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Inventory - Results of Discounted Cash Flow Analysis (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2012 Communities lots | Sep. 30, 2011 Communities lots | Sep. 30, 2010 lots Communities
Real Estate, Write-down or Reserve [Line Items] |  |  |
Number of communities impaired | 5 | 19 | 29
Number of lots impaired | 246 | 1,223 | 1,895
Impairment Charges | $ 9,547 | $ 29,581 | $ 48,917
Estimated fair value of impaired inventory at period end | 20,857 | 49,759 | 72,806
Continuing Operations |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |
Number of communities impaired | 5 | 19 | 25
Number of lots impaired | 246 | 1,223 | 1,827
Impairment Charges | 9,487 | 29,305 | 47,673
Estimated fair value of impaired inventory at period end | 20,857 | 49,759 | 66,834
Continuing Operations | West |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |
Number of communities impaired | 2 | 12 | 14
Number of lots impaired | 116 | 859 | 618
Impairment Charges | 3,902 | 20,150 | 18,056
Estimated fair value of impaired inventory at period end | 11,058 | 33,066 | 38,830
Continuing Operations | East |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |
Number of communities impaired | 2 | 4 | 6
Number of lots impaired | 93 | 86 | 847
Impairment Charges | 4,316 | 1,611 | 18,703
Estimated fair value of impaired inventory at period end | 7,342 | 10,671 | 17,020
Continuing Operations | Southeast |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |
Number of communities impaired | 1 | 3 | 5
Number of lots impaired | 37 | 278 | 362
Impairment Charges | 796 | 5,182 | 7,510
Estimated fair value of impaired inventory at period end | 2,457 | 6,022 | 10,984
Continuing Operations | Unallocated |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |
Number of communities impaired | 0 | 0 | 0
Number of lots impaired | 0 | 0 | 0
Impairment Charges | 473 | 2,362 | 3,404
Estimated fair value of impaired inventory at period end | 0 | 0 | 0
Discontinued Operations |  |  |
Real Estate, Write-down or Reserve [Line Items] |  |  |
Number of communities impaired | 0 | 0 | 4
Number of lots impaired | 0 | 0 | 68
Impairment Charges | 60 | 276 | 1,244
Estimated fair value of impaired inventory at period end | $ 0 | $ 0 | $ 5,972

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