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Income Taxes (Details 3) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2015
Reconciliation of change in gross unrecognized tax benefits |  |  |
Balance, beginning of period | $ 30,272 | $ 51,889 | $ 58,318
Increase in benefit as a result of tax positions taken in prior years | 1,575 | 8,110 | 16,802
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions | 431 | 694 | 9,005
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | (9,174) | (28,976) | (31,013)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations | (6,111) | (1,445) | (1,223)
Balance, end of period | $ 16,993 | $ 30,272 | $ 51,889

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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 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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