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Stock Compensation Expense (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Jul. 31, 2014
Jul. 31, 2013
Jul. 31, 2014
Jul. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense before taxes $ 21,399 $ 16,490 $ 58,341 $ 49,719
Income tax benefit (4,905) (4,035) (13,372) (12,166)
Stock compensation expense after taxes 16,494 12,455 44,969 37,553
Cost of license
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense before taxes 2,176 1,566 5,952 4,872
Cost of maintenance and service
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense before taxes 684 366 1,646 1,210
Research and development expense
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense before taxes 10,126 8,114 28,037 23,655
Sales and marketing expense
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense before taxes 4,696 3,454 12,394 10,339
General and administrative expense
        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense before taxes $ 3,717 $ 2,990 $ 10,312 $ 9,643