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Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2014
Oct. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
Gross Assets $ 861,680 $ 734,301
Accumulated Amortization 494,264 398,876
Net Assets 367,416 335,425 [1]
Core/developed technology
    
Finite-Lived Intangible Assets [Line Items]    
Gross Assets 459,147 380,724
Accumulated Amortization 279,995 228,065
Net Assets 179,152 152,659
Customer relationships
    
Finite-Lived Intangible Assets [Line Items]    
Gross Assets 210,292 177,151
Accumulated Amortization 86,370 69,745
Net Assets 123,922 107,406
Contract rights intangible
    
Finite-Lived Intangible Assets [Line Items]    
Gross Assets 146,842 140,517
Accumulated Amortization 101,481 78,950
Net Assets 45,361 61,567
Covenants not to compete
    
Finite-Lived Intangible Assets [Line Items]    
Gross Assets 2,530 2,530
Accumulated Amortization 2,530 2,480
Net Assets 0 50
Trademarks and trade names
    
Finite-Lived Intangible Assets [Line Items]    
Gross Assets 18,779 10,891
Accumulated Amortization 7,056 5,459
Net Assets 11,723 5,432
In-process research and development (IPR&D)
    
Finite-Lived Intangible Assets [Line Items]    
Gross Assets 3,087 [2] 4,298 [2]
Net Assets 3,087 [2] 4,298 [2]
Capitalized software development costs
    
Finite-Lived Intangible Assets [Line Items]    
Gross Assets 21,003 18,190
Accumulated Amortization 16,832 14,177
Net Assets $ 4,171 $ 4,013
[1] Derived from audited financial statements.
[2] IPR&D is reclassified to core/developed technology upon completion or is written off upon abandonment.