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Stock-Based Benefit Plans (Details 8) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2010
Dec. 19, 2008
Jul. 31, 2012
Stock Price Based Restricted Stock Units [Member]
Oct. 31, 2012
Stock Price Based Restricted Stock Units [Member]
Oct. 31, 2011
Stock Price Based Restricted Stock Units [Member]
Oct. 31, 2010
Stock Price Based Restricted Stock Units [Member]
Dec. 20, 2011
Stock Price Based Restricted Stock Units [Member]
Dec. 20, 2010
Stock Price Based Restricted Stock Units [Member]
Dec. 21, 2009
Stock Price Based Restricted Stock Units [Member]
Stock Price-Based RSUs issued                      
Issuance of restricted stock and stock units, shares         118,800 0 306,000 200,000      
Closing price of the Company's common stock on date of issuance       $ 21.70            $ 19.32 $ 18.38
Target Price                    $ 25.12 $ 23.89
Volatility              48.22% 49.92%      
Risk-free interest rate              1.99% 2.43%      
Expected Life in Years Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions Expected Term             3 years 3 years      
Estimated fair value of restricted stock units issued              $ 4,994 $ 3,160      
RSU expense recognized 15,575 12,548 9,689     2,887 3,701 2,121      
Aggregate outstanding RSUs           506,000 706,000 400,000      
Unamortized value of stock compensation $ 14,200 $ 12,700 $ 11,100     $ 2,042 $ 4,929 $ 3,636