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Income Taxes - Summary of Reconciliation of Beginning and Ending Balance of Gross Unrecognized Tax Benefit (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 31, 2017 | Oct. 31, 2016
Reconciliation of Unrecognized Tax Benefits [Roll Forward] |  |
Beginning balance | $ 106,542 | $ 132,054
Increases in unrecognized tax benefits related to prior year tax positions | 3,117 | 7,205
Decreases in unrecognized tax benefits related to prior year tax positions | (49,456) | (43,944)
Increases in unrecognized tax benefits related to current year tax positions | 31,007 | 13,880
Decreases in unrecognized tax benefits related to settlements with taxing authorities | (784) | (333)
Reductions in unrecognized tax benefits due to lapse of applicable statute of limitations | (2,635) | (2,659)
Increases in unrecognized tax benefits acquired | 1,934 | 49
Changes in unrecognized tax benefits due to foreign currency translation | 1,912 | 290
Ending Balance | $ 91,637 | $ 106,542

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- Definition Unrecognized Tax Benefits Acquisitions + References No definition available. + Details
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- Definition Unrecognized tax benefits, period increase decrease, due to foreign currency translation + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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