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Fair Value Disclosures (Level 4 inventory fv) (Details 3) $ in Thousands | 3 Months Ended | 12 Months Ended
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Oct. 31, 2021 USD ($) numberOfCommunities | Jul. 31, 2021 USD ($) numberOfCommunities | Apr. 30, 2021 USD ($) numberOfCommunities | Jan. 31, 2021 USD ($) numberOfCommunities | Oct. 31, 2020 USD ($) numberOfCommunities | Jul. 31, 2020 USD ($) numberOfCommunities | Apr. 30, 2020 USD ($) numberOfCommunities | Jan. 31, 2020 USD ($) numberOfCommunities | Oct. 31, 2019 USD ($) numberOfCommunities | Jul. 31, 2019 USD ($) numberOfCommunities | Apr. 30, 2019 USD ($) numberOfCommunities | Jan. 31, 2019 USD ($) numberOfCommunities | Oct. 31, 2021 USD ($) numberOfCommunities | Oct. 31, 2020 USD ($) numberOfCommunities | Oct. 31, 2019 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory impairments and write-offs |  |  |  |  |  |  |  |  |  |  |  |  | $ 26,535 | $ 55,883 | $ 42,360
Land Owned for Future Communities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory impairments and write-offs |  |  |  |  |  |  |  |  |  |  |  |  | 19,805 | 31,669 | 0
Minimum [Member] | Land Owned for Future Communities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales price per lot |  |  |  |  |  |  |  |  |  |  |  |  | $ 25 | $ 25 |
Fair Value, Nonrecurring [Member] | Land Owned for Future Communities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of communities impaired | numberOfCommunities |  |  |  |  |  |  |  |  |  |  |  |  | 6 | 9 |
Fair value of communities, net of impairment charges | $ 23,900 |  |  |  | $ 21,800 |  |  |  |  |  |  |  | $ 23,900 | $ 21,800 |
Inventory impairments and write-offs |  |  |  |  |  |  |  |  |  |  |  |  | 19,800 | 31,700 | 0
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 communities tested | numberOfCommunities | 21 | 18 | 27 | 53 | 53 | 66 | 80 | 65 | 71 | 69 | 64 | 49 |  |  |
Number of communities impaired | numberOfCommunities | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 7 | 3 | 6 | 5 |  |  |
Fair value of communities, net of impairment charges | $ 0 | $ 0 | $ 0 | $ 419 | $ 1,113 | $ 0 | $ 2,754 | $ 0 | $ 18,910 | $ 5,436 | $ 36,159 | $ 37,282 | 0 | 1,113 | 18,910
Inventory impairments and write-offs | $ 0 | $ 0 | $ 0 | $ 1,100 | $ 375 | $ 0 | $ 300 | $ 0 | $ 6,695 | $ 1,100 | $ 17,495 | $ 5,785 | $ 1,100 | $ 675 | $ 31,075

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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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