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Related Party Disclosures (Tables) | 12 Months Ended
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Sep. 30, 2025
Related Party Transactions [Abstract] |
Schedule of Related Party Transactions [Table Text Block] | At September 30, 2025 and 2024, the Company owned approximately 65,100 and 57,800 residential lots, of which D.R. Horton had the following involvement.
| September 30,
| 2025 |  | 2024
| (Dollars in millions)
Residential lots under contract to sell to D.R. Horton | 22,800 |  |  | 20,500 |
Owned lots subject to right of first offer with D.R. Horton based on executed purchase and sale agreements | 17,600 |  |  | 17,200 |
Earnest money deposits from D.R. Horton for lots under contract | $ | 179.7 |  |  | $ | 168.4 |
Remaining sales price of lots under contract with D.R. Horton | $ | 2,000.0 |  |  | $ | 1,840.5 |
Lot and land sales to D.R. Horton during fiscal years 2025, 2024 and 2023 were as follows:
| Year Ended September 30,
| 2025 |  | 2024 |  | 2023
| (Dollars in millions)
Residential lots sold to D.R. Horton | 11,751 |  |  | 13,267 |  |  | 12,249 |
Residential lot sales revenues from sales to D.R. Horton | $ | 1,277.6 |  |  | $ | 1,271.4 |  |  | $ | 1,094.7 |
Decrease in contract liabilities on lot sales to D.R. Horton | $ | 1.1 |  |  | $ | 2.9 |  |  | $ | — |
Tract sales and other revenues from D.R. Horton | $ | 99.5 |  |  | $ | 23.7 |  |  | $ | 115.1 |

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 + Details
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