Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013		Oct. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 732,634		$ 735,326
Accumulated Amortization	301,837		269,004
Net Assets	430,797		466,322
Developed And Core Technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	371,160		367,321
Accumulated Amortization	176,818		159,691
Net Assets	194,342		207,630
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	177,290		179,657
Accumulated Amortization	53,712		48,368
Net Assets	123,578		131,289
Contract Rights Intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	141,188		142,641
Accumulated Amortization	52,899		43,843
Net Assets	88,289		98,798
Covenants Not To Compete
Finite-Lived Intangible Assets [Line Items]
Gross Assets	2,530		2,530
Accumulated Amortization	2,387		2,354
Net Assets	143		176
Trademarks Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	10,894		10,900
Accumulated Amortization	4,279		3,793
Net Assets	6,615		7,107
In-Process Research And Development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	14,165	[1]	17,696	[1]
Accumulated Amortization		[1]
Net Assets	14,165	[1]	17,696	[1]
Capitalized Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	15,407		14,581
Accumulated Amortization	11,742		10,955
Net Assets	$ 3,665		$ 3,626

[1] IPR&D is reclassified to core/developed technology upon completion or is written off upon abandonment.