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Fair Value Disclosures (Level 4 inventory fv) (Details 3) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2019 USD ($) | Jul. 31, 2019 USD ($) | Apr. 30, 2019 USD ($) | Jan. 31, 2019 USD ($) | Oct. 31, 2018 USD ($) | Jul. 31, 2018 USD ($) | Apr. 30, 2018 USD ($) | Jan. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) | Jul. 31, 2017 USD ($) | Apr. 30, 2017 USD ($) | Jan. 31, 2017 USD ($) | Oct. 31, 2019 USD ($) | Oct. 31, 2018 USD ($) | Oct. 31, 2017 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory impairments and write-offs |  |  |  |  |  |  |  |  |  |  |  |  | $ 42,360 | $ 35,156 | $ 14,794
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Operating communities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Operating Communities Tested | 71 | 69 | 64 | 49 | 43 | 55 | 65 | 64 | 51 | 53 | 46 | 57 |  |  |
Number of Communities impaired | 7 | 3 | 6 | 5 | 6 | 5 | 4 | 5 | 1 | 4 | 6 | 2 |  |  |
Fair Value Of Communities Net Of Impairment Charges | $ 18,910 | $ 5,436 | $ 36,159 | $ 37,282 | $ 24,692 | $ 43,063 | $ 21,811 | $ 13,318 | $ 6,982 | $ 5,965 | $ 25,092 | $ 8,372 | 18,910 | 24,692 | 6,982
Inventory impairments and write-offs | $ 6,695 | $ 1,100 | $ 17,495 | $ 5,785 | $ 4,025 | $ 9,065 | $ 13,325 | $ 3,736 | $ 1,500 | $ 1,360 | $ 2,935 | $ 4,000 | $ 31,075 | $ 30,151 | $ 9,795

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- Definition For inventory impaired during the period, the net fair value of those properties after impairment. + References No definition available. + Details
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- Definition Number of communities for which the company recognized impairment charges. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116847112&loc=d3e4542-108314 + Details
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