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Inventory - Results of Discounted Cash Flow Analysis (Details) $ in Thousands | 9 Months Ended
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Jun. 30, 2019 USD ($) lot Community
Real Estate, Write-down or Reserve [Line Items] |
Number of Communities Impaired | Community | 10
Number of Lots Impaired | lot | 854
Impairment Charge | $ 110,030
Estimated Fair Value of Impaired Inventory at time of Impairment | $ 84,982
Continuing Operations | West Segment |
Real Estate, Write-down or Reserve [Line Items] |
Number of Communities Impaired | Community | 9
Number of Lots Impaired | lot | 839
Impairment Charge | $ 92,912
Estimated Fair Value of Impaired Inventory at time of Impairment | $ 69,449
Continuing Operations | Southeast Segment |
Real Estate, Write-down or Reserve [Line Items] |
Number of Communities Impaired | Community | 1
Number of Lots Impaired | lot | 15
Impairment Charge | $ 858
Estimated Fair Value of Impaired Inventory at time of Impairment | $ 1,367
Corporate and unallocated | Continuing Operations |
Real Estate, Write-down or Reserve [Line Items] |
Number of Communities Impaired | Community | 0
Number of Lots Impaired | lot | 0
Impairment Charge | $ 16,260
Estimated Fair Value of Impaired Inventory at time of Impairment | $ 14,166

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