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Stock Ownership (Tables)
 12 Months Ended
Mar. 31, 2012
Stock Ownership [Abstract]  
Summary of the changes in the number of shares of common stock, Class C preferred stock and treasury stock
                         
    Common
Stock Shares
Issued		     Class C
Convertible
Preferred
Stock
Shares
Issued		     Treasury
Stock
Shares		  

Balance at March 28, 2009

     22,999,313       32,500       3,580,829  

Stock options exercised

     647,147               101,600  
   

 

 

    

 

 

    

 

 

  

Balance at March 27, 2010

     23,646,460       32,500       3,682,429  

Shares issued in connection with three-for-two stock split

     11,983,603               1,859,328  

Stock options exercised

     408,601               36,227  
   

 

 

    

 

 

    

 

 

  

Balance at March 26, 2011

     36,038,664       32,500       5,577,984  

Stock options exercised

     816,594               390,007  
   

 

 

    

 

 

    

 

 

  

Balance at March 31, 2012

     36,855,258       32,500       5,967,991