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Income Taxes (Details Textual) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2018 USD ($) | Apr. 30, 2017 USD ($) | Apr. 30, 2018 USD ($) | Apr. 30, 2017 USD ($) | Oct. 31, 2019 | Oct. 31, 2017
Income Taxes (Textual) [Abstract] |  |  |  |  |  |
Income tax provision | $ 40,938,000 | $ 74,571,000 | $ 40,429,000 | $ 113,936,000 |  |
Effective Income Tax Rate Reconciliation, Percent | 26.80% | 37.40% | 14.20% | 36.90% |  |
Number of states | 20 |  | 20 |  |  |
Unrecognized Tax Benefits | $ 17,300,000 |  | $ 17,300,000 |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range Not Possible |  |  | During the next 12 months, it is reasonably possible that our unrecognized tax benefits will change, but we are not able to provide a range of such change. |  |  |
Corporate Taxes per the Tax Cuts and Jobs Acts (TCJA) [Abstract] |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 0.00 |  | $ (31,200,000.00) |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 23.30% |  | 23.30% |  |  | 35.00%
Subsequent Event [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  | 21.00% |
State and Local Jurisdiction [Member] |  |  |  |  |  |
Income Taxes (Textual) [Abstract] |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent |  |  | 7.10% | 6.50% |  |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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