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Stock Based Benefit Plans (Details1) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Jul. 31, 2011
Jul. 31, 2010
Jul. 31, 2011
Jul. 31, 2010
Performance Based Restricted Stock Units
       
RSUs issued        
Number issued     306,000 200,000
Closing price of the Company's common stock on date of issuance     $ 19.32 $ 18.38
Target price     $ 25.12 $ 23.89
Expected volatility     48.22% 49.92%
Risk-free interest rate     1.99% 2.43%
Expected life     3 3
Aggregate fair value of Performance-Based RSUs issued     $ 4,994 $ 3,160
RSU expense recognized        
RSU expense recognized 983 567 2,718 1,554
Aggregate outstanding RSUs 706,000 400,000 706,000 400,000
Cumulative unamortized value of RSUs 5,912 4,202 5,912 4,202
Non Performance Based Restricted Stock Units
       
RSUs issued        
Number issued     15,497 19,663
Closing price of the Company's common stock on date of issuance     $ 19.32 $ 18.38
Aggregate fair value of Performance-Based RSUs issued     299 361
Non-Performance-Based RSU expense recognized
       
RSU expense recognized        
RSU expense recognized 39 23 105 55
Aggregate outstanding RSUs 30,994 19,663 30,994 19,663
Cumulative unamortized value of RSUs $ 418 $ 306 $ 418 $ 306