Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 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 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 September 30, 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”) No. 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. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, which delayed the effective date of ASU No. 2014-09 by one year. ASU No. 2014-09 is effective for the Company beginning on January 1, 2018. Early adoption is permitted for reporting periods beginning after December 15, 2016. The standard permits the use of either either the full retrospective approach or the modified retrospective approach. 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. In April 2015, the FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs, which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The standard is effective for the Company beginning on January 1, 2016. Early adoption is permitted for financial statements that have not been previously issued. This standard is to be applied on a retrospective basis and represents a change in accounting principle. The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures. In August 2015, the FASB issued ASU No. 2015-15, Interest — Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements — Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting, which clarifies the treatment of debt issuance costs from line-of-credit arrangements after the adoption of ASU No. 2015-03. The standard clarifies that the SEC staff would not object to an entity deferring and presenting debt issuance costs related to a line-of-credit arrangement as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of such arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments, as part of its simplification initiative. Under the standard, adjustments to provisional amounts identified during the measurement period should be recognized in the reporting period in which the adjustments are determined. The portion of the amount recorded in current-period earnings that would have been recorded in previous reporting periods if the adjustment to the provisional amounts were recognized at the acquisition date should be presented separately, by line item, on the face of the income statement or disclosed in the notes. The standard is effective for the Company beginning on January 1, 2016. The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures.