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Inventory - Narrative (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 31, 2016 USD ($) home Community | Dec. 31, 2015 Community | Sep. 30, 2016 USD ($) home
Real Estate [Abstract] |  |  |
Number of substantially completed homes unsold | home | 162 |  | 178
Total value of substantially completed homes | $ | $ 47.1 |  | $ 56.1
Threshold number of homes below a minimum threshold of profitability | home | 10 |  |
Real Estate Properties [Line Items] |  |  |
Number of communities on watch list | 8 | 0 |
West Segment |  |  |
Real Estate Properties [Line Items] |  |  |
Number of communities on watch list | 7 |  |
East Segment |  |  |
Real Estate Properties [Line Items] |  |  |
Number of communities on watch list | 1 |  |

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- Definition Number of Communities on Watch List + References No definition available. + Details
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- Definition Number of Real Estate Properties, Completed Homes Unsold + References No definition available. + Details
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- Definition Value of Real Estate Properties, Completed Unsold Homes + References No definition available. + Details
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- Details
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- Details
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