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Owned Inventory - Narrative (Details) | 3 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) home | Dec. 31, 2022 USD ($) | Sep. 30, 2023 USD ($) home
Inventory Disclosure [Abstract] |  |  |
Number of homes under construction | home | 2,495 |  | 2,163
Number of homes under construction, spec homes | home | 982 |  | 779
Total, spec homes | $ 292,400,000 |  | $ 218,000,000
Number of homes under construction, in-process spec homes | home | 789 |  | 645
In-process spec homes | $ 211,700,000 |  | $ 162,000,000
Number of homes under construction, finished spec homes | home | 193 |  | 134
Finished spec homes | $ 80,700,000 |  | $ 56,000,000
Threshold number of homes below a minimum threshold of profitability | home | 10 |  |
Impairment of projects in process | $ 0 | $ 0 |
Total impairment charges on land held for sale | 0 | 0 |
Total abandonments charges | $ 0 | $ 190,000 |

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