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Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands | Apr. 30, 2016 | Oct. 31, 2015
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Assets | $ 1,058,549 | $ 1,030,594 |
Accumulated Amortization | 738,473 | 666,935 |
Net Assets | 320,076 | 363,659 | [1]
Core/developed technology |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Assets | 604,463 | 584,293 |
Accumulated Amortization | 419,254 | 375,395 |
Net Assets | 185,209 | 208,898 |
Customer relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Assets | 235,697 | 231,908 |
Accumulated Amortization | 127,603 | 115,170 |
Net Assets | 108,094 | 116,738 |
Contract rights intangible |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Assets | 167,647 | 165,623 |
Accumulated Amortization | 153,590 | 141,763 |
Net Assets | 14,057 | 23,860 |
Covenants not to compete |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Assets | 2,530 | 2,530 |
Accumulated Amortization | 2,530 | 2,530 |
Net Assets | 0 | 0 |
Trademarks and trade names |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Assets | 20,729 | 20,729 |
Accumulated Amortization | 12,248 | 10,665 |
Net Assets | 8,481 | 10,064 |
Capitalized software development costs |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Assets | 27,483 | 25,511 |
Accumulated Amortization | 23,248 | 21,412 |
Net Assets | $ 4,235 | $ 4,099 |
[1] | Derived from audited financial statements.

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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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