Fair Value Disclosures (Level 4 inventory fv) (Details 3) $ in Thousands	3 Months Ended												12 Months Ended
	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