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Earnings Per Share (Details 2)
 3 Months Ended 9 Months Ended
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2012
Jul. 31, 2011
Class A common stock [Member]
        
Class A Common Stock:        
Basic shares 25,200,000 24,900,000 25,100,000 24,800,000
Assumed conversion of stock options 95,502 215,900 107,124 209,696
Diluted shares 25,300,000 25,100,000 25,200,000 25,000,000
Class B common stock [Member]
        
Class A Common Stock:        
Basic shares 22,100,000 22,400,000 22,100,000 22,400,000
Diluted shares 22,100,000 22,400,000 22,100,000 22,400,000
Class B Common Stock:        
Basic and diluted shares 22,119,966 22,362,266 22,120,533 22,386,818