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Stock Options and RSUs Excluded from Diluted Net Income per Common Share since the Effect of Including these Stock Options and Restricted Stock Units would have been Anti-dilutive (Detail)
In Thousands, unless otherwise specified
3 Months Ended
Jan. 31, 2012
Jan. 31, 2011
Stock Option
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 1,359 90
Restricted stock units
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 104 573
Performance shares
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount   68