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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, 2021
USD ($)
Oct. 31, 2020
USD ($)
Oct. 31, 2019
USD ($)
Dollar amount of impairment $ 2.0 $ 2.0 $ 2.7
Homebuilding [Member]      
Number of communities 3 2 6
Dollar amount of impairment $ 2.0 $ 2.0 $ 2.7
Pre-impairment value [1] $ 11.5 $ 4.8 $ 17.5
Homebuilding [Member] | Northeast [Member]      
Number of communities 0 0 2
Dollar amount of impairment $ 0.0 $ 0.0 $ 0.2
Pre-impairment value [1] $ 0.0 $ 0.0 $ 7.8
Homebuilding [Member] | Mid-Atlantic [Member]      
Number of communities 0 0 1
Dollar amount of impairment $ 0.0 $ 0.0 $ 0.3
Pre-impairment value [1] $ 0.0 $ 0.0 $ 1.7
Homebuilding [Member] | Midwest [Member]      
Number of communities 0 2 1
Dollar amount of impairment $ 0.0 $ 2.0 $ 1.4
Pre-impairment value [1] $ 0.0 $ 4.8 $ 4.6
Homebuilding [Member] | Southeast [Member]      
Number of communities 2 0 1
Dollar amount of impairment $ 1.2 $ 0.0 $ 0.7
Pre-impairment value [1] $ 9.2 $ 0.0 $ 2.2
Homebuilding [Member] | Southwest [Member]      
Number of communities 0 0 1
Dollar amount of impairment $ 0.0 $ 0.0 $ 0.1
Pre-impairment value [1] $ 0.0 $ 0.0 $ 1.2
Homebuilding [Member] | West [Member]      
Number of communities 1 0 0
Dollar amount of impairment $ 0.8 $ 0.0 $ 0.0
Pre-impairment value [1] $ 2.3 $ 0.0 $ 0.0
[1] Represents carrying value, net of prior period impairments, if any, at the time of recording the applicable period's impairments.