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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Jan. 31, 2016
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options granted   0 0 0
Stock options fully vested   2 years    
Expiry of options   10 years    
Long-term incentive plan, Requisite service period   3 years    
Long term Incentive Plan, Description   Long Term Incentive Plan is based on three-year performance periods    
Payments for employee long term incentive plan paid in cash   50.00%    
Payments for employee long term incentive plan in restricted shares   50.00%    
Share based compensation expense   $ 2.8 $ 3.6 $ 3.7
Granted, Shares   0 0 0
2001 Management Equity Incentive and Compensation Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options granted under various plans   5,000,000    
Outside Directors Award Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options granted under various plans   200,000    
Expiry of option   10 years    
2005 Outside Directors Equity Award Plan Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares of restricted stock   25,560 22,059  
Weighted average grant date fair value   $ 44.01 $ 50.99  
Share based compensation expense   $ 1.1 $ 1.1 $ 0.8
Long Term Incentive Plan Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares of restricted stock     49,702  
Weighted average grant date fair value     $ 45.71  
Share based compensation expense   1.4 $ 2.3 $ 2.9
Long Term Incentive Plan Restricted Stock [Member] | Subsequent Event [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares of restricted stock 42,497      
Weighted average grant date fair value $ 34.05      
Class A Common Stock 2001 Plan [Member] | Officer [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share based compensation expense   $ 0.3 $ 0.2  
Granted, Shares   15,000    
Vested, shares   5,000