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Quarterly Dividend Program (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Oct. 28, 2012
Jul. 29, 2012
Oct. 28, 2012
Dividends [Line Items]      
Cash dividend payment, per share $ 0.03 $ 0.03  
Dividend declared date   Jun. 13, 2012  
Cash dividends paid     $ 747
Special and quarterly dividends [Member]
     
Dividends [Line Items]      
Dividend declared date     Nov. 27, 2012
Special cash dividend payment, per share     $ 0.50
Quarterly cash dividend payment, per share $ 0.03   $ 0.03
Date of payment to shareholders entitled to dividends     Dec. 28, 2012
Date of record of shareholders entitled to dividends     Dec. 19, 2012