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Stock Repurchase Program (Tables)
3 Months Ended
Jan. 31, 2012
Stock Repurchase Program [Abstract]  
Stock repurchase program
      September 30,       September 30,  
    Three months ended
January 31,
 
    2012     2011  

Number of shares purchased

    3,000       8,000  

Average price per share

  $ 20.61     $ 19.23  

Remaining authorization at January 31 (in thousands):

    8,783       11,822