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.

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Name:	us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Investments in Unconsolidated Joint Ventures (Information for Investments in Unconsolidated Joint Ventures) (Details)	3 Months Ended		9 Months Ended
	Aug. 31, 2021 home joint_venture	Aug. 31, 2020 home	Aug. 31, 2021 home joint_venture	Aug. 31, 2020 home	Nov. 30, 2020 joint_venture
Schedule of Equity Method Investments [Line Items]
Number of investments in unconsolidated joint ventures \| joint_venture	6		6		5
Unconsolidated Joint Venture in California [Member]
Schedule of Equity Method Investments [Line Items]
Number of homes delivered \| home	0	17	10	90