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Note 12 - Reduction of Inventory to Fair Value - Inventory Impairments by Homebuilding Segment (Details) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2016 USD ($) | Oct. 31, 2015 USD ($) | Oct. 31, 2014 USD ($)
Dollar amount of impairment |  | $ 24.5 | $ 7.3 | $ 1.2
Homebuilding [Member] |  |  |  |
Number of communities (Dimensionless number) |  | 20 | 12 | 5
Dollar amount of impairment |  | $ 24.5 | $ 7.3 | $ 1.2
Pre-impairment value | [1] | $ 88.4 | $ 29.4 | $ 4.4
Homebuilding [Member] | Northeast [Member] |  |  |  |
Number of communities (Dimensionless number) |  | 5 | 2 | 2
Dollar amount of impairment |  | $ 9.5 | $ 0.8 | $ 0.3
Pre-impairment value | [1] | $ 33.8 | $ 0.9 | $ 0.6
Homebuilding [Member] | Mid-Atlantic [Member] |  |  |  |
Number of communities (Dimensionless number) |  |  | 1 |
Dollar amount of impairment |  |  | $ 0.9 |
Pre-impairment value | [1] |  | $ 2.5 |
Homebuilding [Member] | Midwest [Member] |  |  |  |
Number of communities (Dimensionless number) |  | 12 | 4 | 3
Dollar amount of impairment |  | $ 13.5 | $ 1.3 | $ 0.9
Pre-impairment value | [1] | $ 43.7 | $ 8.4 | $ 3.8
Homebuilding [Member] | Southeast [Member] |  |  |  |
Number of communities (Dimensionless number) |  | 3 | 4 |
Dollar amount of impairment |  | $ 1.5 | $ 2.5 |
Pre-impairment value | [1] | $ 10.9 | $ 10.1 |
Homebuilding [Member] | Southwest [Member] |  |  |  |
Number of communities (Dimensionless number) |  |  |  |
Dollar amount of impairment |  |  |  |
Pre-impairment value | [1] |  |  |
Homebuilding [Member] | West [Member] |  |  |  |
Number of communities (Dimensionless number) |  |  | 1 |
Dollar amount of impairment |  |  | $ 1.8 |
Pre-impairment value | [1] |  | $ 7.5 |
[1] | Represents carrying value, net of prior period impairments, if any, at the time of recording the applicable period's impairments.

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- Definition Represents the number of communities with impairment losses. + References No definition available. + Details
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- Definition Book value of inventory prior to current period impairment charge. + References No definition available. + Details
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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Details
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