Owned Inventory - Total Owned Inventory by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Segment Reporting Information [Line Items]
Projects in progress	$ 1,916,258	$ 1,717,745
Land held for future development	19,879	19,879
Land held for sale	17,461	18,579
Total owned inventory	1,953,598	1,756,203
Corporate and unallocated
Segment Reporting Information [Line Items]
Projects in progress	193,511	180,300
Land held for future development	0	0
Land held for sale	0	0
Total owned inventory	193,511	180,300
West \| Operating Segments
Segment Reporting Information [Line Items]
Projects in progress	1,031,135	914,908
Land held for future development	3,483	3,483
Land held for sale	13,303	14,702
Total owned inventory	1,047,921	933,093
East \| Operating Segments
Segment Reporting Information [Line Items]
Projects in progress	371,485	325,395
Land held for future development	10,888	10,888
Land held for sale	3,482	3,201
Total owned inventory	385,855	339,484
Southeast \| Operating Segments
Segment Reporting Information [Line Items]
Projects in progress	320,127	297,142
Land held for future development	5,508	5,508
Land held for sale	676	676
Total owned inventory	$ 326,311	$ 303,326

Carrying amount as of the balance sheet date of project in progress

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- Definition

Carrying amount as of the balance sheet date of parcels of land held for sale, and on which the entity has no intention or no further intention to perform construction activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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- Definition

The net carrying amount as of the balance sheet date of the sum of the various components of an operative builder's inventory, including finished homes. Operative builders primarily consist of entities that develop land, construct residential homes and commercial and industrial buildings thereon, and sell them to home buyers and operators of the commercial and industrial properties.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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- Definition

Carrying amount of land available for development.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(d))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

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- Definition

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.

+ References

No definition available.

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