v2.4.0.6
Employee Benefit Plans (Equity Compensation Plans) - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended
Oct. 31, 2012
Stock Option
Oct. 31, 2011
Stock Option
Oct. 31, 2010
Stock Option
Oct. 31, 2009
Stock Option
Apr. 25, 2006
2005 Directors Plan
Oct. 31, 2012
2005 Directors Plan
May 23, 2005
2005 Directors Plan
Oct. 31, 2012
2005 Directors Plan
Stock Option
Oct. 31, 2012
2005 Directors Plan
Stock Option
Minimum
Oct. 31, 2012
2005 Directors Plan
Stock Option
Maximum
Oct. 31, 2012
2005 Directors Plan
Restricted Stock
Apr. 03, 2012
2006 Employee Equity Incentive Plan
Oct. 31, 2012
2006 Employee Equity Incentive Plan
Oct. 31, 2012
2006 Employee Equity Incentive Plan
Stock Options
Oct. 31, 2012
2006 Employee Equity Incentive Plan
Restricted Stock Units
Oct. 31, 2012
1994 Non-Employee Directors Stock Option Plan
Oct. 31, 2012
Other Assumed Stock Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share based compensation arrangement for options contractual term (in years)                         7 years        
Additional reserved for future issuance under the 2006 Employee Plan                       5,000,000          
Aggregate stock options outstanding               123,649           10,200,000      
Aggregate restricted stock award outstanding                     57,451       3,900,000    
Shares available for future grant 7,352,000 [1] 5,911,000 [1] 2,606,000 [1] 6,703,000 [1]                 7,400,000        
Vesting period, (in years)                 3 years 4 years     4 years        
Number of shares available contingent upon cancellation or expiration of prior plans                         1,200,000        
Reserved for future issuance           365,464 300,000                    
Shares increase number of shares reserved for future issuance under the 2005 Directors Plan         500,000                        
Restricted stock awards issued           274,230                      
Aggregate grant date fair value of restricted stock awards           $ 6.2                      
Aggregate stock options granted under 2005 director plan               123,649                  
Fair value of option shares granted               $ 3.3                  
Aggregate stock options outstanding under 1994 director plan                               280,000  
Shares assumed through acquisitions                                 3,500,000
Assumed shares remaining outstanding                                 700,000
[1] Excluding shares reserved for future issuance under the 2005 Directors Plan.