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Earnings Per Share - Additional Information (Detail) - USD ($)
 12 Months Ended 36 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2015
Class of Stock [Line Items]        
Number of shares authorized to be purchased 4,000,000     4,000,000
Shares repurchased of common stock 3,184,272     3,184,272
Total cost of the shares repurchased       $ 0
Antidilutive stock option 0 0 0  
Class A Common Stock [Member]        
Class of Stock [Line Items]        
Percentage of shares outstanding used in two class method calculation 40.00%      
Voting rights The Class A Common Stock has no voting rights unless four quarterly cumulative dividends upon the Class A Common Stock are in arrears.      
Repurchase of common stock 0      
Shares repurchased of common stock 1,425,452     1,425,452
Class B Common Stock [Member]        
Class of Stock [Line Items]        
Percentage of shares outstanding used in two class method calculation 60.00%      
Voting rights The Class B Common Stock has full voting rights.      
Repurchase of common stock 0      
Shares repurchased of common stock 1,758,820     1,758,820