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v3.23.2

Basis of Presentation (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2023 USD ($) lot | Dec. 31, 2022 USD ($) lot | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($)
Entity Information [Line Items] |  |  |  |
Payments related to business acquisitions | $ |  |  | $ 202.0 | $ 271.5
Riggins Custom Homes |  |  |  |
Entity Information [Line Items] |  |  |  |
Payments related to business acquisitions | $ |  | $ 107.0 |  |
Business Acquisition, Number of Homes Acquired |  | 170 |  |
Business Acquisition, Number of Finished Lots Acquired |  | 3,000 |  |
Business Acquisition, Backlog Acquired |  | 100 |  |
Truland Homes |  |  |  |
Entity Information [Line Items] |  |  |  |
Payments related to business acquisitions | $ | $ 100.0 |  |  |
Business Acquisition, Number of Homes Acquired | 155 |  |  |
Business Acquisition, Number of Finished Lots Acquired | 620 |  |  |
Business Acquisition, Backlog Acquired | 55 |  |  |
Business Acquisition, Number of Controlled Lots Acquired through Land Purchase | 660 |  |  |
Forestar Group [Member] |  |  |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 63.00% |  | 63.00% |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 37.00% |  | 37.00% |
Entity Information [Line Items] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 63.00% |  | 63.00% |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 37.00% |  | 37.00% |

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