Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014		Oct. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 735,485		$ 734,301
Accumulated Amortization	427,573		398,876
Net Assets	307,912		335,425	[1]
Developed And Core Technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	382,311		380,724
Accumulated Amortization	243,652		228,065
Net Assets	138,659		152,659
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	176,970		177,151
Accumulated Amortization	74,762		69,745
Net Assets	102,208		107,406
Contract Rights Intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	140,015		140,517
Accumulated Amortization	85,851		78,950
Net Assets	54,164		61,567
Covenants Not To Compete
Finite-Lived Intangible Assets [Line Items]
Gross Assets	2,530		2,530
Accumulated Amortization	2,497		2,480
Net Assets	33		50
Trademarks and Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	10,879		10,891
Accumulated Amortization	5,770		5,459
Net Assets	5,109		5,432
In-Process Research And Development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	3,688	[2]	4,298	[2]
Net Assets	3,688	[2]	4,298	[2]
Capitalized Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	19,092		18,190
Accumulated Amortization	15,041		14,177
Net Assets	$ 4,051		$ 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.