Goodwill And Intangible Assets (Amortization Expense Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Apr. 30, 2012		Apr. 30, 2011		Apr. 30, 2012		Apr. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 29,350		$ 19,405		$ 47,001		$ 37,127
Core/Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	16,520		11,658		27,896		22,976
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	4,539		3,368		7,739		6,561
Contract Rights Intangible [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	7,175		3,333		9,182		5,500
Covenants Not To Compete [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	70		50		141		100
Trademarks And Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	300		255		555		510
Capitalized Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 746	[1]	$ 741	[1]	$ 1,488	[1]	$ 1,480	[1]

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