Basis of Presentation and Summary of Significant Accounting Policies	6 Months Ended
Mar. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Such unaudited financial statements do not include all of the information and disclosures required by GAAP for complete financial statements. In our opinion, all adjustments (consisting primarily of normal recurring adjustments) necessary for a fair presentation have been included in the accompanying unaudited financial statements. The results of our consolidated operations presented herein for the three and six months ended March 31, 2016 are not necessarily indicative of the results to be expected for the full year due to seasonal variations in our operations and other items. For further information and a discussion of our significant accounting policies other than as discussed below, refer to Note 2 to the audited consolidated financial statements within our 2015 Annual Report. Over the past few years, we have discontinued homebuilding operations in certain markets. Results from certain of these exited markets are reported as discontinued operations in the accompanying unaudited consolidated statements of income for all periods presented (see Note 16 for further discussion of our discontinued operations). We evaluated events that occurred after the balance sheet date but before the financial statements were issued for accounting treatment and disclosure. Our fiscal 2016 began on October 1, 2015 and ends on September 30, 2016. Our fiscal 2015 began on October 1, 2014 and ended on September 30, 2015. Our fiscal 2014 began on October 1, 2013 and ended on September 30, 2014. Basis of Consolidation. These unaudited consolidated financial statements present the consolidated financial position, income, comprehensive income and cash flows of the Company, including its subsidiaries. Intercompany balances have been eliminated in consolidation. Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make informed estimates and judgments that affect the amounts reported in the unaudited consolidated financial statements and accompanying notes. Accordingly, actual results could differ from these estimates. Inventory Valuation. We assess our inventory assets no less than quarterly for recoverability in accordance with the policies described in Notes 2 and 5 to the audited consolidated financial statements within our 2015 Annual Report. Our homebuilding inventories that are accounted for as held for development (development projects in progress) include land and home construction assets grouped together as communities. Homebuilding inventories held for development are stated at cost (including direct construction costs, capitalized indirect costs, capitalized interest and real estate taxes) unless facts and circumstances indicate that the carrying value of the assets may not be recoverable. For those communities that have been idled (land held for future development), all applicable interest and real estate taxes are expensed as incurred, and the inventory is stated at cost unless facts and circumstances indicate that the carrying value of the assets may not be recoverable. We record assets held for sale at the lower of the carrying value or fair value less costs to sell. Recent Accounting Pronouncements. Revenue from Contracts with Customers. In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (ASU 2014-09). ASU 2014-09 requires entities to recognize revenue at an amount that the entity expects to be entitled to upon transferring control of goods or services to a customer, as opposed to when risks and rewards transfer to a customer under the existing revenue recognition guidance. In August 2015, the FASB issued ASU 2015-14 to defer the effective date of ASU 2014-09 for one year, which makes the guidance effective for the Company's first fiscal year beginning after December 15, 2017. Additionally, the FASB is permitting entities to early adopt the standard, which allows for either full retrospective or modified retrospective methods of adoption, for reporting periods beginning after December 15, 2016. We are currently evaluating the impact of ASU 2014-09 on our consolidated financial statements and have been involved in industry-specific discussions with the FASB on the treatment of certain items. Presentation of Debt Issuance Costs. In April 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs (ASU 2015-03). ASU 2015-03 requires debt issuance costs to be presented on the balance sheet as a direct deduction from the related debt liability, similar to the presentation of debt discounts or premiums. Additionally, in August 2015, the FASB issued related guidance in ASU 2015-15 pertaining to debt issuance costs incurred in connection with line-of-credit arrangements, which states that an objection would not be made to an entity deferring such costs and continuing to present them as an asset until the costs are amortized ratably over the term of the line-of-credit agreement. In all cases, debt issuance costs will continue to be amortized to interest expense. ASU 2015-03 requires retrospective application to all prior periods presented in the financial statements. Upon transition, an entity is required to comply with the applicable disclosures for a change in accounting principle. The guidance within ASU 2015-03 will be effective for the Company's first fiscal year beginning after December 15, 2015. Early adoption is permitted for financial statements that have not been previously issued. We only expect our balance sheet presentation of debt issuance costs that are not related to line-of-credit agreements to change as a result of the adoption of this guidance. Leases. In February 2016, the FASB issued ASU 2016-02, Leases (ASU 2016-02). ASU 2016-02 requires lessees to record most leases on their balance sheets. The timing and classification of lease-related expenses for lessees will depend on whether a lease is determined to be a finance lease or an operating lease using updated criteria within ASU 2016-02. Operating leases will result in straight-line expense (similar to current operating leases), while finance leases will result in a front-loaded expense pattern (similar to current capital leases). Regardless of lease type, the lessee will recognize a right-of-use asset, representing the right to use the identified asset during the lease term, and a related lease liability, representing the present value of the lease payments over the lease term. Lessor accounting will be largely similar to that under the current lease accounting rules. The guidance within ASU 2016-02 will be effective for the Company's first fiscal year beginning after December 15, 2018, with early adoption permitted. ASU 2016-02 must be adopted using a modified retrospective approach, which requires application of the standard at the beginning of the earliest comparative period presented, with certain optional practical expedients. ASU 2016-02 also requires significantly enhanced disclosures around an entity's leases and the related accounting. We are currently evaluating the impact of ASU 2016-02 on our consolidated financial statements. Stock Compensation. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (ASU 2016-09). ASU 2016-09 simplifies several aspects of accounting for employee stock-based compensation transactions. First, ASU 2016-09 requires that all tax benefits and deficiencies related to share-based payments be recorded as income tax expense in the income statement, thereby eliminating the concept of the “APIC pool” contained in the current guidance. This change is required to be applied prospectively to all excess tax benefits (“windfalls”) and tax deficiencies (“shortfalls”) resulting from settlements after the date of the adoption of the ASU. Second, ASU 2016-09 permits entities to make an election to either estimate forfeitures or recognize them when they occur. If elected, the change to recognize forfeitures when they occur needs to be adopted using a modified retrospective approach, with a cumulative effect adjustment recorded to opening retained earnings. Third, ASU 2016-09 modifies the current exception to liability classification of an award when the employer withholds shares to meet tax withholding requirements. Finally, the classification of certain transactions related to share-based payments within the statement of cash flows is clarified within the ASU. The guidance within ASU 2016-09 will be effective for the Company's first fiscal year beginning after December 15, 2016. We are currently evaluating the impact of ASU 2016-09 on our consolidated financial statements.

Basis of Presentation and Summary of Significant Accounting Policies

The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Such unaudited financial statements do not include all of the information and disclosures required by GAAP for complete financial statements. In our opinion, all adjustments (consisting primarily of normal recurring adjustments) necessary for a fair presentation have been included in the accompanying unaudited financial statements. The results of our consolidated operations presented herein for the three and six months ended March 31, 2016 are not necessarily indicative of the results to be expected for the full year due to seasonal variations in our operations and other items. For further information and a discussion of our significant accounting policies other than as discussed below, refer to Note 2 to the audited consolidated financial statements within our 2015 Annual Report.

Over the past few years, we have discontinued homebuilding operations in certain markets. Results from certain of these exited markets are reported as discontinued operations in the accompanying unaudited consolidated statements of income for all periods presented (see Note 16 for further discussion of our discontinued operations).

We evaluated events that occurred after the balance sheet date but before the financial statements were issued for accounting treatment and disclosure.

Our fiscal 2016 began on October 1, 2015 and ends on September 30, 2016. Our fiscal 2015 began on October 1, 2014 and ended on September 30, 2015. Our fiscal 2014 began on October 1, 2013 and ended on September 30, 2014.

Basis of Consolidation. These unaudited consolidated financial statements present the consolidated financial position, income, comprehensive income and cash flows of the Company, including its subsidiaries. Intercompany balances have been eliminated in consolidation.

Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make informed estimates and judgments that affect the amounts reported in the unaudited consolidated financial statements and accompanying notes. Accordingly, actual results could differ from these estimates.

Inventory Valuation. We assess our inventory assets no less than quarterly for recoverability in accordance with the policies described in Notes 2 and 5 to the audited consolidated financial statements within our 2015 Annual Report. Our homebuilding inventories that are accounted for as held for development (development projects in progress) include land and home construction assets grouped together as communities. Homebuilding inventories held for development are stated at cost (including direct construction costs, capitalized indirect costs, capitalized interest and real estate taxes) unless facts and circumstances indicate that the carrying value of the assets may not be recoverable. For those communities that have been idled (land held for future development), all applicable interest and real estate taxes are expensed as incurred, and the inventory is stated at cost unless facts and circumstances indicate that the carrying value of the assets may not be recoverable. We record assets held for sale at the lower of the carrying value or fair value less costs to sell.

Recent Accounting Pronouncements.

Revenue from Contracts with Customers. In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (ASU 2014-09). ASU 2014-09 requires entities to recognize revenue at an amount that the entity expects to be entitled to upon transferring control of goods or services to a customer, as opposed to when risks and rewards transfer to a customer under the existing revenue recognition guidance. In August 2015, the FASB issued ASU 2015-14 to defer the effective date of ASU 2014-09 for one year, which makes the guidance effective for the Company's first fiscal year beginning after December 15, 2017. Additionally, the FASB is permitting entities to early adopt the standard, which allows for either full retrospective or modified retrospective methods of adoption, for reporting periods beginning after December 15, 2016. We are currently evaluating the impact of ASU 2014-09 on our consolidated financial statements and have been involved in industry-specific discussions with the FASB on the treatment of certain items.

Presentation of Debt Issuance Costs. In April 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs (ASU 2015-03). ASU 2015-03 requires debt issuance costs to be presented on the balance sheet as a direct deduction from the related debt liability, similar to the presentation of debt discounts or premiums. Additionally, in August 2015, the FASB issued related guidance in ASU 2015-15 pertaining to debt issuance costs incurred in connection with line-of-credit arrangements, which states that an objection would not be made to an entity deferring such costs and continuing to present them as an asset until the costs are amortized ratably over the term of the line-of-credit agreement. In all cases, debt issuance costs will continue to be amortized to interest expense. ASU 2015-03 requires retrospective application to all prior periods presented in the financial statements. Upon transition, an entity is required to comply with the applicable disclosures for a change in accounting principle. The guidance within ASU 2015-03 will be effective for the Company's first fiscal year beginning after December 15, 2015. Early adoption is permitted for financial statements that have not been previously issued. We only expect our balance sheet presentation of debt issuance costs that are not related to line-of-credit agreements to change as a result of the adoption of this guidance.

Leases. In February 2016, the FASB issued ASU 2016-02, Leases (ASU 2016-02). ASU 2016-02 requires lessees to record most leases on their balance sheets. The timing and classification of lease-related expenses for lessees will depend on whether a lease is determined to be a finance lease or an operating lease using updated criteria within ASU 2016-02. Operating leases will result in straight-line expense (similar to current operating leases), while finance leases will result in a front-loaded expense pattern (similar to current capital leases). Regardless of lease type, the lessee will recognize a right-of-use asset, representing the right to use the identified asset during the lease term, and a related lease liability, representing the present value of the lease payments over the lease term. Lessor accounting will be largely similar to that under the current lease accounting rules. The guidance within ASU 2016-02 will be effective for the Company's first fiscal year beginning after December 15, 2018, with early adoption permitted. ASU 2016-02 must be adopted using a modified retrospective approach, which requires application of the standard at the beginning of the earliest comparative period presented, with certain optional practical expedients. ASU 2016-02 also requires significantly enhanced disclosures around an entity's leases and the related accounting. We are currently evaluating the impact of ASU 2016-02 on our consolidated financial statements.

Stock Compensation. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (ASU 2016-09). ASU 2016-09 simplifies several aspects of accounting for employee stock-based compensation transactions. First, ASU 2016-09 requires that all tax benefits and deficiencies related to share-based payments be recorded as income tax expense in the income statement, thereby eliminating the concept of the “APIC pool” contained in the current guidance. This change is required to be applied prospectively to all excess tax benefits (“windfalls”) and tax deficiencies (“shortfalls”) resulting from settlements after the date of the adoption of the ASU. Second, ASU 2016-09 permits entities to make an election to either estimate forfeitures or recognize them when they occur. If elected, the change to recognize forfeitures when they occur needs to be adopted using a modified retrospective approach, with a cumulative effect adjustment recorded to opening retained earnings. Third, ASU 2016-09 modifies the current exception to liability classification of an award when the employer withholds shares to meet tax withholding requirements. Finally, the classification of certain transactions related to share-based payments within the statement of cash flows is clarified within the ASU. The guidance within ASU 2016-09 will be effective for the Company's first fiscal year beginning after December 15, 2016. We are currently evaluating the impact of ASU 2016-09 on our consolidated financial statements.