Amortization Expense Of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Jul. 31, 2012		Jul. 31, 2011		Jul. 31, 2012		Jul. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 26,742		$ 17,662		$ 73,742		$ 54,789
Core/Developed Technology
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	14,076		10,901		41,972		33,877
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	4,472		3,248		12,211		9,809
Contract Rights Intangible
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	7,075		2,467		16,257		7,967
Covenants Not To Compete
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	58		50		199		150
Trademarks And Trade Names
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	310		255		865		765
Capitalized Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 751	[1]	$ 741	[1]	$ 2,238	[1]	$ 2,221	[1]

[1] Amortization of capitalized software development costs is included in cost of license revenue in the unaudited condensed consolidated statements of operations.