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Fair Value Measures - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified | Jul. 31, 2014 | Oct. 31, 2013
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total assets | $ 587,533 | $ 691,528
Total liabilities | 3,343 | 5,731
Money Market Funds (U.S.) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash equivalents | 439,248 | 552,470
Foreign Currency Derivative Contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Prepaid and other current assets | 6,352 | 12,437
Accounts payable and accrued liabilities | 3,343 | 5,238
Deferred Compensation Plan Assets |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other long-term assets | 141,933 | 126,621
Contingent Consideration |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Accounts payable and accrued liabilities |  | 493
Quoted Prices In Active Markets For Identical Assets (Level 1) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total assets | 581,181 | 679,091
Total liabilities | 0 | 0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Money Market Funds (U.S.) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash equivalents | 439,248 | 552,470
Quoted Prices In Active Markets For Identical Assets (Level 1) | Foreign Currency Derivative Contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Prepaid and other current assets | 0 | 0
Accounts payable and accrued liabilities | 0 | 0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Deferred Compensation Plan Assets |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other long-term assets | 141,933 | 126,621
Quoted Prices In Active Markets For Identical Assets (Level 1) | Contingent Consideration |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Accounts payable and accrued liabilities |  | 0
Significant Other Observable Inputs (Level 2) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total assets | 6,352 | 12,437
Total liabilities | 3,343 | 5,238
Significant Other Observable Inputs (Level 2) | Money Market Funds (U.S.) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash equivalents | 0 | 0
Significant Other Observable Inputs (Level 2) | Foreign Currency Derivative Contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Prepaid and other current assets | 6,352 | 12,437
Accounts payable and accrued liabilities | 3,343 | 5,238
Significant Other Observable Inputs (Level 2) | Deferred Compensation Plan Assets |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other long-term assets | 0 | 0
Significant Other Observable Inputs (Level 2) | Contingent Consideration |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Accounts payable and accrued liabilities |  | 0
Significant Unobservable Inputs (Level 3) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total assets | 0 | 0
Total liabilities | 0 | 493
Significant Unobservable Inputs (Level 3) | Money Market Funds (U.S.) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash equivalents | 0 | 0
Significant Unobservable Inputs (Level 3) | Foreign Currency Derivative Contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Prepaid and other current assets | 0 | 0
Accounts payable and accrued liabilities | 0 | 0
Significant Unobservable Inputs (Level 3) | Deferred Compensation Plan Assets |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other long-term assets | 0 | 0
Significant Unobservable Inputs (Level 3) | Contingent Consideration |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Accounts payable and accrued liabilities |  | $ 493

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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