,000,000 $ 7,000,000 $ 2,000,000
Cost of common stock repurchased $ 5,022,000 $ 5,384,000 $ 10,400,000 $ 5,000,000 $ 5,384,000  
Common stock repurchased     1,100,000 502,595