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Earnings Per Share (Schedule of Stock Options to Purchase Common Stock Not Included in Diluted Net Income Per Share Calculation) (Details) (Stock Options [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Apr. 30, 2013
Apr. 30, 2012
Apr. 30, 2013
Apr. 30, 2012
Stock Options [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Numbers of stock option shares excluded 0 10 4 99
Lower, Range of exercise prices $ 0 $ 80.51 $ 102 $ 73.40
Upper, Range of exercise prices $ 0 $ 80.51 $ 102 $ 80.51