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Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | Jul. 31, 2014 | Oct. 31, 2013
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Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Assets | $ 861,680 |  | $ 734,301 |
Accumulated Amortization | 494,264 |  | 398,876 |
Net Assets | 367,416 |  | 335,425 | [1]
Core/developed technology |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Assets | 459,147 |  | 380,724 |
Accumulated Amortization | 279,995 |  | 228,065 |
Net Assets | 179,152 |  | 152,659 |
Customer relationships |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Assets | 210,292 |  | 177,151 |
Accumulated Amortization | 86,370 |  | 69,745 |
Net Assets | 123,922 |  | 107,406 |
Contract rights intangible |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Assets | 146,842 |  | 140,517 |
Accumulated Amortization | 101,481 |  | 78,950 |
Net Assets | 45,361 |  | 61,567 |
Covenants not to compete |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Assets | 2,530 |  | 2,530 |
Accumulated Amortization | 2,530 |  | 2,480 |
Net Assets | 0 |  | 50 |
Trademarks and trade names |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Assets | 18,779 |  | 10,891 |
Accumulated Amortization | 7,056 |  | 5,459 |
Net Assets | 11,723 |  | 5,432 |
In-process research and development (IPR&D) |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Assets | 3,087 | [2] | 4,298 | [2]
Net Assets | 3,087 | [2] | 4,298 | [2]
Capitalized software development costs |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Assets | 21,003 |  | 18,190 |
Accumulated Amortization | 16,832 |  | 14,177 |
Net Assets | $ 4,171 |  | $ 4,013 |
[1] | Derived from audited financial statements.
[2] | IPR&D is reclassified to core/developed technology upon completion or is written off upon abandonment.

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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