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Fair Value Disclosures (Level 4 Inv Impair inputs) (Details 2) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2021 USD ($) Homes_sold | Oct. 31, 2020 USD ($) | Jul. 31, 2020 USD ($) | Apr. 30, 2020 USD ($) | Jan. 31, 2020 USD ($) | Oct. 31, 2020 USD ($) numberOfCommunities
Fair value inputs, assets, quantitative information [Line Items] |  |  |  |  |  |
Inventory Write-down | $ 1,267 |  |  |  | $ 1,031 |
Fair Value, Nonrecurring [Member] | Land Owned for Future Communities [Member] |  |  |  |  |  |
Fair value inputs, assets, quantitative information [Line Items] |  |  |  |  |  |
Inventory Write-down |  |  |  |  |  | $ 31,700
Number of Communities Impaired (in ones) | numberOfCommunities |  |  |  |  |  | 9
Fair Value Of Communities Net Of Impairment Charges |  | $ 21,800 |  |  |  | $ 21,800
Minimum [Member] | Land Owned for Future Communities [Member] |  |  |  |  |  |
Fair value inputs, assets, quantitative information [Line Items] |  |  |  |  |  |
Sales Price Per Lot |  |  |  |  |  | 33
Maximum [Member] | Land Owned for Future Communities [Member] |  |  |  |  |  |
Fair value inputs, assets, quantitative information [Line Items] |  |  |  |  |  |
Sales Price Per Lot |  |  |  |  |  | 180
Operating communities [Member] |  |  |  |  |  |
Fair value inputs, assets, quantitative information [Line Items] |  |  |  |  |  |
Inventory Write-down | 1,100 |  |  |  |  | $ 675
Operating communities [Member] | Minimum [Member] |  |  |  |  |  |
Fair value inputs, assets, quantitative information [Line Items] |  |  |  |  |  |
Average selling price | $ 2,003 |  |  | $ 613 |  |
Sales Pace (in ones) | 2 |  |  | 9 |  |
Fair Value Inputs, Discount Rate | 14.30% |  |  | 14.30% |  |
Operating communities [Member] | Maximum [Member] |  |  |  |  |  |
Fair value inputs, assets, quantitative information [Line Items] |  |  |  |  |  |
Average selling price | $ 2,003 |  |  | $ 789 |  |
Sales Pace (in ones) | 2 |  |  | 9 |  |
Fair Value Inputs, Discount Rate | 14.30% |  |  | 14.30% |  |

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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. + References No definition available. + Details
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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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