Goodwill And Intangible Assets (Summary Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2011		Oct. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 364,066	[1]	$ 441,810
Accumulated Amortization	168,035	[1]	192,154
Net Assets	196,031		249,656
Core/Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	226,928	[1]	263,592
Accumulated Amortization	104,391	[1]	118,587
Net Assets	122,537		145,005
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	80,238	[1]	113,020
Accumulated Amortization	31,250	[1]	55,040
Net Assets	48,988		57,980
Contract Rights Intangible [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	33,300	[1]	30,400
Accumulated Amortization	19,801	[1]	9,522
Net Assets	13,499		20,878
Covenants Not To Compete [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	2,530	[1]	2,200
Accumulated Amortization	2,105	[1]	1,884
Net Assets	425		316
Trademarks And Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	6,400	[1]	6,200
Accumulated Amortization	2,561	[1]	1,541
Net Assets	3,839		4,659
In-Process Research And Development (IPR&D) [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	3,425	[1],[2]	17,525
Net Assets	3,425	[2]	17,525
Capitalized Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	11,245	[1]	8,873
Accumulated Amortization	7,927	[1]	5,580
Net Assets	$ 3,318		$ 3,293

[1] Intangible assets as of October 31, 2011 decreased as compared to October 31, 2010 primarily due to the retirement of fully amortized assets.

[2] IPR&D is reclassified to core/developed technology upon completion.