Basis of Presentation (Policies) |
9 Months Ended |
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Jun. 30, 2025 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Basis of Accounting, Policy [Policy Text Block] | The accompanying unaudited consolidated financial statements include the accounts of Forestar Group Inc. ("Forestar") and all of its 100% owned, majority-owned and controlled subsidiaries, which are collectively referred to as the Company unless the context otherwise requires. The Company accounts for its investment in other entities in which it has significant influence over operations and financial policies using the equity method. All intercompany accounts, transactions and balances have been eliminated in consolidation. Noncontrolling interests in consolidated pass-through entities are recognized before income taxes. Net income attributable to noncontrolling interests is zero for all periods presented in the Company's statements of operations. The transactions included in net income in the consolidated statements of operations are the same as those that would be presented in comprehensive income. Thus, the Company's net income equates to comprehensive income. The financial statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. In the opinion of management, these financial statements reflect all adjustments considered necessary to fairly state the results for the interim periods shown, including normal recurring accruals and other items. These financial statements, including the consolidated balance sheet as of September 30, 2024, which was derived from audited financial statements, do not include all of the information and notes required by GAAP for complete financial statements, and should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s annual report on Form 10-K for the fiscal year ended September 30, 2024. In October 2017, Forestar became a majority-owned subsidiary of D.R. Horton, Inc. ("D.R. Horton") by virtue of a merger with a wholly-owned subsidiary of D.R. Horton. Immediately following the merger, D.R. Horton owned 75% of the Company's outstanding common stock. In connection with the merger, the Company entered into certain agreements with D.R. Horton, including a Stockholder’s Agreement, a Master Supply Agreement and a Shared Services Agreement. D.R. Horton is considered a related party of Forestar under GAAP. As of June 30, 2025, D.R. Horton owned approximately 62% of the Company's outstanding common stock.
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| Use of Estimates, Policy [Policy Text Block] | Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from those estimates. Seasonality Although the growth of the Company's business and significant changes in market conditions have impacted its seasonal patterns in the past and could do so again in the future, the Company generally delivers more lots and generates greater revenues and pre-tax income in the fourth quarter of its fiscal year. As a result of seasonal activity, the Company's quarterly results of operations and financial position at the end of a particular fiscal quarter are not necessarily representative of the balance of its fiscal year.
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| New Accounting Pronouncements, Policy [Policy Text Block] | Pending Accounting Standards In November 2023, the Financial Accounting Standards Board (FASB) issued ASU 2023-07, "Segment Reporting - Improvements to Reportable Segment Disclosures," which is intended to improve reportable segment disclosures. The ASU expands public entities’ segment disclosures by requiring disclosure of significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss. It also requires disclosure of the amount and description of the composition of other segment items and interim disclosures of a reportable segment’s profit or loss and assets. The standard is effective for the Company's annual periods beginning in fiscal 2025 and interim periods beginning in the first quarter of fiscal 2026 on a retrospective basis to all periods presented. This standard will impact the Company's disclosures but will not impact its consolidated financial statements. In December 2023, the FASB issued ASU 2023-09, "Income Taxes - Improvements to Income Tax Disclosures," which requires disclosure of disaggregated income taxes paid, prescribes standard categories for the components of the effective tax rate reconciliation and modifies other income tax related disclosures. The guidance is effective for the Company beginning October 1, 2025, with early adoption permitted. The Company is currently evaluating the impact of this guidance on its consolidated financial statements and related disclosures. In November 2024, the FASB issued ASU 2024-03, "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures," which requires disclosure of certain costs and expenses on an interim and annual basis in the notes to the financial statements. The standard is effective for the Company's annual periods beginning in fiscal 2028 and interim periods beginning in the first quarter of fiscal 2029, with early adoption permitted. The Company is currently evaluating the impact on its disclosures.
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