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Stock-Based Benefit Plans (Details 3) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Apr. 30, 2014
Apr. 30, 2013
Apr. 30, 2014
Apr. 30, 2013
Oct. 31, 2013
Stock Price-Based RSUs issued          
Stock based expense recognized $ 4,625 $ 4,343 $ 12,294 $ 10,027  
Stock Price Based Restricted Stock Units [Member]
         
Stock Price-Based RSUs issued          
Stock based expense recognized 0 416 231 979  
Aggregate outstanding RSUs 0   0   306,000
Unamortized value of RSUs $ 0   $ 0   $ 231