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Stock Based Compensation - Plans (Tables)
3 Months Ended
Jul. 28, 2012
Stock Based Compensation [Abstract]  
Stock Based Compensation Plans
 1987 2004  
 Plan Plan Total
Options and/or restricted stock initially authorized5,850,000 1,350,000 7,200,000
Options and/or restricted stock available for grant:     
January 28, 201220,127 542,309 562,436
July 28, 201220,127 433,916 454,043