Goodwill And Intangible Assets (Summary Of Intangible Assets) (Details) (USD $)	Jan. 31, 2012		Oct. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 367,201,000	[1]	$ 364,066,000
Accumulated Amortization	185,686,000	[1]	168,035,000
Net Assets	181,515,000		196,031,000
Acquisition of additional intangible assets	2,400,000
Core/Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	228,328,000	[1]	226,928,000
Accumulated Amortization	115,766,000	[1]	104,391,000
Net Assets	112,562,000		122,537,000
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	80,838,000	[1]	80,238,000
Accumulated Amortization	34,451,000	[1]	31,250,000
Net Assets	46,387,000		48,988,000
Contract Rights Intangible [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	33,400,000	[1]	33,300,000
Accumulated Amortization	21,808,000	[1]	19,801,000
Net Assets	11,592,000		13,499,000
Trademarks And Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	6,400,000	[1]	6,400,000
Accumulated Amortization	2,816,000	[1]	2,561,000
Net Assets	3,584,000		3,839,000
In-Process Research And Development (IPR&D) [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	3,725,000	[1],[2]	3,425,000	[2]
Net Assets	3,725,000	[2]	3,425,000	[2]
Capitalized Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	11,980,000	[1]	11,245,000
Accumulated Amortization	8,669,000	[1]	7,927,000
Net Assets	3,311,000		3,318,000
Covenants Not To Compete [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	2,530,000	[1]	2,530,000
Accumulated Amortization	2,176,000	[1]	2,105,000
Net Assets	$ 354,000		$ 425,000

[1] During the first quarter of fiscal 2012, the Company acquired $2.4 million of additional intangible assets.

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