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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Jan. 31, 2017
Oct. 31, 2016
Oct. 31, 2015
Oct. 31, 2014
May 12, 2017
May 12, 2016
May 12, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock options granted (shares)   0 0 0      
Stock options fully vested   2 years          
Expiry of options   10 years          
Long term Incentive Plan, Description   Long Term Incentive Plan is based on three-year performance periods          
Long-term incentive plan, Requisite service period   3 years          
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 $ 2.8 $ 3.6      
Grants in the period (shares)   0 0 0      
2001 Management Equity Incentive and Compensation Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock options granted under various plans (shares)   5,000,000          
Outside Directors Award Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock options granted under various plans (shares)   200,000          
Expiry of option   10 years          
Long Term Incentive Plan Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares of restricted stock (shares)     40,792        
Weighted average grant date fair value (usd per share)     $ 27.02        
Share based compensation expense   $ 1.5 $ 1.4 $ 2.3      
2005 Outside Directors Equity Award Plan Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares of restricted stock (shares)   42,435 25,560        
Weighted average grant date fair value (usd per share)   $ 26.51 $ 44.01        
Share based compensation expense   $ 1.1          
Class A Common Stock 2001 Plan | Officer              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share based compensation expense   $ 0.2 $ 0.3 $ 0.2      
Grants in the period (shares)       15,000      
Vesting installments (shares)           5,000 5,000
Scenario, Forecast | Long Term Incentive Plan Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares of restricted stock (shares) 31,075            
Scenario, Forecast | Class A Common Stock 2001 Plan | Officer              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting installments (shares)         5,000