Basis of Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Basis of Consolidation	Basis of Consolidation. These unaudited consolidated financial statements present the consolidated financial position, income, comprehensive income and cash flows of the Company and our subsidiaries. Intercompany balances have been eliminated in consolidation.
Use of Estimates	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	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 in our 2015 Annual Report. Our homebuilding inventories that are accounted for as held for development 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.
New Accounting Pronouncements	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. 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, but we have the option of adopting the new requirements as of an earlier date. 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 adoption of this guidance.

Disclosure of accounting policy for major classes of inventories, bases of stating inventories (for example, lower of cost or market), methods by which amounts are added and removed from inventory classes (for example, FIFO, LIFO, or average cost), loss recognition on impairment of inventories, and situations in which inventories are stated above cost. If inventory is carried at cost, this disclosure includes the nature of the cost elements included in inventory.