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Earnings Per Share - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended 36 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2013
Class of Stock [Line Items]        
Number of shares authorized to be purchased 4,000,000     4,000,000
Total cost of the shares repurchased     $ 15.0 $ 15.1
Shares repurchased of common stock 3,184,272     3,184,272
Antidilutive stock option 0 0 0  
Class A Common Stock [Member]
        
Class of Stock [Line Items]        
Calculation of EPS (i) multiply 40 percent times the average Class A shares outstanding, then divide that amount by the product of 40 percent of the average Class A shares outstanding plus 60 percent of the average Class B shares outstanding to get a percentage, (ii) undistributed net income divided by the average Class A shares outstanding, (iii) multiply item (i) by item (ii), (iv) add item (iii) to the Class A cash dividend. Diluted shares are factored into the Class A calculation.      
Percentage of shares outstanding used in two class method calculation 40.00%      
Cumulative dividends per share $ 0.01      
Common stock dividend per share $ 0.01      
Cumulative dividend period in arrear for voting right 4      
Repurchase of common stock 0      
Shares repurchased of common stock 1,425,452     1,425,452
Dividends per share $ 1.68 $ 1.68    
Class B Common Stock [Member]
        
Class of Stock [Line Items]        
Calculation of EPS (i) multiply 60 percent times the average Class B shares outstanding, then divide that amount by the product of 40 percent of the average Class A shares outstanding plus 60 percent of the average Class B shares outstanding to get a percentage, (ii) undistributed net income divided by the average Class B shares outstanding, (iii) multiply item (i) by item (ii), (iv) add item (iii) to the Class B cash dividend. Class B diluted EPS is identical to Class B basic EPS.      
Percentage of shares outstanding used in two class method calculation 60.00%      
Non-Cumulative dividends per share $ 0.005      
Common stock dividend per share $ 0.015      
Repurchase of common stock 0      
Shares repurchased of common stock 1,758,820     1,758,820
Dividends per share $ 2.51 $ 2.51