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Stock-Based Compensation (Details Textual) (USD $)
In Thousands, except Share data, unless otherwise specified
 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2012
Maximum [Member]
Jul. 31, 2012
Minimum [Member]
Jul. 31, 2012
2005 Stock Incentive Plan [Member]
Jul. 31, 2012
2005 Stock Incentive Plan [Member]
Apr. 30, 2011
2005 Stock Incentive Plan [Member]
Jul. 31, 2012
2011 Management Incentive Plan [Member]
Jul. 31, 2012
2011 Management Incentive Plan [Member]
Jan. 26, 2012
2011 Management Incentive Plan [Member]
Person
Apr. 30, 2011
2011 Management Incentive Plan [Member]
Share-Based Compensation (Textual) [Abstract]                      
Maximum awards issuable under 2011 Plan                     1,500,000
New awards will be made under our 2005 Stock Incentive Plan             0        
Number of non-employee director                   12  
Restricted shares granted to each non-employee director                   1,000  
Total restricted shares granted to non-employee directors                 12,000    
Closing price of stock                   $ 27.68  
Stock options vesting period     5 years 1 year              
Stock options expiration term     5 years 2 years              
Outstanding stock options, weighted-average remaining contractual term           4 years 10 months 24 days     1 year 10 months 24 days    
Exercisable stock options, weighted-average remaining contractual term         4 years 1 month 6 days            
Stock-based compensation expense $ 324 $ 132           $ 100 $ 300