Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014		Oct. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 859,071		$ 734,301
Accumulated Amortization	460,511		398,876
Net Assets	398,560		335,425	[1]
Developed And Core Technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	449,347		380,724
Accumulated Amortization	261,641		228,065
Net Assets	187,706		152,659
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	210,278		177,151
Accumulated Amortization	80,549		69,745
Net Assets	129,729		107,406
Contract Rights Intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	146,785		140,517
Accumulated Amortization	93,534		78,950
Net Assets	53,251		61,567
Covenants Not To Compete
Finite-Lived Intangible Assets [Line Items]
Gross Assets	2,530		2,530
Accumulated Amortization	2,513		2,480
Net Assets	17		50
Trademarks and Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	18,779		10,891
Accumulated Amortization	6,348		5,459
Net Assets	12,431		5,432
In-Process Research And Development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	11,287	[2]	4,298	[2]
Net Assets	11,287	[2]	4,298	[2]
Capitalized Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	20,065		18,190
Accumulated Amortization	15,926		14,177
Net Assets	$ 4,139		$ 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.