Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013		Oct. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 731,836		$ 735,326
Accumulated Amortization	334,617		269,004
Net Assets	397,219		466,322
Developed And Core Technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	373,938		367,321
Accumulated Amortization	194,017		159,691
Net Assets	179,921		207,630
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	176,878		179,657
Accumulated Amortization	59,041		48,368
Net Assets	117,837		131,289
Contract Rights Intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	140,269		142,641
Accumulated Amortization	61,837		43,843
Net Assets	78,432		98,798
Covenants Not To Compete
Finite-Lived Intangible Assets [Line Items]
Gross Assets	2,530		2,530
Accumulated Amortization	2,420		2,354
Net Assets	110		176
Trademarks Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	10,877		10,900
Accumulated Amortization	4,761		3,793
Net Assets	6,116		7,107
In-Process Research And Development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	10,975	[1]	17,696	[1]
Net Assets	10,975	[1]	17,696	[1]
Capitalized Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	16,369		14,581
Accumulated Amortization	12,541		10,955
Net Assets	$ 3,828		$ 3,626

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