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Stock-Based Benefit Plans (Details 3) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Jul. 31, 2013
Jul. 31, 2012
Jul. 31, 2013
Jul. 31, 2012
Oct. 31, 2012
Stock Price-Based RSUs issued          
Stock based expense recognized $ 4,422 $ 3,367 $ 14,449 $ 12,227  
Stock Price Based Restricted Stock Units [Member]
         
Stock Price-Based RSUs issued          
Stock based expense recognized 416 679 1,395 2,207  
Aggregate outstanding RSUs 306,000   306,000   506,000
Unamortized value of RSUs $ 647   $ 647   $ 2,042