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Inventory - Summary of Interests in Lot Option Agreements (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Sep. 30, 2012
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Real Estate Properties [Line Items] |  |  |  |
Deposits and non-refundable preacquisition costs incurred | $ 25,022 |  | $ 24,923 |
Remaining obligations | 206,904 |  | 198,498 |
Land not owned under option agreements | 8,375 |  | 12,420 |
Consolidated VIEs |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Deposits and non-refundable preacquisition costs incurred | 4,899 |  | 7,203 |
Remaining obligations | 2,650 |  | 3,346 |
Land not owned under option agreements | 7,549 |  | 10,549 |
Other consolidated lot option agreements |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Deposits and non-refundable preacquisition costs incurred | 190 | [1] | 430 | [1]
Remaining obligations | 636 | [1] | 1,441 | [1]
Land not owned under option agreements | 826 | [1] | 1,871 | [1]
Unconsolidated lot option agreements |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Deposits and non-refundable preacquisition costs incurred | 19,933 |  | 17,290 |
Remaining obligations | 203,618 |  | 193,711 |
Land not owned under option agreements | $ 0 |  | $ 0 |
[1] | Represents lot option agreements with non-VIE entities that we have deemed to be “financing arrangements” pursuant to ASC 470-40, Product Financing Arrangements.

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- Definition Land Under Purchase Options, Consolidated and Unconsolidated VIEs, Total Remaining Obligations Under Option Agreements + References No definition available. + Details
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- Definition Land Under Purchase Options, Deposits and Non-refundable Preacquisition Costs + References No definition available. + Details
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- Definition The carrying amount as of the balance sheet date of land not owned but under a contract in which the entity has an option to purchase the land. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 67 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 46R -Paragraph 23 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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