Summary Of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012		Oct. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 590,859	[1]	$ 364,066
Accumulated Amortization	239,966	[1]	168,035
Net Assets	350,893		196,031
Core/Developed Technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	307,986	[1]	226,928
Accumulated Amortization	144,566	[1]	104,391
Net Assets	163,420		122,537
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	134,914	[1]	80,238
Accumulated Amortization	43,412	[1]	31,250
Net Assets	91,502		48,988
Contract Rights Intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	116,800	[1]	33,300
Accumulated Amortization	36,058	[1]	19,801
Net Assets	80,742		13,499
Covenants Not To Compete
Finite-Lived Intangible Assets [Line Items]
Gross Assets	2,530	[1]	2,530
Accumulated Amortization	2,304	[1]	2,105
Net Assets	226		425
Trademarks And Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	7,400	[1]	6,400
Accumulated Amortization	3,426	[1]	2,561
Net Assets	3,974		3,839
In-Process Research And Development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	7,642	[1],[2]	3,425
Net Assets	7,642	[2]	3,425
Capitalized Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	13,587	[1]	11,245
Accumulated Amortization	10,200	[1]	7,927
Net Assets	$ 3,387		$ 3,318

[1] During the three and nine months ended July 31, 2012, the Company acquired $12.7 million and $227.3 million of intangible assets, respectively.

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