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Stock-Based Compensation (Details Textual) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Jan. 31, 2013
Restricted Stock [Member]
Apr. 30, 2011
2005 Stock Incentive Plan [Member]
Jan. 31, 2013
2005 Stock Incentive Plan [Member]
Jan. 28, 2013
2011 Management Incentive Plan [Member]
Directors
Jan. 31, 2013
2011 Management Incentive Plan [Member]
Apr. 30, 2011
2011 Management Incentive Plan [Member]
Apr. 30, 2011
2011 Management Incentive Plan [Member]
Board Of Director Members For April Two Thousand Eleven Option Grants [Member]
Oct. 31, 2011
2011 Management Incentive Plan [Member]
Board Of Director Members For October Two Thousand Eleven Option Grants [Member]
Jan. 28, 2013
2011 Management Incentive Plan [Member]
Employee Stock [Member]
Apr. 30, 2011
2011 Management Incentive Plan [Member]
Stock Options [Member]
Board Of Director Members For April Two Thousand Eleven Option Grants [Member]
Oct. 31, 2011
2011 Management Incentive Plan [Member]
Stock Options [Member]
Board Of Director Members For October Two Thousand Eleven Option Grants [Member]
Jan. 28, 2013
2011 Management Incentive Plan [Member]
Restricted Stock [Member]
Share-Based Compensation (Textual) [Abstract]                            
Granted, Weighted-Average Exercise Price             $ 23.48              
Common stock shares authorized under ESPP               1,500,000            
Common stock shares purchased under ESPP       0                    
Options granted to each director             10,000              
Stock options vesting period                       1 year 5 years  
Restricted stock closing price awarded to non employee director           $ 24.71                
Term of vested stock options                 2 years 5 years        
weighted average remaining life of stock options         5 years 1 month 6 days   3 years              
Exercisable stock options, weighted-average remaining contractual term         3 years 10 months 24 days   4 months 24 days              
Stock option shares vested         12,000   32,000              
Number of non-employee directors           12                
Total restricted shares issued to Non-employee Directors                           12,000
Stock compensation expense $ 116 $ 66 $ 100                      
Restricted shares issued per Non employee director                     1,000