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Stock-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
3 Months Ended
Jan. 02, 2019
director
$ / shares
shares
Dec. 14, 2018
$ / shares
shares
Jan. 31, 2019
USD ($)
shares
Jan. 31, 2018
USD ($)
Apr. 30, 2011
shares
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted shares granted     35,000    
Restricted Stock [Member] | Non-employee directors [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of non-employee directors | director 12        
Restricted shares granted per non-employee 1,750        
Restricted shares granted 21,000        
Share price | $ / shares $ 71.56        
Recognized stock-based compensation expense | $     $ 0.2    
Restricted Stock [Member] | Executive officers [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted shares granted   14,522      
Share price | $ / shares   $ 85.67      
Recognized stock-based compensation expense | $     $ 0.1    
Annual incremental vesting percentage   33.00%      
Stock Options [Member] | Minimum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     1 year    
Expiration period, after grant date     2 years    
Stock Options [Member] | Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     5 years    
Expiration period, after grant date     5 years    
2011 Management Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common stock shares authorized under plan         1,500,000
2011 Management Incentive Plan [Member] | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Recognized stock-based compensation expense | $     $ 1.0 $ 1.8  
Unrecognized stock based compensation expenses | $     $ 4.7