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Inventory - Results of Discounted Cash Flow Analysis (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2013 | Mar. 31, 2012 lot Community
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  |  |  | 2
Number of lots impaired |  |  |  | 76
Impairment Charges |  |  |  | $ 3,151
Estimated fair value of impaired inventory |  |  |  | 9,669
Continuing Operations |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  |  |  | 2
Number of lots impaired |  |  |  | 76
Impairment Charges | 0 | 849 | 59 | 3,133
Estimated fair value of impaired inventory |  |  |  | 9,669
Continuing Operations | West Segment |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  |  |  | 1
Number of lots impaired |  |  |  | 51
Impairment Charges | 0 | 202 | 46 | 2,198
Estimated fair value of impaired inventory |  |  |  | 6,377
Continuing Operations | East Segment |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  |  |  | 1
Number of lots impaired |  |  |  | 25
Impairment Charges | 0 | 565 | 13 | 687
Estimated fair value of impaired inventory |  |  |  | 3,292
Continuing Operations | Southeast Segment |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  |  |  | 0
Number of lots impaired |  |  |  | 0
Impairment Charges | 0 | 46 | 0 | 164
Estimated fair value of impaired inventory |  |  |  | 0
Continuing Operations | Unallocated |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  |  |  | 0
Number of lots impaired |  |  |  | 0
Impairment Charges | 0 | 36 | 0 | 84
Estimated fair value of impaired inventory |  |  |  | 0
Discontinued Operations |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  |  |  | 0
Number of lots impaired |  |  |  | 0
Impairment Charges | 0 | 2 | 0 | 18
Estimated fair value of impaired inventory |  |  |  | 0
Discounted Cash Flow Analysis [Member] |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  | 1 |  |
Number of lots impaired |  | 25 |  |
Impairment Charges |  | 851 |  |
Estimated fair value of impaired inventory |  | 3,292 |  |
Discounted Cash Flow Analysis [Member] | Continuing Operations |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  | 1 |  |
Number of lots impaired |  | 25 |  |
Impairment Charges |  | 849 |  |
Estimated fair value of impaired inventory |  | 3,292 |  |
Discounted Cash Flow Analysis [Member] | Continuing Operations | West Segment |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  | 0 |  |
Number of lots impaired |  | 0 |  |
Impairment Charges |  | 202 |  |
Estimated fair value of impaired inventory |  | 0 |  |
Discounted Cash Flow Analysis [Member] | Continuing Operations | East Segment |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  | 1 |  |
Number of lots impaired |  | 25 |  |
Impairment Charges |  | 565 |  |
Estimated fair value of impaired inventory |  | 3,292 |  |
Discounted Cash Flow Analysis [Member] | Continuing Operations | Southeast Segment |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  | 0 |  |
Number of lots impaired |  | 0 |  |
Impairment Charges |  | 46 |  |
Estimated fair value of impaired inventory |  | 0 |  |
Discounted Cash Flow Analysis [Member] | Continuing Operations | Unallocated |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  | 0 |  |
Number of lots impaired |  | 0 |  |
Impairment Charges |  | 36 |  |
Estimated fair value of impaired inventory |  | 0 |  |
Discounted Cash Flow Analysis [Member] | Discontinued Operations |  |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |  |
Number of communities impaired |  | 0 |  |
Number of lots impaired |  | 0 |  |
Impairment Charges |  | 2 |  |
Estimated fair value of impaired inventory |  | $ 0 |  |

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