Basis of Presentation and Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The unaudited consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (“GAAP”) as set forth in the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”) and applicable regulations of the Securities and Exchange Commission (“SEC”), but do not include all of the information and footnotes required for complete financial statements. In the opinion of management, the accompanying condensed consolidated financial statements for the periods presented reflect all adjustments, of a normal, recurring nature, necessary to fairly state our financial position, results of operations and cash flows. These consolidated financial statements should be read in conjunction with our audited consolidated financial statements for the year ended December 31, 2014, included in our Annual Report on Form 10-K filed with the SEC on March 31, 2015. Our operating results for the three months ended March 31, 2015 are not necessarily indicative of the results that may be expected for any future periods. The consolidated financial statements include the historic accounts of JBGL and are consolidated with Green Brick beginning October 27, 2014. All intercompany balances and transactions have been eliminated in consolidation. Investments in which the Company directly or indirectly has an interest of more than 50 percent and/or is able to exercise control over the operations have been fully consolidated and noncontrolling interests are stated separately in the consolidated financial statements as required under the provisions of FASB ASC 810, Consolidations.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes, including the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates.
Noncontrolling Interests	Noncontrolling Interests We own 50% controlling interests in several builders. The financial statements of these builders are consolidated in our consolidated financial statements. The noncontrolling interests attributable to the 50% minority interests not owned by us are included as part of noncontrolling interests on the consolidated balance sheets.
Segment Reporting	Segment Information The Company’s operations are organized into two reportable segments: builder operations and land development. Builder operations consist of two operating segments: Texas and Georgia. In accordance with ASC 280, Segment Reporting, in determining the most appropriate reportable segments, we considered similar economic and other characteristics, geography including product types, production processes, average selling prices, gross profits, suppliers, land acquisition results, and underlying demand and supply.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, FASB issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The standard will replace most existing revenue recognition guidance in GAAP when it becomes effective. The standard is effective for the Company on January 1, 2017. Early adoption is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. In April 2015, the FASB proposed to defer the effective date of the standard by one year. If the proposal is approved, early adoption would be permitted as of the original effective date, and the standard would be effective for the Company beginning January 1, 2018. The Company has not yet selected a transition method and is currently evaluating the effect that the standard will have on its consolidated financial statements and related disclosures. In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis, which amends the consolidation requirements in ASC 810, primarily related to limited partnerships and VIEs. The standard is effective for the Company beginning on January 1, 2016. Early adoption is permitted. The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures.

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

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Disclosure of accounting policy for subsidiaries or other investments that are consolidated, including the accounting treatment for intercompany accounts or transactions and any noncontrolling interest.

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