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Stock-Based Compensation Plans - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock available for future grants (in shares) 4,358,384    
Stock option awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 507,028    
Compensation cost not yet recognized $ 3.8    
Period for recognition 1 year 10 months 2 days    
Stock option awards | Certain members of the Board of Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Term of award 10 years    
Stock option awards | Certain employees      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Term of award 10 years    
Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Compensation cost not yet recognized $ 4.8    
Period for recognition 2 years 3 months    
Performance share awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost not yet recognized $ 4.3    
Period for recognition 1 year 10 months 9 days    
Performance goal period 3 years    
Unrestricted common stock awards | Certain members of the Board of Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 10,090 8,388 11,412
Minimum | Performance share awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights percentage 200.00%    
Maximum | Performance share awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights percentage 0.00%    
Share-based Compensation Award, Tranche One | Stock option awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights percentage 33.33%    
Share-based Compensation Award, Tranche One | Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights percentage 33.33%    
Share-based Compensation Award, Tranche Two | Stock option awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights percentage 33.33%    
Share-based Compensation Award, Tranche Two | Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights percentage 33.33%    
Share-based Compensation Award, Tranche Three | Stock option awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights percentage 33.33%    
Share-based Compensation Award, Tranche Three | Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights percentage 33.33%