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Note 20 - Investments in Unconsolidated Homebuilding and Land Development Joint Ventures (Details Textual) $ in Thousands	3 Months Ended									12 Months Ended
	Oct. 31, 2020 USD ($)	Jul. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Jan. 31, 2020 USD ($)	Oct. 31, 2019 USD ($)	Jul. 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Jan. 31, 2019 USD ($)	Jan. 31, 2018 USD ($)	Oct. 31, 2020 USD ($)	Oct. 31, 2019 USD ($)	Oct. 31, 2018 USD ($)
Fair Value of Assets Acquired									$ 13,000
Number of Owned Communities Transferred to the Joint Venture				8		1
Proceeds from Transfer of Land to Joint Venture				$ 29,800		$ 15,900
Number of Owned Active Communities Transferred to the Joint Venture				4
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Total	$ 103,164				$ 127,038					$ 103,164	$ 127,038
Equity Method Investment, Other than Temporary Impairment										0
Revenues, Total	$ 683,358	$ 628,136	$ 538,351	$ 494,056	713,590	$ 482,041	$ 440,691	$ 380,594		$ 2,343,901	2,016,916	$ 1,991,233
Joint Venture Total Debt to Capitalization Ratio	35.00%									35.00%
Joint Ventures in West [Member]
Equity Method Investment, Other than Temporary Impairment											900
Homebuilding [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Total	$ 103,164				127,038					$ 103,164	127,038
Revenues, Total										2,271,739	1,962,764	1,937,878
Homebuilding [Member] | Management Fees [Member]
Revenues, Total										16,000	16,900	$ 21,100
Corporate Joint Venture [Member]
Due to Affiliate	$ 1,100									$ 1,100
Advances to Affiliate					$ 1,400						$ 1,400

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