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Summary of Significant Accounting Policies (Details) (USD $) Share data in Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Sep. 30, 2014 home state | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Number of states with active operations | 16 |  |  |
Threshold Number of Homes Below a Minimum Threshold of Profitability | 10 |  |  |
Measurement threshold of likelihood of being realized (percent) | 50.00% |  |  |
Other Liabilities [Abstract] |  |  |  |
Income tax liabilities | $ 5,576,000 | $ 20,170,000 |  |
Accrued warranty expenses | 16,084,000 | 11,663,000 | 15,477,000 | 17,916,000
Accrued interest | 34,645,000 | 33,372,000 |  |
Accrued and deferred compensation | 24,270,000 | 25,579,000 |  |
Customer deposits | 11,977,000 | 11,408,000 |  |
Other | 49,964,000 | 43,431,000 |  |
Total | 142,516,000 | 145,623,000 |  |
Advertising costs | $ 17,800,000 | $ 14,200,000 | $ 13,500,000 |
Minimum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Time to develop, sell, construct and close all houses in typical community | 3 years |  |  |
Other Liabilities [Abstract] |  |  |  |
Estimated future warranty costs as a percentage or revenue (percent) | 0.10% |  |  |
Maximum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Time to develop, sell, construct and close all houses in typical community | 5 years |  |  |
Other Liabilities [Abstract] |  |  |  |
Estimated future warranty costs as a percentage or revenue (percent) | 2.10% |  |  |
Buildings | Minimum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life | 25 years |  |  |
Buildings | Maximum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life | 30 years |  |  |
Information systems | Maximum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life | 5 years |  |  |
Furniture, Fixtures, Computer and Office Equipment | Minimum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life | 3 years |  |  |
Furniture, Fixtures, Computer and Office Equipment | Maximum |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life | 7 years |  |  |
SSARs and Stock Options |  |  |  |
Other Liabilities [Abstract] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (shares) | 0.7 |  |  |
Equity Unit Purchase Agreements |  |  |  |
Other Liabilities [Abstract] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (shares) | 5.2 |  |  |

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