Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2014		Oct. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 893,002		$ 734,301
Accumulated Amortization	527,972		398,876
Net Assets	365,030		335,425
Core-developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	490,242		380,724
Accumulated Amortization	298,705		228,065
Net Assets	191,537		152,659
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	210,172		177,151
Accumulated Amortization	92,146		69,745
Net Assets	118,026		107,406
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	146,364		140,517
Accumulated Amortization	109,067		78,950
Net Assets	37,297		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	7,765		5,459
Net Assets	11,014		5,432
In-process research and development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	3,086	[1]	4,298	[1]
Accumulated Amortization	0	[1]	0	[1]
Net Assets	3,086	[1]	4,298	[1]
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	21,829		18,190
Accumulated Amortization	17,759		14,177
Net Assets	$ 4,070		$ 4,013

[1] IPR&D is reclassified to core/developed technology upon completion or is written off upon abandonment.