Green Brick Partners (GRBK) 10-Q 6 Nov 17 2017 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 01, 2017
Document And Entity Information [Abstract]
Entity Registrant Name	Green Brick Partners, Inc.
Entity Central Index Key	1,373,670
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		50,584,501

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 20,720	$ 35,157
Restricted cash	4,368	4,445
Accounts receivable	1,808	2,448
Inventory	478,369	410,297
Investment in unconsolidated entity	15,771	0
Property and equipment, net	681	892
Earnest money deposits	25,389	18,143
Deferred income tax assets, net	55,827	67,598
Other assets, net	3,575	2,004
Total assets	606,508	540,984
Liabilities and stockholders' equity
Accounts payable	16,221	15,113
Accrued expenses	16,555	14,290
Customer and builder deposits	22,756	14,088
Obligations related to land not owned under option agreements	7,527	10,060
Borrowings on lines of credit	95,000	75,000
Notes payable	10,204	10,948
Total liabilities	168,263	139,499
Commitments and contingencies (Note 12)	0	0
Stockholders’ equity
Common shares, $0.01 par value: 100,000,000 shares authorized; 50,584,501 and 48,955,909 issued and outstanding as of September 30, 2017 and December 31, 2016, respectively	506	490
Additional paid-in capital	289,610	273,149
Retained earnings	134,098	110,933
Total Green Brick Partners, Inc. stockholders’ equity	424,214	384,572
Noncontrolling interests	14,031	16,913
Total stockholders’ equity	438,245	401,485
Total liabilities and stockholders’ equity	$ 606,508	$ 540,984

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares outstanding (in shares)	50,584,501	48,955,909

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Sale of residential units	$ 108,437	$ 87,827	$ 302,179	$ 248,187
Sale of land and lots	5,269	3,843	15,815	12,377
Total revenues	113,706	91,670	317,994	260,564
Cost of residential units	84,752	68,350	237,066	195,001
Cost of land and lots	3,544	2,676	11,306	8,389
Total cost of sales	88,296	71,026	248,372	203,390
Total gross profit	25,410	20,644	69,622	57,174
Salary expense	(5,218)	(5,256)	(15,985)	(15,886)
Selling, general and administrative expense	(4,302)	(4,130)	(12,747)	(12,275)
Operating profit	15,890	11,258	40,890	29,013
Equity in income of unconsolidated entity	968	0	968	0
Other income, net	435	564	1,362	2,400
Income before provision for income taxes	17,293	11,822	43,220	31,413
Income tax provision	5,364	3,657	13,635	9,340
Net income	11,929	8,165	29,585	22,073
Less: net income attributable to noncontrolling interests	2,649	1,922	6,420	5,993
Net income attributable to Green Brick Partners, Inc.	$ 9,280	$ 6,243	$ 23,165	$ 16,080
Net income attributable to Green Brick Partners, Inc. per common share:
Basic (in dollars per share)	$ 0.19	$ 0.13	$ 0.47	$ 0.33
Diluted (in dollars per share)	$ 0.19	$ 0.13	$ 0.47	$ 0.33
Weighted average common shares used in the calculation of net income attributable to Green Brick Partners, Inc. per common share:
Weighted-average number of shares outstanding —basic (shares)	49,808	48,899	49,274	48,868
Weighted-average number of shares outstanding —diluted (shares)	49,892	48,907	49,347	48,871

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 29,585	$ 22,073
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization expense	238	199
Share-based compensation	2,242	980
Deferred income taxes, net	11,771	8,477
Equity in income of unconsolidated entities	(968)	0
Cash distributions of income from unconsolidated entities	259	0
Changes in operating assets and liabilities
Decrease in accounts receivable	640	1,247
Increase in inventory	(70,605)	(77,335)
(Increase) decrease in earnest money deposits	(7,246)	3,708
(Increase) decrease in other assets	(1,571)	866
(Decrease) increase in accounts payable	910	22,214
(Decrease) increase in accrued expenses	2,463	5,470
Increase in customer and builder deposits	8,668	8,380
Net cash used in operating activities	(23,614)	(3,721)
Cash flows from investing activities
Cash used in investment in unconsolidated entity	(241)	0
Acquisition of property and equipment	(27)	(343)
Net cash used in investing activities	(268)	(343)
Cash flows from financing activities
Borrowings from lines of credit	61,500	63,000
Proceeds from notes payable	0	1,425
Repayments of lines of credit	(41,500)	(29,000)
Repayments of notes payable	(744)	(1,870)
Withholdings of taxes from vesting of restricted stock awards	(586)	0
Contributions from noncontrolling interests	438	2,921
Distributions to noncontrolling interests	(9,740)	(9,130)
Net cash provided by financing activities	9,368	27,346
Net (decrease) increase in cash, cash equivalents and restricted cash	(14,514)	23,282
Cash, cash equivalents and restricted cash at beginning of period	39,602	21,301
Cash, cash equivalents and restricted cash at end of period	25,088	44,583
Supplemental disclosure of cash flow information:
Cash paid for interest, net of capitalized interest	0	0
Cash paid for taxes	2,872	1,037
Supplemental disclosure of noncash investing and financing activities:
Decrease in land not owned under option agreements	2,271	6,225
Equity issuance related to investment in unconsolidated entity	$ 14,623	$ 0

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Significant Accounting Policies	BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES When used in these notes, references to the “Company”, “Green Brick”, “we”, “us” or “our” refer to the combined company, which has been renamed Green Brick Partners, Inc. and its subsidiaries, resulting from the acquisition by BioFuel Energy Corp. and its then consolidated subsidiaries (“BioFuel”) of JBGL Builder Finance LLC and its consolidated subsidiaries and affiliated companies (collectively, “Builder Finance”), and JBGL Capital Companies (“Capital”), a combined group of commonly managed limited liability companies and partnerships (collectively with Builder Finance, “JBGL”) by means of a reverse recapitalization transaction on October 27, 2014. We are a uniquely structured company that combines residential land development and homebuilding. We acquire and develop land, provide land and construction financing to our controlled builders and participate in the profits of our controlled builders. Our core markets are in the high growth U.S. metropolitan areas of Dallas, Texas and Atlanta, Georgia. We also own a noncontrolling interest in Challenger Homes in Colorado Springs, Colorado (see Note 3 for further discussion). We are engaged in all aspects of the homebuilding process, including land acquisition and development, entitlements, design, construction, marketing and sales and the creation of brand images at our residential neighborhoods and master planned communities. Condensed Basis of Presentation and Principles of Consolidation The unaudited condensed 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 condensed consolidated financial statements should be read in conjunction with our audited consolidated financial statements for the year ended December 31, 2016 , included in our Annual Report on Form 10-K filed with the SEC on March 13, 2017 . Our operating results for the three and nine months ended September 30, 2017 are not necessarily indicative of the results that may be expected for any future periods. 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 condensed consolidated financial statements as required under the provisions of ASC 810, Consolidations . The Company uses the equity method of accounting for its investment in an unconsolidated entity over which it exercises significant influence but do not have a controlling interest. Under the equity method, the Company’s share of the unconsolidated entity’s earnings or loss, if any, is included in the condensed consolidated statements of income. Use of Estimates The preparation of the condensed consolidated financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the amounts reported in the condensed 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 condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates. Noncontrolling Interests We own 50% controlling interests in several controlled builders. The financial statements of these controlled builders are consolidated in our condensed 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 condensed consolidated balance sheets. Segment Information Prior to the fourth quarter of 2016 , the Company’s operations were organized into two reportable segments: builder operations and land development. Builder operations consisted 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, including geography, product types, production processes, average selling prices, gross profits, suppliers, land acquisition results, and underlying demand and supply. In accordance with ASC 280, Segment Reporting , an operating segment is defined as a component of an enterprise for which discrete financial information is available and is reviewed regularly by the Chief Operating Decision Maker (“CODM”), or decision-making group, to evaluate performance and make operating decisions. The Company identified its CODM as three key executives—the Chief Executive Officer, the Chief Financial Officer and the Texas Region President (formerly, the Head of Land Acquisition and Development). In determining the most appropriate reportable segments, the CODM considered similar economic and other characteristics, including geography, class of customers, product types and production processes. During the fourth quarter of 2016 , the Company re-evaluated its reportable segments under ASC 280. As a result of the departure of the Chief Operating Officer in the fourth quarter of 2015, the management structure and CODM changed during 2016. The discrete financial information that is regularly reviewed by the current CODM group is different than in the past. As such, the builder operations reportable segment now consists of three operating segments. For the nine months ended September 30, 2017 , the Company’s operations are organized into two reportable segments: builder operations and land development. Builder operations consist of three operating segments: Texas, Georgia, and corporate and other. The operations of the Company's controlled builders were aggregated into the builder operations reporting segment because they have similar (1) economic characteristics; (2) housing products; (3) class of homebuyer; (4) regulatory environments; and (5) methods used to construct and sell homes. Corporate operations is a non-operating segment that develops and implements strategic initiatives and supports the Company’s builder operations and land development by centralizing certain administrative functions such as finance, treasury, information technology and human resources. The majority of corporate’s personnel and resources are primarily dedicated to activities relating to the builder operations segment. Therefore, any unallocated corporate expenses are included in the builder operations segment, within the “Corporate and other”, which accounts for 95.4% and 95.0% of total revenues for the three and nine months ended September 30, 2017 , respectively, and 96.1% and 95.3% of total revenues for the three and nine months ended September 30, 2016 , respectively. While Green Brick Title, LLC (“Green Brick Title”) operations are not economically similar to either builder operations or land development, it did not meet the quantitative thresholds, as discussed in ASC 280, to be separately reported and disclosed. As such, Green Brick Title’s results are included within the builder operations segment within the “Corporate and other” operating segment. All prior period segment information has been restated to conform with the 2017 presentation. The changes in the reportable segments have no effect on the consolidated balance sheets, statements of income or cash flows for the periods presented. Change in Classification During the fourth quarter ended December 31, 2016, management determined that certain indirect project costs related to field superintendents salaries and benefits, and field expenses, such as field truck, phone and travel expenses, previously classified as salary expense and selling, general and administrative expense should be classified as cost of residential units for periods prior to the fourth quarter ended December 31, 2016, to properly present cost of residential units, salary expense, and selling, general and administrative expense. We determined that the change in classification is not material to any prior period financial statements. Accordingly, we changed the classification of salary expense of $1.3 million and $3.6 million , for the three and nine months ended September 30, 2016 , and selling, general and administrative expense of $0.3 million and $0.7 million for the three and nine months ended September 30, 2016 , respectively, to cost of residential units. There was no impact to net income during the prior period as a result of the change in classification. 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. Subsequent to the issuance of ASU 2014-09, the FASB issued several amendments in 2016 to the original standard including ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) , ASU 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing and ASU 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow Scope Improvements and Practical Expedients . These amendments do not change the core principle of the guidance stated in ASU 2014-09. Rather, they are intended to clarify and improve understanding of certain topics included in ASU 2014-09. The Company is continuing to evaluate ASU 2014-09; however, we do not expect the new standard to affect revenue recognition in our Builder Operations segment, which represents approximately 95% of total revenues. Based on our initial assessment, the impact of the application of ASU 2014-09 is not anticipated to have a material impact on our current revenue recognition policies. We are still evaluating the potential impact the adoption of ASU 2014-09 will have on the timing and recognition of revenue in other aspects of our business, but we expect revenues to remain substantially unchanged as a result of adopting ASU 2014-09, although this could change based on our on-going analysis. The Company is continuing to evaluate the impact of ASU 2014-09 on the Company’s information technology systems, processes and internal controls and the expected method of adoption. ASU 2014-09 and the related amendments are effective for the Company beginning on January 1, 2018 . Early adoption is permitted for reporting periods beginning after December 15, 2016. ASU 2014-09 permits the use of either the full retrospective approach or the modified retrospective approach. The Company expects to adopt the new standard under the modified retrospective approach and complete its assessment process prior to the adoption of the standard on January 1, 2018. In November 2015, FASB issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes , as part of its simplification initiative. The standard amends the existing guidance to require that deferred income tax liabilities and assets be classified as noncurrent in a classified balance sheet, and eliminates the prior guidance which required an entity to separate deferred tax liabilities and assets into a current amount and a noncurrent amount in a classified balance sheet. The standard was effective for the Company beginning on January 1, 2017 . The adoption of this standard did not have a material effect on the Company’s condensed consolidated financial statements and related disclosures. In February 2016, FASB issued ASU No. 2016-02, Leases , which requires an entity that leases assets to classify the leases as either finance or operating leases and to record assets and liabilities for the rights and obligations created by long-term leases, regardless of the lease classification. The lease classification will determine whether the lease expense is recognized based on an effective interest rate method or on a straight line basis over the term of the lease. This standard is effective for the Company beginning on January 1, 2019 and must be adopted using a modified retrospective approach. 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 March 2016, FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting , which simplifies several aspects related to the accounting for share-based payment transactions, including the accounting for income taxes, statutory tax withholding requirements and classification on the statement of cash flows. This standard was effective for the Company beginning on January 1, 2017 . The adoption of this standard did not have a material effect on the Company’s condensed consolidated financial statements and related disclosures. In August 2016, FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments , which reduces the existing diversity in practice in financial reporting across all industries by clarifying certain existing principles in ASC 230, Statement of Cash Flows , including providing additional guidance on how and what an entity should consider in determining the classification of certain cash receipts and cash payments. This standard is effective for the Company beginning on January 1, 2018 . 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 November 2016, FASB issued ASU 2016-18, S tatement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force) , which requires restricted cash to be included with cash and cash equivalents when reconciling the beginning and ending amounts on the statement of cash flows. This standard is effective for the Company beginning January 1, 2018 , and is to be applied using a retrospective transition method. The Company elected to early adopt this standard during January 2017, and the standard was applied retrospectively for all periods presented. As a result of the adoption of this standard, the Company no longer presents the change within restricted cash in the operating activities section of the condensed consolidated statement of cash flows. In January 2017, FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business . The standard provides a more robust framework for determining whether transactions should be accounted for as acquisitions or dispositions of assets or businesses. This standard is effective for the Company beginning on January 1, 2018 . Early adoption is permitted for transactions which occurred before the issuance date or effective date of the standard if the transactions were not reported in financial statements that have been issued or made available for issuance. The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures. Once adopted, the Company will analyze any future acquisitions to determine whether the transaction qualifies as a purchase of a business or an asset. In May 2017, FASB issued ASU 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting , which amends the scope of modification accounting for share-based payment arrangements. The standard provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under ASC 718, Compensation—Stock Compensation . Specifically, an entity would not apply modification accounting if the fair value, vesting conditions, and classification of the awards are the same immediately before and after the modification. This standard is effective for the Company beginning on January 1, 2018 . The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures.

Net Income Attributable to Gree

Net Income Attributable to Green Brick Partners, Inc. Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Net Income Attributable to Green Brick Partners, Inc. Per Share	NET INCOME ATTRIBUTABLE TO GREEN BRICK PARTNERS, INC. PER SHARE The Company's restricted stock awards have the right to receive forfeitable dividends on an equal basis with common stock and therefore are not considered participating securities that must be included in the calculation of net income per share using the two-class method. Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding during each period, adjusted for non-vested shares of restricted stock awards during each period. Diluted earnings per share is calculated using the treasury stock method and includes the effect of all dilutive securities, including stock options and restricted stock awards. The computation of basic and diluted net income attributable to Green Brick Partners, Inc. per share using the treasury stock method is as follows (in thousands, except per share amounts): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Basic net income attributable to Green Brick Partners, Inc. per share Net income attributable to Green Brick Partners, Inc. —basic $ 9,280 $ 6,243 $ 23,165 $ 16,080 Weighted-average number of shares outstanding —basic 49,808 48,899 49,274 48,868 Basic net income attributable to Green Brick Partners, Inc. per share $ 0.19 $ 0.13 $ 0.47 $ 0.33 Diluted net income attributable to Green Brick Partners, Inc. per share Net income attributable to Green Brick Partners, Inc. —diluted $ 9,280 $ 6,243 $ 23,165 $ 16,080 Weighted-average number of shares used to compute basic net income attributable to Green Brick Partners, Inc. 49,808 48,899 49,274 48,868 Dilutive effect of stock options and restricted stock awards 84 8 73 3 Weighted-average number of shares outstanding —diluted 49,892 48,907 49,347 48,871 Diluted net income attributable to Green Brick Partners, Inc. per share $ 0.19 $ 0.13 $ 0.47 $ 0.33 The following securities that could potentially dilute earnings per share in the future are not included in the determination of diluted net income attributable to Green Brick Partners, Inc. per common share (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Antidilutive options to purchase common stock and restricted stock awards — 113 — 186

Investment in Unconsolidated En

Investment in Unconsolidated Entity	9 Months Ended
	Sep. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]
Investment in Unconsolidated Entity	INVESTMENT IN UNCONSOLIDATED ENTITY On August 15, 2017 , the Company, JBGL Ownership LLC, a Delaware limited liability company and a wholly owned subsidiary of the Company (“JBGL”), and GB Challenger, LLC, a newly formed Texas limited liability company (the “Challenger Subsidiary”) entered into a Membership Interest Purchase and Contribution Agreement (the “Agreement”) with The Challenger Group, Inc., a Wyoming corporation (“TCGI”), TCG Holdings, LLC, a Wyoming limited liability company (“TCG”), GTG Holdings, LLC, a Wyoming limited liability company (“GTG” and together with TCGI and TCG, the “Challenger Entities”) and Brian R. Bahr (“Bahr”), resulting in the Company, through its interest in JBGL, and the Challenger Entities owning a 49.9% and 50.1% ownership interest, respectively, in the Challenger Subsidiary, and the Challenger Subsidiary owning all of the membership and ownership interests in the subsidiaries of the Challenger Entities named in the Agreement (“Challenger Homebuilder Subsidiaries”). As consideration for such interests, the Company agreed to issue to the Challenger Entities, or their designees, 1,497,000 shares of its common stock, par value $0.01 per share, in a private placement, with 20,000 shares of its common stock heldback pending satisfactory resolution of indemnification claims (“Holdback Shares”). The Company expects to issue the Holdback Shares during the second or third quarter of 2018 ; therefore, until the shares have been issued, $0.2 million has been recorded in additional paid-in capital on the condensed consolidated balance sheets. The Challenger Entities, at its discretion, may offer to sell and transfer an additional 20.1% or, in certain circumstances, all of the Challenger Entities’ interest in the Challenger Subsidiary (“Additional Membership Interests”) to the Company on or after the third anniversary of the Agreement. The Company is not required to purchase the Membership Interests. The Company incurred $0.2 million in related acquisition costs which are included in the cost basis of investment in unconsolidated entity. The Challenger Entities operate homebuilding operations under the name Challenger Homes. The Company partnered with Challenger Homes in order to expand its business with partners that are complementary to its current builder partner group and to gain a presence in the Colorado Springs market. Challenger Homes constructs townhouses, single family homes and luxury patio homes, and is headquartered in Colorado Springs, Colorado. The Company’s investment in the Challenger Subsidiary at August 15, 2017 of $15.1 million was more than its share of the estimated underlying net assets of the Challenger Subsidiary, resulting in a preliminary difference in basis of approximately $5.1 million , which was attributed to goodwill, which will not be amortized. The goodwill will be reviewed for impairment as part of the investment in unconsolidated entity. The Company’s investment in the Challenger Subsidiary on August 15, 2017 was determined as follows (in thousands, except per share data): Consideration transferred at closing Green Brick common stock issued 1,477 Price per share of Green Brick’s common stock (1) $ 9.90 Fair value of common stock consideration $ 14,622 Acquisition related costs $ 241 Total fair value of consideration transferred at closing $ 14,863 Future consideration Holdback Shares 20 Price per share of Green Brick’s common stock (1) $ 9.90 Total fair value of future consideration $ 198 Total fair value of consideration $ 15,061 (1) Based upon closing price of the Company’s common stock upon the parties’ execution of the Agreement. The Challenger Entities and the Company will direct the operations of the Challenger Homebuilder Subsidiaries through the Challenger Subsidiary, with the Company as the minority stakeholder. The Company holds two of the five board of managers (the “Managers”) seats of the Challenger Subsidiary. The Challenger Subsidiary’s six officers, employees of the Challenger Entities, were designated by the Managers for the purpose of managing the day to day operations. The Company does not have a controlling financial interest in the Challenger Subsidiary, as the Company has less than 50% of the voting interests in the Challenger Subsidiary. The Company’s investment in the Challenger Subsidiary is treated as an unconsolidated investment under the equity method of accounting, carried at cost, and included in investment in unconsolidated entity in the Company’s condensed consolidated balance sheets. The net carrying value of the Company’s investment in the Challenger Subsidiary was $15.8 million as of September 30, 2017 . For the three and nine months ended September 30, 2017 , there were no impairments related to our investment in this unconsolidated entity. The Company recognized $1.0 million in equity in income of unconsolidated entity from the date of the acquisition through September 30, 2017 . A summary of the preliminary unaudited condensed financial information of an unconsolidated entity that is accounted for under the equity method is as follows (in thousands): September 30, 2017 Cash $ 3,269 Accounts receivable 164 Inventory 59,320 Goodwill 4,840 Other assets 5,133 Total assets $ 72,726 Accounts payable $ 2,244 Accrued expenses 2,559 Notes payable 41,662 Equity 26,261 Total liabilities and equity $ 72,726 Two Months Ended September 30, 2017 Revenues $ 21,955 Gross profit $ 5,694 Income before taxes $ 1,940

Inventory

Inventory	9 Months Ended
	Sep. 30, 2017
Inventory Disclosure [Abstract]
Inventory	INVENTORY Inventory consists of land in the process of development, undeveloped land, developed lots, completed homes, raw land scheduled for development and land not owned under option agreements in Texas and Georgia. Inventory is valued at cost unless the carrying value is determined to not be recoverable in which case the affected inventory is written down to fair value. Cost includes any related pre-acquisition costs that are directly identifiable with a specific property so long as those pre-acquisition costs are recoverable at the sale of the property. A summary of inventory is as follows (in thousands): September 30, 2017 December 31, 2016 Completed home inventory and residential lots held for sale $ 96,694 $ 127,679 Work in process 372,916 269,255 Undeveloped land 1,737 4,070 Land not owned under option agreements 7,022 9,293 Total Inventory $ 478,369 $ 410,297 The Company capitalizes interest costs incurred to inventory during active development and other qualifying activities. Interest capitalized as cost of inventory is charged to cost of sales as related homes, land and/or lots are closed. Interest incurred on undeveloped land is directly expensed and included in interest expense in our condensed consolidated statements of income. Interest costs incurred, capitalized and expensed were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Interest capitalized at beginning of period $ 9,425 $ 8,909 $ 9,417 $ 9,085 Interest incurred 1,177 742 2,955 2,267 Interest charged to cost of sales (716 ) (546 ) (2,486 ) (2,247 ) Interest charged to interest expense — — — — Interest capitalized at end of period $ 9,886 $ 9,105 $ 9,886 $ 9,105

Debt

Debt	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Debt	DEBT Lines of Credit Lines of credit outstanding as of September 30, 2017 and December 31, 2016 consist of the following (in thousands): September 30, 2017 December 31, 2016 Promissory note to Inwood National Bank (“Inwood”): Revolving credit facility (1) $ 20,000 $ 15,000 Unsecured revolving credit facility (2) 75,000 60,000 Total lines of credit $ 95,000 $ 75,000 (1) On July 30, 2015 , the Company entered into a revolving credit facility (the “Credit Facility”) with Inwood, which provides for up to $50.0 million . Amounts outstanding under the Credit Facility are secured by mortgages on real property and security interests in certain personal property (to the extent that such personal property is connected with the use and enjoyment of the real property) that is owned by certain of the Company’s subsidiaries. Outstanding borrowings under the Credit Facility bear interest payable monthly at a floating rate per annum equal to the rate announced by Bank of America, N.A., from time to time, as its “Prime Rate” (the “Index”) with such adjustments to the interest rate being made on the effective date of any change in the Index. Notwithstanding the foregoing, the interest may not, at any time, be less than 4% per annum or more than the lesser amount of 18% and the highest maximum rate allowed by applicable law. The entire unpaid principal balance and any accrued but unpaid interest is due and payable on the maturity date. As of September 30, 2017 , the interest rate on outstanding borrowings under the Credit Facility was 4.3% per annum. On May 3, 2016, the Company amended the Credit Facility. The amended Credit Facility is subject to a borrowing base limitation equal to the sum of 50% of the total value of land and 65% of the total value of lots owned by certain of the Company's subsidiaries, each as determined by an independent appraiser, with the value of land being restricted from being more than 65% of the borrowing base. Beginning on August 1, 2017, a non-usage fee equal to 0.25% of the average unfunded amount of the $50.0 million commitment amount over a trailing 12 month period is due on or before August 1st of each year during the term of the amended Credit Facility. The maturity date has been extended to May 1, 2019 . The costs of $0.1 million associated with the amendment were deferred and are included in other assets, net in our condensed consolidated balance sheets. The Company is amortizing these debt issuance costs to interest expense over the term of the Credit Facility using the straight line method. Under the terms of the amended Credit Facility, the Company is required, among other things, to maintain minimum multiples of net worth in excess of the outstanding Credit Facility balance, minimum interest coverage and maximum leverage. The Company was in compliance with these financial covenants under the Credit Facility as of September 30, 2017 . (2) On December 15, 2015, the Company entered into a credit agreement (the “Credit Agreement”) with the lenders named therein, and Citibank, N.A., as administrative agent, providing for a senior, unsecured revolving credit facility with aggregate lending commitments of up to $40.0 million (the “Unsecured Revolving Credit Facility”). Before the First Amendment (as defined and discussed below) increased the maximum amount of the Unsecured Revolving Credit Facility, the Company could, at its option and subject to certain terms and conditions, prior to the termination date, increase the amount of the Unsecured Revolving Credit Facility up to a maximum aggregate amount of $75.0 million . Before the Second Amendment (as defined and discussed below), commitments under the Unsecured Revolving Credit Facility are available until the period ending December 14, 2018. Citibank, N.A. and Credit Suisse AG, Cayman Islands Branch (“Credit Suisse”), initially committed to provide $25.0 million and $15.0 million , respectively. The Unsecured Revolving Credit Facility provides for interest rate options on advances at rates equal to either: (x) in the case of base rate advances, the highest of (i) Citibank’s base rate, (ii) the federal funds rate plus 0.5% , and (iii) the one-month LIBOR plus 1.0% , in each case plus 1.5% ; or (y) in the case of Eurodollar rate advances, the reserve adjusted LIBOR plus 2.5% . Interest on amounts borrowed under the Unsecured Revolving Credit Facility is payable in arrears quarterly on the last day of each March, June, September and December during such periods. As of September 30, 2017 , the interest rate on outstanding borrowings under the Credit Facility was 3.7% per annum. The Company pays the lenders a commitment fee on the amount of the unused commitments on a quarterly basis at a rate per annum equal to 0.45% . Outstanding borrowings under the Unsecured Revolving Credit Facility are subject to, among other things, a borrowing base. The borrowing base limitation is equal to the sum of: 100% of unrestricted cash (in excess of $15.0 million ); 85% of the book value of model homes, construction in progress homes, sold completed homes and speculative homes (subject to certain limitations on the age and number of speculative homes and model homes); 65% of the book value of finished lots and land under development; and 50% of the book value of entitled land (subject to certain limitations on the value of entitled land and land under development as a percentage of the borrowing base). On August 31, 2016, the Company entered into a First Amendment to the Credit Agreement (the “First Amendment”), with Flagstar Bank, FSB (“Flagstar Bank”), the lenders named therein, and Citibank, N.A., as administrative agent, which amended the Credit Agreement. The First Amendment added Flagstar Bank as a lender under the Credit Agreement, with an initial commitment of $20.0 million , which increased the aggregate lending commitments available under the Unsecured Revolving Credit Facility from $40.0 million to $60.0 million . The First Amendment also increased the maximum amount of the Unsecured Revolving Credit Facility to a maximum aggregate amount of $110.0 million . On December 1, 2016, the Company, entered into a Second Amendment to the Credit Agreement (the “Second Amendment”), with the lenders named therein, and Citibank, N.A., as administrative agent, which further amended the Credit Agreement. The Second Amendment, among other things, extended the termination date with respect to commitments under the Unsecured Revolving Credit Facility from December 14, 2018 to December 14, 2019. The Second Amendment became effective upon the payment of an upfront fee of 0.15% of the aggregate amount of any extended commitments on December 15, 2016. Additionally, Citibank, N.A. increased its commitment under the Unsecured Revolving Credit Facility from $25.0 million to $35.0 million , which increased the aggregate lending commitments available under the Unsecured Revolving Credit Facility from $60.0 million to $70.0 million . On March 6, 2017, Flagstar Bank increased its commitment under the Unsecured Revolving Credit Facility from $20.0 million to $35.0 million , which increased the aggregate lending commitments available under the Unsecured Revolving Credit Facility from $70.0 million to $85.0 million . The costs of $0.1 million associated with this increase in commitment were deferred and are included in other assets, net in the consolidated balance sheets. The Company is amortizing these debt issuance costs to interest expense over the term of the Unsecured Revolving Credit Facility using the straight line method. On September 1, 2017, the Company entered into a Third Amendment to the Credit Agreement (the “Third Amendment”), with Flagstar Bank, the lenders named therein, and Citibank, N.A., as administrative agent, which amended the Credit Agreement. Pursuant to the Third Amendment, Flagstar Bank increased its commitment from $35.0 million to $70.0 million and Credit Suisse increased its commitment from $15.0 million to $25.0 million , which increased the aggregate lending commitments available under the Unsecured Revolving Credit Facility from $85.0 million to $130.0 million . The Third Amendment also increased the maximum amount of the Unsecured Revolving Credit Facility from $110.0 million to a maximum aggregate amount of $200.0 million , which further increases are available at the Company’s option, prior to the termination date, subject to certain terms and conditions. In addition, the Third Amendment appoints Flagstar in the roles as the sole lead arranger and administrative agent under the Credit Agreement. The costs of $0.4 million associated with the Third Amendment were deferred and are included in other assets, net in the consolidated balance sheets. The Company is amortizing these debt issuance costs to interest expense over the term of the Unsecured Revolving Credit Facility using the straight line method. Additionally, under the terms of the Unsecured Revolving Credit Facility, the Company is required, among other things, to maintain compliance with various covenants, including financial covenants relating to a maximum Leverage Ratio, a minimum Interest Coverage Ratio, and a minimum Consolidated Tangible Net Worth, each as defined therein. The Company's compliance with these financial covenants is measured by calculations and metrics that are specifically defined or described by the terms of the Unsecured Revolving Credit Facility. The Company was in compliance with these covenants as of September 30, 2017 . Notes Payable Notes payable outstanding as of September 30, 2017 and December 31, 2016 consist of the following (in thousands): September 30, 2017 December 31, 2016 Notes payable to unrelated third parties: Briar Ridge Investments, LTD (1) $ 9,000 $ 9,000 Wretched Land, LP (2) — 713 Graham Mortgage Corporation (3) 1,204 1,235 Total notes payable $ 10,204 $ 10,948 (1) On December 13, 2013, a subsidiary of JBGL signed a promissory note for $9.0 million maturing on December 13, 2017, bearing interest at 6.0% per annum and collateralized by land purchased in Allen, Texas. Accrued interest as of September 30, 2017 was $0 . In December 2016, this note was extended through December 31, 2018. (2) On August 19, 2016, a subsidiary of JBGL signed a promissory note for $1.4 million that was to mature on January 1, 2017, bearing interest at 2.0% per annum and collateralized by land located in Allen, Texas. $0.7 million of this note was repaid during September 2016. In December 2016, this note was extended through March 1, 2017. The note was paid off on March 1, 2017. (3) On November 30, 2016, a subsidiary of JBGL signed a promissory note for $1.2 million maturing on December 1, 2018, bearing interest at 3.0% per annum and collateralized by land located in Sunnyvale, Texas.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2017
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity	STOCKHOLDERS’ EQUITY A summary of changes in stockholders’ equity is presented below (dollars in thousands): Common Stock Additional Paid-in Capital Retained Earnings Total Green Brick Partners, Inc. Stockholders’ Equity Noncontrolling Interests Total Stockholders’ Equity Shares Amount Balance as of December 31, 2016 48,955,909 $ 490 $ 273,149 $ 110,933 $ 384,572 $ 16,913 $ 401,485 Share-based compensation — — 215 — 215 — 215 Issuance of common stock under 2014 Omnibus Equity Incentive Plan 214,649 2 1,767 — 1,769 — 1,769 Amortization of deferred share-based compensation — — 258 — 258 — 258 Withholdings from vesting of restricted stock awards (63,057 ) (1 ) (585 ) — (586 ) — (586 ) Common stock issued in connection with the investment in the Challenger Subsidiary 1,477,000 15 14,608 — 14,623 — 14,623 Common stock issuable in connection with the investment in the Challenger Subsidiary — — 198 — 198 — 198 Contributions — — — — — 438 438 Distributions — — — — — (9,740 ) (9,740 ) Net income — — — 23,165 23,165 6,420 29,585 Balance as of September 30, 2017 50,584,501 $ 506 $ 289,610 $ 134,098 $ 424,214 $ 14,031 $ 438,245 Equity Issuance in Connection with the Acquisition of an Unconsolidated Entity On August 15, 2017 , the Company entered into the Agreement pursuant to which it acquired a 49.9% membership and ownership interest in the Challenger Subsidiary which acquired all of the membership and ownership interests in the Challenger Builder Subsidiaries. As consideration for such interests, the Company agreed to issue 1,477,000 unregistered shares of its common stock, par value $0.01 per share (excluding 20,000 Holdback Shares). The issuance of the common stock by the Company was exempt from registration pursuant to Section 4(a)(2) of the Securities Act of 1933, as amended, and the safe harbor provided by Rule 506 promulgated thereunder. The Company relied, in part, upon representations from each of the individuals that they are “accredited investors” as such term is defined in Rule 501 of Regulation D. See Note 3 for further discussion.

Share Repurchase Program

Share Repurchase Program	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Share Repurchase Program	SHARE REPURCHASE PROGRAM In March 2016, the Company's Board of Directors authorized a share repurchase program of up to 1,000,000 shares of its common stock through 2017 . The timing, volume and nature of share repurchases will be at the discretion of management and dependent on market conditions, corporate and regulatory requirements and other factors, and may be suspended or discontinued at any time. The authorized repurchases will be made from time to time in the open market, through block trades or in privately negotiated transactions. No assurance can be given that any particular amount of common stock will be repurchased. All or part of the repurchases may be implemented under a Rule 10b5-1 trading plan, which would allow repurchases under pre-set terms at times when we might otherwise be prevented from doing so under insider trading laws or because of self-imposed blackout periods. This repurchase program may be modified, extended or terminated at the discretion of our Board of Directors at any time. We intend to finance the repurchases with available cash. No shares were repurchased during the nine months ended September 30, 2017 and September 30, 2016 , respectively.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION We measure and account for share-based awards in accordance with ASC Topic 718, “ Compensation - Stock Compensation ”. Share-based compensation expense associated with stock options with vesting contingent upon the achievement of service conditions is recognized on a straight-line basis, net of estimated forfeitures of unvested stock options, over the requisite service period the awards are expected to vest. We estimate the aggregate intrinsic value of stock options with vesting contingent upon the achievement of service conditions as of the date the award was granted using the Black-Scholes option pricing model. The Black-Scholes option-pricing model requires the use of certain input variables, such as expected volatility, risk-free interest rate and expected award life. Share-Based Award Activity During the nine months ended September 30, 2017 , the Company granted restricted stock awards (“RSAs”) under its 2014 Omnibus Equity Incentive Plan to Named Executive Officers (“NEOs”) and non-employee members of the Board of Directors (“BODs”). The RSAs granted to the NEOs were 100% vested and non-forfeitable on the grant date. The BODs elected to defer up to 100% of their annual retainer fee, chairman fees and meeting fees in the form of common stock. The RSAs granted to the BODs will become fully vested on the earlier of (i) the first anniversary of the date of grant of the shares of restricted common stock or (ii) the date of the Company's 2018 Annual Meeting of Stockholders. The fair value of the RSAs granted to the NEOs and BODs were recorded as share-based compensation expense on the grant date and over the vesting period, respectively. The Company withheld 63,057 shares of common stock, at a total cost of $0.6 million , from NEOs to satisfy statutory minimum tax requirements in respect of the RSAs. A summary of restricted stock awards activity during the nine months ended September 30, 2017 is as follows: Number of Shares (in thousands) Weighted Average Grant Date Fair Value per Share Nonvested, December 31, 2016 38 $ 7.51 Granted 215 $ 10.06 Vested (215 ) $ 9.57 Forfeited — $ — Nonvested, September 30, 2017 38 $ 10.25 A summary of stock option activity during the nine months ended September 30, 2017 is as follows: Number of Shares (in thousands) Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) Options outstanding, December 31, 2016 500 $ 7.49 Granted — — Exercised — — Forfeited — — Options outstanding, September 30, 2017 500 $ 7.49 7.07 $ 1,205 Options exercisable, September 30, 2017 200 $ 7.49 7.07 $ 482 A summary of our unvested stock options during the nine months ended September 30, 2017 is as follows: Number of Shares (in thousands) Weighted Average Per Share Grant Date Fair Value Unvested, December 31, 2016 300 $ 2.88 Granted — $ — Vested — $ — Forfeited — $ — Unvested, September 30, 2017 300 $ 2.88 Valuation of Share-Based Awards We utilize the Black-Scholes option pricing model for estimating the grant date fair value of stock options. There were no stock options issued during the nine months ended September 30, 2017 and September 30, 2016 . Share-Based Compensation Expense Share-based compensation expense was $0.2 million and $2.2 million for the three and nine months ended September 30, 2017 , respectively, and $0.1 million and $1.0 million for the three and nine months ended September 30, 2016 , respectively. As of September 30, 2017 , the estimated total remaining unamortized share-based compensation expense related to unvested restricted stock awards, net of forfeitures, was $0.3 million which is expected to be recognized over a weighted-average period of 0.6 years. As of September 30, 2017 , the estimated total remaining unamortized share-based compensation expense related to stock options, net of forfeitures, was $0.6 million which is expected to be recognized over a weighted-average period of 2.1 years.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES We recorded an income tax provision of $5.4 million and $13.6 million for the three and nine months ended September 30, 2017 , respectively, as compared to $3.7 million and $9.3 million for the three and nine months ended September 30, 2016 , respectively. The effective tax rate for the three and nine months ended September 30, 2017 was 31.0% and 31.5% , respectively, as compared to 30.9% and 29.7% for the three and nine months ended September 30, 2016 , respectively. The increase in the effective tax rate for the three and nine months ended September 30, 2017 is due to discrete tax items and the change in the ratio of non-controlled earnings relative to pre-tax book income. The effective tax rate for the three and nine months ended September 30, 2016 is driven by the statutory tax rate benefit related to non-controlled earnings and state income taxes.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2017
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS During the three and nine months ended September 30, 2017 and 2016 , the Company had related party transactions through the normal course of business. These transactions include the following: In 2012, we formed Centre Living Homes, LLC (“Centre Living”), a builder that focuses on a limited number of homes and luxury townhomes each year in the Dallas, Texas market. Trevor Brickman, the son of Green Brick’s Chief Executive Officer, is the President of Centre Living. Effective as of January 1, 2015, Centre Living’s operating agreement was amended and restated to the same general terms as with our other builders, such that Green Brick's ownership interest in Centre Living is 50% and Trevor Brickman's ownership interest is 50% for future operations beginning January 1, 2015. Subsequent to this amendment, Green Brick has 51% voting control over the operations of Centre Living. As such, 100% of Centre Living’s operations are included within our condensed consolidated financial statements. The noncontrolling interest attributable to Centre Living was $57,535 and $0.3 million as of September 30, 2017 and December 31, 2016 , respectively. In June 2016, the Company sold one developed lot to Trevor Brickman for $0.4 million , of which $0.3 million was included in the cost of land and lots. In September 2016, Trevor Brickman entered into an agreement with Centre Living to construct a home on the developed lot. In accordance with the Company's employee discount policy, the contract price results in a 13% margin. As of September 30, 2017 , the Company has incurred $0.6 million in costs to construct the home. In September 2015, the Company purchased 11 lots from an entity affiliated with the president of The Providence Group of Georgia L.L.C. (“TPG”), one of its controlled builders. The lots are part of a 19 -home community, The Parc at Cogburn in Atlanta. The total paid for the lots in 2015 was $1.8 million . Under the option agreement in place, the Company purchased $0.3 million in lots during 2016, and $1.0 million during the six months ended June 30, 2017, respectively. The Company purchased all 19 lots as of June 30, 2017. In November 2015, the Company purchased 12 lots from an entity affiliated with the president of TPG. The lots are part of a 92 -unit townhome community, Glens at Sugarloaf in Atlanta. No deposits were paid by the Company in contracting for the lots. The total paid for the lots in 2015 was $1.0 million . During March 2016, the Company purchased the remaining 80 townhome lots within the community at a price of $4.8 million from the affiliated entity. During March 2016, the Company purchased undeveloped land for an eventual 83 lot community, Academy Street in Atlanta. Simultaneously, the Company entered into a partnership agreement with an entity affiliated with the president of TPG to develop the community for sale of the lots to TPG under GRBK Academy LLC. Contributions and profits will be 80% for the Company and 20% for the affiliated entity. Total capital contributions are estimated at $11.8 million , of which $9.4 million was contributed by the Company. The total contributions paid in 2016 were $11.2 million , of which $9.0 million was paid by the Company. The total contributions paid during the three and nine months ended September 30, 2017 was $0.0 million and $0.5 million , of which $0.0 million and $ 0.4 million , respectively, was paid by the Company. The Company has 80% ownership in GRBK Academy, LLC and has consolidated the entity’s results of operation and financial condition into its financial statements. During March 2016, the Company purchased undeveloped land for an eventual 73 -unit townhome community, Suwanee Station in Atlanta. Simultaneously, the Company entered into a partnership agreement with an entity affiliated with the president of TPG to develop the community for sale of the lots to TPG under GRBK Suwanee Station LLC. Contributions and profits will be 50% for the Company and 50% for the affiliated entity. Total capital contributions are estimated at $3.4 million , of which $1.7 million will be contributed by the Company. The total contributions paid in 2016 were $1.8 million , of which $0.9 million was paid by the Company. The total contributions paid during the three and nine months ended September 30, 2017 was $0.3 million and $0.7 million , of which $0.2 million and $0.4 million , respectively, was paid by the Company. The Company holds two of the three board seats and is able to exercise control over the operations of GRBK Suwanee Station LLC, and therefore has consolidated the entity’s results of operation and financial condition into its financial statements. In June 2016, the Company purchased 14 lots from an entity affiliated with the president of TPG. The lots are part of a 40 -unit townhome community, Dunwoody Towneship. No deposits were paid by the Company related to these lots. The total paid for the lots during the three and nine months ended September 30, 2017 , and in all of 2016 was $1.0 million and $2.3 million , and $1.8 million , respectively. The total expected to be paid for the remaining lots is $1.2 million during 2017. In February 2017, Richard A. Costello paid a $110,000 deposit to Centre Living Homes, LLC on a townhome he expects to purchase for a value of approximately $525,000 . In accordance with the Company's employee discount policy, the contract price results in a 13% margin. In February 2017, Jed Dolson paid a $110,000 deposit to Centre Living Homes, LLC on a townhome he expects to purchase for a value of approximately $475,000 . In accordance with the Company's employee discount policy, the contract price results in a 13% margin.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS Fair Value of Financial Instruments The Company’s financial instruments, none of which are held for trading purposes, include cash and cash equivalents, restricted cash, accounts receivable, earnest money deposits, other assets, accounts payable, accrued expenses, customer and builder deposits, obligations related to land not owned under option agreements, borrowings on lines of credit, and notes payable. Per the fair value hierarchy, level 1 financial instruments include: cash and cash equivalents, restricted cash, accounts receivable, earnest money deposits, other assets, accounts payable, accrued expenses, and customer and builder deposits due to their short term nature. Level 2 financial instruments include: borrowings on lines of credit and notes payable. All other instruments are deemed to be level 3. Due to the short-term nature, the carrying amounts of notes payable and borrowings on lines of credit approximates fair value. Furthermore, borrowings on lines of credit include floating interest rate terms. The fair value of obligations related to land not owned under option agreements is primarily determined by discounting the estimated future cash flow of each community using various unobservable inputs in our impairment analysis. The Company estimates that, due to their short term nature of the underlying financial instruments or the proximity of the underlying transaction to the applicable reporting date, the fair value of all financial instruments does not differ materially from the aggregate carrying values recorded in the consolidated financial statements as of September 30, 2017 and December 31, 2016 . Fair Value of Nonfinancial Instruments Nonfinancial assets and liabilities include items such as inventory and long lived assets that are measured at cost unless the carrying value is determined to be not recoverable in which case the affected instrument is written down to fair value. The fair value of inventory is primarily determined by discounting the estimated future cash flow of each community using various unobservable inputs in our impairment analysis. Per the fair value hierarchy, inventory and long lived assets are level 3 nonfinancial instruments. During the nine months ended September 30, 2017 and the year ended December 31, 2016 , the Company did not record any fair value adjustments to those nonfinancial assets and liabilities measured at fair value on a nonrecurring basis.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Warranties The Company accrues an estimate of its exposure to warranty claims based on both current and historical home sales data and warranty costs incurred. The Company offers homeowners a comprehensive third party warranty on each home. Homes are generally covered by a ten year warranty for qualified and defined structural defects, one year for defects and products used, and two years for electrical, mechanical and plumbing systems. Warranty accruals are included within accrued expenses in the condensed consolidated balance sheets. Warranty activity, included in accrued expenses in our condensed consolidated balance sheets consists of the following (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Beginning balance $ 1,503 $ 717 $ 1,210 $ 474 Additions 362 341 1,116 859 Charges (324 ) (205 ) (785 ) (480 ) Ending balance $ 1,541 $ 853 $ 1,541 $ 853 Commitments The Company has leases associated with office space in Georgia and Texas which are classified as operating leases. Rent expense under these leases is included in the selling, general and administrative expense in the consolidated statements of income. Legal Matters Lawsuits, claims and proceedings may be instituted or asserted against us in the normal course of business. The Company is also subject to local, state and federal laws and regulations related to land development activities, house construction standards, sales practices, employment practices and environmental protection. As a result, the Company may be subject to periodic examinations or inquiry by agencies administering these laws and regulations. The Company records a reserve for potential legal claims and regulatory matters when they are probable of occurring and a potential loss is reasonably estimable. The Company accrues for these matters based on facts and circumstances specific to each matter and revises these estimates when necessary. In view of the inherent difficulty of predicting outcomes of legal claims and related contingencies, the Company generally cannot predict their ultimate resolution, related timing or eventual loss. If evaluations indicate loss contingencies that could be material are not probable, but are reasonably possible, the Company will disclose their nature with an estimate of the possible range of losses or a statement that such loss is not reasonably estimable. We believe that the disposition of legal claims and related contingencies will not have a material adverse effect on our results of operations and liquidity or on our financial condition.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION Financial information relating to the Company’s reportable segments is as follows. Operational results of each reportable segment are not necessarily indicative of the results that would have been achieved had the reportable segment been an independent, stand-alone entity during the periods presented. Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2017 2016 2017 2016 Revenues: Builder Operations Texas $ 52,597 $ 48,206 $ 149,977 $ 128,892 Georgia 55,840 39,871 152,202 119,545 Corporate and Other — — — — Land Development 5,269 3,593 15,815 12,127 $ 113,706 $ 91,670 $ 317,994 $ 260,564 Gross profit: Builder Operations Texas $ 12,473 $ 11,843 $ 36,846 $ 32,096 Georgia 13,399 9,591 34,521 27,485 Corporate and Other (2,211 ) (2,144 ) (6,609 ) (6,555 ) Land Development 1,749 1,354 4,864 4,148 $ 25,410 $ 20,644 $ 69,622 $ 57,174 Income before taxes: Builder Operations Texas $ 8,171 $ 8,006 $ 24,424 $ 20,856 Georgia 9,861 6,546 24,176 19,012 Corporate and Other (2,255 ) (3,597 ) (9,274 ) (11,839 ) Land Development 1,516 867 3,894 3,384 $ 17,293 $ 11,822 $ 43,220 $ 31,413 September 30, 2017 December 31, 2016 Inventory: Builder Operations Texas $ 107,168 $ 76,878 Georgia 103,901 90,859 Corporate and Other 11,792 9,834 Land Development 255,508 232,726 $ 478,369 $ 410,297

Basis of Presentation and Sig19

Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Principles of Consolidation	Condensed Basis of Presentation and Principles of Consolidation The unaudited condensed 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 condensed consolidated financial statements should be read in conjunction with our audited consolidated financial statements for the year ended December 31, 2016 , included in our Annual Report on Form 10-K filed with the SEC on March 13, 2017 . Our operating results for the three and nine months ended September 30, 2017 are not necessarily indicative of the results that may be expected for any future periods. 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 condensed consolidated financial statements as required under the provisions of ASC 810, Consolidations . The Company uses the equity method of accounting for its investment in an unconsolidated entity over which it exercises significant influence but do not have a controlling interest. Under the equity method, the Company’s share of the unconsolidated entity’s earnings or loss, if any, is included in the condensed consolidated statements of income.
Use of Estimates	Use of Estimates The preparation of the condensed consolidated financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the amounts reported in the condensed 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 condensed 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 controlled builders. The financial statements of these controlled builders are consolidated in our condensed 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 condensed consolidated balance sheets.
Segment Reporting	Segment Information Prior to the fourth quarter of 2016 , the Company’s operations were organized into two reportable segments: builder operations and land development. Builder operations consisted 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, including geography, product types, production processes, average selling prices, gross profits, suppliers, land acquisition results, and underlying demand and supply. In accordance with ASC 280, Segment Reporting , an operating segment is defined as a component of an enterprise for which discrete financial information is available and is reviewed regularly by the Chief Operating Decision Maker (“CODM”), or decision-making group, to evaluate performance and make operating decisions. The Company identified its CODM as three key executives—the Chief Executive Officer, the Chief Financial Officer and the Texas Region President (formerly, the Head of Land Acquisition and Development). In determining the most appropriate reportable segments, the CODM considered similar economic and other characteristics, including geography, class of customers, product types and production processes. During the fourth quarter of 2016 , the Company re-evaluated its reportable segments under ASC 280. As a result of the departure of the Chief Operating Officer in the fourth quarter of 2015, the management structure and CODM changed during 2016. The discrete financial information that is regularly reviewed by the current CODM group is different than in the past. As such, the builder operations reportable segment now consists of three operating segments. For the nine months ended September 30, 2017 , the Company’s operations are organized into two reportable segments: builder operations and land development. Builder operations consist of three operating segments: Texas, Georgia, and corporate and other. The operations of the Company's controlled builders were aggregated into the builder operations reporting segment because they have similar (1) economic characteristics; (2) housing products; (3) class of homebuyer; (4) regulatory environments; and (5) methods used to construct and sell homes. Corporate operations is a non-operating segment that develops and implements strategic initiatives and supports the Company’s builder operations and land development by centralizing certain administrative functions such as finance, treasury, information technology and human resources. The majority of corporate’s personnel and resources are primarily dedicated to activities relating to the builder operations segment. Therefore, any unallocated corporate expenses are included in the builder operations segment, within the “Corporate and other”, which accounts for 95.4% and 95.0% of total revenues for the three and nine months ended September 30, 2017 , respectively, and 96.1% and 95.3% of total revenues for the three and nine months ended September 30, 2016 , respectively. While Green Brick Title, LLC (“Green Brick Title”) operations are not economically similar to either builder operations or land development, it did not meet the quantitative thresholds, as discussed in ASC 280, to be separately reported and disclosed. As such, Green Brick Title’s results are included within the builder operations segment within the “Corporate and other” operating segment. All prior period segment information has been restated to conform with the 2017 presentation. The changes in the reportable segments have no effect on the consolidated balance sheets, statements of income or cash flows for the periods presented.
Change in Classification of Indirect Project Costs, Policy [Policy Text Block]	Change in Classification During the fourth quarter ended December 31, 2016, management determined that certain indirect project costs related to field superintendents salaries and benefits, and field expenses, such as field truck, phone and travel expenses, previously classified as salary expense and selling, general and administrative expense should be classified as cost of residential units for periods prior to the fourth quarter ended December 31, 2016, to properly present cost of residential units, salary expense, and selling, general and administrative expense. We determined that the change in classification is not material to any prior period financial statements. Accordingly, we changed the classification of salary expense of $1.3 million and $3.6 million , for the three and nine months ended September 30, 2016 , and selling, general and administrative expense of $0.3 million and $0.7 million for the three and nine months ended September 30, 2016 , respectively, to cost of residential units. There was no impact to net income during the prior period as a result of the change in classification.
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. Subsequent to the issuance of ASU 2014-09, the FASB issued several amendments in 2016 to the original standard including ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) , ASU 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing and ASU 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow Scope Improvements and Practical Expedients . These amendments do not change the core principle of the guidance stated in ASU 2014-09. Rather, they are intended to clarify and improve understanding of certain topics included in ASU 2014-09. The Company is continuing to evaluate ASU 2014-09; however, we do not expect the new standard to affect revenue recognition in our Builder Operations segment, which represents approximately 95% of total revenues. Based on our initial assessment, the impact of the application of ASU 2014-09 is not anticipated to have a material impact on our current revenue recognition policies. We are still evaluating the potential impact the adoption of ASU 2014-09 will have on the timing and recognition of revenue in other aspects of our business, but we expect revenues to remain substantially unchanged as a result of adopting ASU 2014-09, although this could change based on our on-going analysis. The Company is continuing to evaluate the impact of ASU 2014-09 on the Company’s information technology systems, processes and internal controls and the expected method of adoption. ASU 2014-09 and the related amendments are effective for the Company beginning on January 1, 2018 . Early adoption is permitted for reporting periods beginning after December 15, 2016. ASU 2014-09 permits the use of either the full retrospective approach or the modified retrospective approach. The Company expects to adopt the new standard under the modified retrospective approach and complete its assessment process prior to the adoption of the standard on January 1, 2018. In November 2015, FASB issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes , as part of its simplification initiative. The standard amends the existing guidance to require that deferred income tax liabilities and assets be classified as noncurrent in a classified balance sheet, and eliminates the prior guidance which required an entity to separate deferred tax liabilities and assets into a current amount and a noncurrent amount in a classified balance sheet. The standard was effective for the Company beginning on January 1, 2017 . The adoption of this standard did not have a material effect on the Company’s condensed consolidated financial statements and related disclosures. In February 2016, FASB issued ASU No. 2016-02, Leases , which requires an entity that leases assets to classify the leases as either finance or operating leases and to record assets and liabilities for the rights and obligations created by long-term leases, regardless of the lease classification. The lease classification will determine whether the lease expense is recognized based on an effective interest rate method or on a straight line basis over the term of the lease. This standard is effective for the Company beginning on January 1, 2019 and must be adopted using a modified retrospective approach. 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 March 2016, FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting , which simplifies several aspects related to the accounting for share-based payment transactions, including the accounting for income taxes, statutory tax withholding requirements and classification on the statement of cash flows. This standard was effective for the Company beginning on January 1, 2017 . The adoption of this standard did not have a material effect on the Company’s condensed consolidated financial statements and related disclosures. In August 2016, FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments , which reduces the existing diversity in practice in financial reporting across all industries by clarifying certain existing principles in ASC 230, Statement of Cash Flows , including providing additional guidance on how and what an entity should consider in determining the classification of certain cash receipts and cash payments. This standard is effective for the Company beginning on January 1, 2018 . 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 November 2016, FASB issued ASU 2016-18, S tatement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force) , which requires restricted cash to be included with cash and cash equivalents when reconciling the beginning and ending amounts on the statement of cash flows. This standard is effective for the Company beginning January 1, 2018 , and is to be applied using a retrospective transition method. The Company elected to early adopt this standard during January 2017, and the standard was applied retrospectively for all periods presented. As a result of the adoption of this standard, the Company no longer presents the change within restricted cash in the operating activities section of the condensed consolidated statement of cash flows. In January 2017, FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business . The standard provides a more robust framework for determining whether transactions should be accounted for as acquisitions or dispositions of assets or businesses. This standard is effective for the Company beginning on January 1, 2018 . Early adoption is permitted for transactions which occurred before the issuance date or effective date of the standard if the transactions were not reported in financial statements that have been issued or made available for issuance. The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures. Once adopted, the Company will analyze any future acquisitions to determine whether the transaction qualifies as a purchase of a business or an asset. In May 2017, FASB issued ASU 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting , which amends the scope of modification accounting for share-based payment arrangements. The standard provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under ASC 718, Compensation—Stock Compensation . Specifically, an entity would not apply modification accounting if the fair value, vesting conditions, and classification of the awards are the same immediately before and after the modification. This standard is effective for the Company beginning on January 1, 2018 . The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures.

Net Income Attributable to Gr20

Net Income Attributable to Green Brick Partners, Inc. Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The computation of basic and diluted net income attributable to Green Brick Partners, Inc. per share using the treasury stock method is as follows (in thousands, except per share amounts): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Basic net income attributable to Green Brick Partners, Inc. per share Net income attributable to Green Brick Partners, Inc. —basic $ 9,280 $ 6,243 $ 23,165 $ 16,080 Weighted-average number of shares outstanding —basic 49,808 48,899 49,274 48,868 Basic net income attributable to Green Brick Partners, Inc. per share $ 0.19 $ 0.13 $ 0.47 $ 0.33 Diluted net income attributable to Green Brick Partners, Inc. per share Net income attributable to Green Brick Partners, Inc. —diluted $ 9,280 $ 6,243 $ 23,165 $ 16,080 Weighted-average number of shares used to compute basic net income attributable to Green Brick Partners, Inc. 49,808 48,899 49,274 48,868 Dilutive effect of stock options and restricted stock awards 84 8 73 3 Weighted-average number of shares outstanding —diluted 49,892 48,907 49,347 48,871 Diluted net income attributable to Green Brick Partners, Inc. per share $ 0.19 $ 0.13 $ 0.47 $ 0.33
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The following securities that could potentially dilute earnings per share in the future are not included in the determination of diluted net income attributable to Green Brick Partners, Inc. per common share (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Antidilutive options to purchase common stock and restricted stock awards — 113 — 186

Investment in Unconsolidated 21

Investment in Unconsolidated Entity (Tables)	9 Months Ended
	Sep. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	The Company’s investment in the Challenger Subsidiary on August 15, 2017 was determined as follows (in thousands, except per share data): Consideration transferred at closing Green Brick common stock issued 1,477 Price per share of Green Brick’s common stock (1) $ 9.90 Fair value of common stock consideration $ 14,622 Acquisition related costs $ 241 Total fair value of consideration transferred at closing $ 14,863 Future consideration Holdback Shares 20 Price per share of Green Brick’s common stock (1) $ 9.90 Total fair value of future consideration $ 198 Total fair value of consideration $ 15,061 (1) Based upon closing price of the Company’s common stock upon the parties’ execution of the Agreement. A summary of the preliminary unaudited condensed financial information of an unconsolidated entity that is accounted for under the equity method is as follows (in thousands): September 30, 2017 Cash $ 3,269 Accounts receivable 164 Inventory 59,320 Goodwill 4,840 Other assets 5,133 Total assets $ 72,726 Accounts payable $ 2,244 Accrued expenses 2,559 Notes payable 41,662 Equity 26,261 Total liabilities and equity $ 72,726 Two Months Ended September 30, 2017 Revenues $ 21,955 Gross profit $ 5,694 Income before taxes $ 1,940

Inventory (Tables)

Inventory (Tables)	9 Months Ended
	Sep. 30, 2017
Inventory Disclosure [Abstract]
Schedule of Real Estate Inventory	A summary of inventory is as follows (in thousands): September 30, 2017 December 31, 2016 Completed home inventory and residential lots held for sale $ 96,694 $ 127,679 Work in process 372,916 269,255 Undeveloped land 1,737 4,070 Land not owned under option agreements 7,022 9,293 Total Inventory $ 478,369 $ 410,297
Summary of Real Estate Inventory Capitalized Interest Costs	Interest costs incurred, capitalized and expensed were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Interest capitalized at beginning of period $ 9,425 $ 8,909 $ 9,417 $ 9,085 Interest incurred 1,177 742 2,955 2,267 Interest charged to cost of sales (716 ) (546 ) (2,486 ) (2,247 ) Interest charged to interest expense — — — — Interest capitalized at end of period $ 9,886 $ 9,105 $ 9,886 $ 9,105

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Instrument [Line Items]
Schedule of Lines of Credit Outstanding	Lines of credit outstanding as of September 30, 2017 and December 31, 2016 consist of the following (in thousands): September 30, 2017 December 31, 2016 Promissory note to Inwood National Bank (“Inwood”): Revolving credit facility (1) $ 20,000 $ 15,000 Unsecured revolving credit facility (2) 75,000 60,000 Total lines of credit $ 95,000 $ 75,000 (1) On July 30, 2015 , the Company entered into a revolving credit facility (the “Credit Facility”) with Inwood, which provides for up to $50.0 million . Amounts outstanding under the Credit Facility are secured by mortgages on real property and security interests in certain personal property (to the extent that such personal property is connected with the use and enjoyment of the real property) that is owned by certain of the Company’s subsidiaries. Outstanding borrowings under the Credit Facility bear interest payable monthly at a floating rate per annum equal to the rate announced by Bank of America, N.A., from time to time, as its “Prime Rate” (the “Index”) with such adjustments to the interest rate being made on the effective date of any change in the Index. Notwithstanding the foregoing, the interest may not, at any time, be less than 4% per annum or more than the lesser amount of 18% and the highest maximum rate allowed by applicable law. The entire unpaid principal balance and any accrued but unpaid interest is due and payable on the maturity date. As of September 30, 2017 , the interest rate on outstanding borrowings under the Credit Facility was 4.3% per annum. On May 3, 2016, the Company amended the Credit Facility. The amended Credit Facility is subject to a borrowing base limitation equal to the sum of 50% of the total value of land and 65% of the total value of lots owned by certain of the Company's subsidiaries, each as determined by an independent appraiser, with the value of land being restricted from being more than 65% of the borrowing base. Beginning on August 1, 2017, a non-usage fee equal to 0.25% of the average unfunded amount of the $50.0 million commitment amount over a trailing 12 month period is due on or before August 1st of each year during the term of the amended Credit Facility. The maturity date has been extended to May 1, 2019 . The costs of $0.1 million associated with the amendment were deferred and are included in other assets, net in our condensed consolidated balance sheets. The Company is amortizing these debt issuance costs to interest expense over the term of the Credit Facility using the straight line method. Under the terms of the amended Credit Facility, the Company is required, among other things, to maintain minimum multiples of net worth in excess of the outstanding Credit Facility balance, minimum interest coverage and maximum leverage. The Company was in compliance with these financial covenants under the Credit Facility as of September 30, 2017 . (2) On December 15, 2015, the Company entered into a credit agreement (the “Credit Agreement”) with the lenders named therein, and Citibank, N.A., as administrative agent, providing for a senior, unsecured revolving credit facility with aggregate lending commitments of up to $40.0 million (the “Unsecured Revolving Credit Facility”). Before the First Amendment (as defined and discussed below) increased the maximum amount of the Unsecured Revolving Credit Facility, the Company could, at its option and subject to certain terms and conditions, prior to the termination date, increase the amount of the Unsecured Revolving Credit Facility up to a maximum aggregate amount of $75.0 million . Before the Second Amendment (as defined and discussed below), commitments under the Unsecured Revolving Credit Facility are available until the period ending December 14, 2018. Citibank, N.A. and Credit Suisse AG, Cayman Islands Branch (“Credit Suisse”), initially committed to provide $25.0 million and $15.0 million , respectively. The Unsecured Revolving Credit Facility provides for interest rate options on advances at rates equal to either: (x) in the case of base rate advances, the highest of (i) Citibank’s base rate, (ii) the federal funds rate plus 0.5% , and (iii) the one-month LIBOR plus 1.0% , in each case plus 1.5% ; or (y) in the case of Eurodollar rate advances, the reserve adjusted LIBOR plus 2.5% . Interest on amounts borrowed under the Unsecured Revolving Credit Facility is payable in arrears quarterly on the last day of each March, June, September and December during such periods. As of September 30, 2017 , the interest rate on outstanding borrowings under the Credit Facility was 3.7% per annum. The Company pays the lenders a commitment fee on the amount of the unused commitments on a quarterly basis at a rate per annum equal to 0.45% . Outstanding borrowings under the Unsecured Revolving Credit Facility are subject to, among other things, a borrowing base. The borrowing base limitation is equal to the sum of: 100% of unrestricted cash (in excess of $15.0 million ); 85% of the book value of model homes, construction in progress homes, sold completed homes and speculative homes (subject to certain limitations on the age and number of speculative homes and model homes); 65% of the book value of finished lots and land under development; and 50% of the book value of entitled land (subject to certain limitations on the value of entitled land and land under development as a percentage of the borrowing base). On August 31, 2016, the Company entered into a First Amendment to the Credit Agreement (the “First Amendment”), with Flagstar Bank, FSB (“Flagstar Bank”), the lenders named therein, and Citibank, N.A., as administrative agent, which amended the Credit Agreement. The First Amendment added Flagstar Bank as a lender under the Credit Agreement, with an initial commitment of $20.0 million , which increased the aggregate lending commitments available under the Unsecured Revolving Credit Facility from $40.0 million to $60.0 million . The First Amendment also increased the maximum amount of the Unsecured Revolving Credit Facility to a maximum aggregate amount of $110.0 million . On December 1, 2016, the Company, entered into a Second Amendment to the Credit Agreement (the “Second Amendment”), with the lenders named therein, and Citibank, N.A., as administrative agent, which further amended the Credit Agreement. The Second Amendment, among other things, extended the termination date with respect to commitments under the Unsecured Revolving Credit Facility from December 14, 2018 to December 14, 2019. The Second Amendment became effective upon the payment of an upfront fee of 0.15% of the aggregate amount of any extended commitments on December 15, 2016. Additionally, Citibank, N.A. increased its commitment under the Unsecured Revolving Credit Facility from $25.0 million to $35.0 million , which increased the aggregate lending commitments available under the Unsecured Revolving Credit Facility from $60.0 million to $70.0 million . On March 6, 2017, Flagstar Bank increased its commitment under the Unsecured Revolving Credit Facility from $20.0 million to $35.0 million , which increased the aggregate lending commitments available under the Unsecured Revolving Credit Facility from $70.0 million to $85.0 million . The costs of $0.1 million associated with this increase in commitment were deferred and are included in other assets, net in the consolidated balance sheets. The Company is amortizing these debt issuance costs to interest expense over the term of the Unsecured Revolving Credit Facility using the straight line method. On September 1, 2017, the Company entered into a Third Amendment to the Credit Agreement (the “Third Amendment”), with Flagstar Bank, the lenders named therein, and Citibank, N.A., as administrative agent, which amended the Credit Agreement. Pursuant to the Third Amendment, Flagstar Bank increased its commitment from $35.0 million to $70.0 million and Credit Suisse increased its commitment from $15.0 million to $25.0 million , which increased the aggregate lending commitments available under the Unsecured Revolving Credit Facility from $85.0 million to $130.0 million . The Third Amendment also increased the maximum amount of the Unsecured Revolving Credit Facility from $110.0 million to a maximum aggregate amount of $200.0 million , which further increases are available at the Company’s option, prior to the termination date, subject to certain terms and conditions. In addition, the Third Amendment appoints Flagstar in the roles as the sole lead arranger and administrative agent under the Credit Agreement. The costs of $0.4 million associated with the Third Amendment were deferred and are included in other assets, net in the consolidated balance sheets. The Company is amortizing these debt issuance costs to interest expense over the term of the Unsecured Revolving Credit Facility using the straight line method. Additionally, under the terms of the Unsecured Revolving Credit Facility, the Company is required, among other things, to maintain compliance with various covenants, including financial covenants relating to a maximum Leverage Ratio, a minimum Interest Coverage Ratio, and a minimum Consolidated Tangible Net Worth, each as defined therein. The Company's compliance with these financial covenants is measured by calculations and metrics that are specifically defined or described by the terms of the Unsecured Revolving Credit Facility.
Notes Payable
Debt Instrument [Line Items]
Schedule of Long-term Debt	Notes payable outstanding as of September 30, 2017 and December 31, 2016 consist of the following (in thousands): September 30, 2017 December 31, 2016 Notes payable to unrelated third parties: Briar Ridge Investments, LTD (1) $ 9,000 $ 9,000 Wretched Land, LP (2) — 713 Graham Mortgage Corporation (3) 1,204 1,235 Total notes payable $ 10,204 $ 10,948 (1) On December 13, 2013, a subsidiary of JBGL signed a promissory note for $9.0 million maturing on December 13, 2017, bearing interest at 6.0% per annum and collateralized by land purchased in Allen, Texas. Accrued interest as of September 30, 2017 was $0 . In December 2016, this note was extended through December 31, 2018. (2) On August 19, 2016, a subsidiary of JBGL signed a promissory note for $1.4 million that was to mature on January 1, 2017, bearing interest at 2.0% per annum and collateralized by land located in Allen, Texas. $0.7 million of this note was repaid during September 2016. In December 2016, this note was extended through March 1, 2017. The note was paid off on March 1, 2017. (3) On November 30, 2016, a subsidiary of JBGL signed a promissory note for $1.2 million maturing on December 1, 2018, bearing interest at 3.0% per annum and collateralized by land located in Sunnyvale, Texas.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2017
Stockholders' Equity Attributable to Parent [Abstract]
Schedule of Stockholders Equity	A summary of changes in stockholders’ equity is presented below (dollars in thousands): Common Stock Additional Paid-in Capital Retained Earnings Total Green Brick Partners, Inc. Stockholders’ Equity Noncontrolling Interests Total Stockholders’ Equity Shares Amount Balance as of December 31, 2016 48,955,909 $ 490 $ 273,149 $ 110,933 $ 384,572 $ 16,913 $ 401,485 Share-based compensation — — 215 — 215 — 215 Issuance of common stock under 2014 Omnibus Equity Incentive Plan 214,649 2 1,767 — 1,769 — 1,769 Amortization of deferred share-based compensation — — 258 — 258 — 258 Withholdings from vesting of restricted stock awards (63,057 ) (1 ) (585 ) — (586 ) — (586 ) Common stock issued in connection with the investment in the Challenger Subsidiary 1,477,000 15 14,608 — 14,623 — 14,623 Common stock issuable in connection with the investment in the Challenger Subsidiary — — 198 — 198 — 198 Contributions — — — — — 438 438 Distributions — — — — — (9,740 ) (9,740 ) Net income — — — 23,165 23,165 6,420 29,585 Balance as of September 30, 2017 50,584,501 $ 506 $ 289,610 $ 134,098 $ 424,214 $ 14,031 $ 438,245

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	A summary of restricted stock awards activity during the nine months ended September 30, 2017 is as follows: Number of Shares (in thousands) Weighted Average Grant Date Fair Value per Share Nonvested, December 31, 2016 38 $ 7.51 Granted 215 $ 10.06 Vested (215 ) $ 9.57 Forfeited — $ — Nonvested, September 30, 2017 38 $ 10.25
Summary of Stock Option Activity	A summary of stock option activity during the nine months ended September 30, 2017 is as follows: Number of Shares (in thousands) Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) Options outstanding, December 31, 2016 500 $ 7.49 Granted — — Exercised — — Forfeited — — Options outstanding, September 30, 2017 500 $ 7.49 7.07 $ 1,205 Options exercisable, September 30, 2017 200 $ 7.49 7.07 $ 482
Summary of Unvested Stock Options Activity	A summary of our unvested stock options during the nine months ended September 30, 2017 is as follows: Number of Shares (in thousands) Weighted Average Per Share Grant Date Fair Value Unvested, December 31, 2016 300 $ 2.88 Granted — $ — Vested — $ — Forfeited — $ — Unvested, September 30, 2017 300 $ 2.88

Commitments and Contingencies C

Commitments and Contingencies Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of Product Warranty Liability [Table Text Block]	The Company accrues an estimate of its exposure to warranty claims based on both current and historical home sales data and warranty costs incurred. The Company offers homeowners a comprehensive third party warranty on each home. Homes are generally covered by a ten year warranty for qualified and defined structural defects, one year for defects and products used, and two years for electrical, mechanical and plumbing systems. Warranty accruals are included within accrued expenses in the condensed consolidated balance sheets. Warranty activity, included in accrued expenses in our condensed consolidated balance sheets consists of the following (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Beginning balance $ 1,503 $ 717 $ 1,210 $ 474 Additions 362 341 1,116 859 Charges (324 ) (205 ) (785 ) (480 ) Ending balance $ 1,541 $ 853 $ 1,541 $ 853

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Schedule of Segment Reporting Information	Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2017 2016 2017 2016 Revenues: Builder Operations Texas $ 52,597 $ 48,206 $ 149,977 $ 128,892 Georgia 55,840 39,871 152,202 119,545 Corporate and Other — — — — Land Development 5,269 3,593 15,815 12,127 $ 113,706 $ 91,670 $ 317,994 $ 260,564 Gross profit: Builder Operations Texas $ 12,473 $ 11,843 $ 36,846 $ 32,096 Georgia 13,399 9,591 34,521 27,485 Corporate and Other (2,211 ) (2,144 ) (6,609 ) (6,555 ) Land Development 1,749 1,354 4,864 4,148 $ 25,410 $ 20,644 $ 69,622 $ 57,174 Income before taxes: Builder Operations Texas $ 8,171 $ 8,006 $ 24,424 $ 20,856 Georgia 9,861 6,546 24,176 19,012 Corporate and Other (2,255 ) (3,597 ) (9,274 ) (11,839 ) Land Development 1,516 867 3,894 3,384 $ 17,293 $ 11,822 $ 43,220 $ 31,413 September 30, 2017 December 31, 2016 Inventory: Builder Operations Texas $ 107,168 $ 76,878 Georgia 103,901 90,859 Corporate and Other 11,792 9,834 Land Development 255,508 232,726 $ 478,369 $ 410,297

Basis of Presentation and Sig28

Basis of Presentation and Significant Accounting Policies (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)segment	Sep. 30, 2016USD ($)segment	Mar. 31, 2016	Jan. 01, 2015
Class of Stock [Line Items]
Ownership Percentage by Parent Included in Consolidation			50.00%
Salary expense	$ 5,218	$ 5,256	$ 15,985	$ 15,886
Number of reportable segments | segment			2	2
Number of operating segments | segment			3	2
Ownership percentage by parent	50.00%		50.00%
Ownership percentage by noncontrolling owners	50.00%		50.00%
Selling, general and administrative expense	$ 4,302	$ 4,130	$ 12,747	$ 12,275
Centre Living
Class of Stock [Line Items]
Ownership percentage by parent						50.00%
Ownership percentage by noncontrolling owners						50.00%
Ownership percent						51.00%
Builder Operations
Class of Stock [Line Items]
Percentage of total revenue	95.40%	96.10%		95.30%
Academy Street | Investee
Class of Stock [Line Items]
Ownership percentage by parent					80.00%
Ownership percentage by noncontrolling owners					20.00%
Change in Classification of Indirect Project Costs
Class of Stock [Line Items]
Salary expense		$ (1,300)		$ (3,600)
Selling, general and administrative expense		$ (300)		$ (700)
Accounting Standards Update 2014-09 | Builder Operations
Class of Stock [Line Items]
Percentage of total revenue			95.00%

Net Income Attributable to Gr29

Net Income Attributable to Green Brick Partners, Inc. Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net income attributable to Green Brick Partners, Inc. —basic	$ 9,280	$ 6,243	$ 23,165	$ 16,080
Weighted-average number of shares outstanding —basic (shares)	49,808	48,899	49,274	48,868
Weighted Average Number Diluted Shares Outstanding Adjustment (shares)	84	8	73	3
Basic net income attributable to Green Brick Partners, Inc. per share (usd per share)	$ 0.19	$ 0.13	$ 0.47	$ 0.33
Net income attributable to Green Brick Partners, Inc. —diluted	$ 9,280	$ 6,243	$ 23,165	$ 16,080
Weighted-average number of shares outstanding —diluted (shares)	49,892	48,907	49,347	48,871
Diluted net income attributable to Green Brick Partners, Inc. per share (usd per share)	$ 0.19	$ 0.13	$ 0.47	$ 0.33
Antidilutive options to purchase common stock (shares)	0	113	0	186

Investment in Unconsolidated 30

Investment in Unconsolidated Entity - Narrative (Details)	Aug. 15, 2017USD ($)officerboard_seat$ / sharesshares	Sep. 30, 2017USD ($)$ / shares	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)$ / shares	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)$ / shares
Business Acquisition [Line Items]
Equity Interest Issuable in Acquisition, Value Assigned				$ 198,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01		$ 0.01		$ 0.01
Investment in unconsolidated entity		$ 15,771,000		$ 15,771,000		$ 0
Equity in income of unconsolidated entity		968,000	$ 0	968,000	$ 0
Challenger Subsidiary [Member]
Business Acquisition [Line Items]
Ownership percent	49.90%
Ownership percent, outside party	50.10%
Common stock issued in connection with the investment in the Challenger Subsidiary (shares) | shares	1,497,000
Equity Interest Issuable in Acquisition, Value Assigned	$ 200,000
Optional additional voting interest could be acquired	20.10%
Acquisition related costs	$ 241,000
Goodwill	5,100,000
Investment in unconsolidated entity	$ 15,100,000
Board seats held | board_seat	2
Board seats available | board_seat	5
Number of officers | officer	6
Impairment loss		$ 0		$ 0
Common Stock | Challenger Subsidiary [Member]
Business Acquisition [Line Items]
Common stock issued in connection with the investment in the Challenger Subsidiary (shares) | shares	1,477,000
Holdback Shares | Challenger Subsidiary [Member]
Business Acquisition [Line Items]
Common stock issued in connection with the investment in the Challenger Subsidiary (shares) | shares	20,000

Investment in Unconsolidated 31

Investment in Unconsolidated Entity - Consideration Transferred At Closing (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 15, 2017	Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]
Fair value of common stock consideration and future consideration		$ 14,623
Challenger Subsidiary [Member]
Schedule of Equity Method Investments [Line Items]
Common stock issued in connection with the investment in the Challenger Subsidiary (shares)	1,497,000
Acquisition related costs	$ 241
Total fair value of consideration transferred at closing	$ 15,061
Challenger Subsidiary [Member] | Common Stock
Schedule of Equity Method Investments [Line Items]
Common stock issued in connection with the investment in the Challenger Subsidiary (shares)	1,477,000
Share price (in usd per share)	$ 9.90
Fair value of common stock consideration and future consideration	$ 14,622
Total fair value of consideration transferred at closing	$ 14,863
Challenger Subsidiary [Member] | Holdback Shares
Schedule of Equity Method Investments [Line Items]
Common stock issued in connection with the investment in the Challenger Subsidiary (shares)	20,000
Share price (in usd per share)	$ 9.90
Fair value of common stock consideration and future consideration	$ 198

Investment in Unconsolidated 32

Investment in Unconsolidated Entity - Summary of Financial Information of Investment (Details) - Challenger Subsidiary [Member] $ in Thousands	2 Months Ended
	Sep. 30, 2017USD ($)
Schedule of Equity Method Investments [Line Items]
Cash	$ 3,269
Accounts receivable	164
Inventory	59,320
Goodwill	4,840
Other assets	5,133
Total assets	72,726
Accounts payable	2,244
Accrued expenses	2,559
Notes payable	41,662
Equity	26,261
Total liabilities and equity	72,726
Revenues	21,955
Gross profit	5,694
Income before taxes	$ 1,940

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Completed home inventory and residential lots held for sale	$ 96,694	$ 127,679
Work in process	372,916	269,255
Undeveloped land	1,737	4,070
Land not owned under option agreements	7,022	9,293
Inventory	$ 478,369	$ 410,297

Inventory (Capitalization of In

Inventory (Capitalization of Interest) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Interest capitalized at beginning of period	$ 9,425	$ 8,909	$ 9,417	$ 9,085
Interest incurred	1,177	742	2,955	2,267
Interest charged to cost of sales	(716)	(546)	(2,486)	(2,247)
Interest charged to interest expense	0	0	0	0
Interest capitalized at end of period	$ 9,886	$ 9,105	$ 9,886	$ 9,105

Debt (Schedule of Lines of Cred

Debt (Schedule of Lines of Credit Outstanding) (Details) - USD ($) $ in Thousands	Sep. 01, 2017	Mar. 06, 2017	May 03, 2016	Dec. 15, 2015	Sep. 30, 2017	Dec. 31, 2016	Dec. 15, 2016	Aug. 31, 2016	Jul. 30, 2015
Line of Credit Facility [Line Items]
Long-term Line of Credit					$ 95,000	$ 75,000
JohnsCreekCarrolltonAllen [Member] | Inwood National Bank [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 50,000						$ 50,000
Long-term Line of Credit					$ 20,000	15,000
BorrowingBaseLimitationTotalValueOfland			50.00%
BorrowingBaseLimitationTotalValueOfLotsOwned			65.00%
MaximumValueOfLandUsedWhenCalculatingBorrowingBase			65.00%
Line of Credit Facility, Interest Rate at Period End					4.30%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.25%
Other Assets [Member] | JohnsCreekCarrolltonAllen [Member] | Inwood National Bank [Member]
Line of Credit Facility [Line Items]
Payments of Debt Issuance Costs			$ 100
Minimum [Member] | JohnsCreekCarrolltonAllen [Member] | Inwood National Bank [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage									4.00%
Maximum [Member] | JohnsCreekCarrolltonAllen [Member] | Inwood National Bank [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage									18.00%
Unsecured Debt [Member] | Unsecured Revolving Credit Facility [Member] | Citibank, N.A. and Credit Suisse AG, CAyman Islands Branch [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 75,000
Long-term Line of Credit				$ 40,000	$ 75,000	$ 60,000
Line of Credit Facility, Interest Rate at Period End					3.70%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.45%
Unrestricted Cash Borrowing Base Limitation				100.00%
Borrowing Base Limitation for Unrestricted Cash				$ 15,000
Book Value of Model Homes Borrowing Base				85.00%
Book Value of Finished Lots and Land Under Development				65.00%
Book Value of Entitled Land				50.00%
Unsecured Debt [Member] | Unsecured Revolving Credit Facility [Member] | Flagstar Bank [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit	$ 70,000	$ 35,000						$ 20,000
Unsecured Debt [Member] | Unsecured Revolving Credit Facility [Member] | Citibank, N.A. [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit				$ 25,000			$ 35,000
Unsecured Debt [Member] | Unsecured Revolving Credit Facility [Member] | Credit Suisse AG, Cayman Islands Branch [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit	25,000			$ 15,000
Unsecured Debt [Member] | Unsecured Revolving Credit Facility [Member] | Citibank, N.A., Credit Suisse AG, Cayman Islands Branch,an d Flagstar Bank [Member] [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	200,000							110,000
Long-term Line of Credit	130,000	85,000					$ 70,000	$ 60,000
Line of Credit Facility, Upfront Fee on Extended Commitments							0.15%
Unsecured Debt [Member] | Other Assets [Member] | Unsecured Revolving Credit Facility [Member] | Flagstar Bank [Member]
Line of Credit Facility [Line Items]
Payments of Debt Issuance Costs		$ 100
Unsecured Debt [Member] | Other Assets [Member] | Unsecured Revolving Credit Facility [Member] | Citibank, N.A., Credit Suisse AG, Cayman Islands Branch,an d Flagstar Bank [Member] [Member]
Line of Credit Facility [Line Items]
Payments of Debt Issuance Costs	$ 400
Unsecured Debt [Member] | Base Rate [Member] | Unsecured Revolving Credit Facility, Base Rate Advances [Member] | Citibank, N.A. and Credit Suisse AG, CAyman Islands Branch [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.50%
Unsecured Debt [Member] | Federal Funds Effective Swap Rate [Member] | Unsecured Revolving Credit Facility, Base Rate Advances [Member] | Citibank, N.A. and Credit Suisse AG, CAyman Islands Branch [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.50%
Unsecured Debt [Member] | London Interbank Offered Rate (LIBOR) [Member] | Unsecured Revolving Credit Facility, Base Rate Advances [Member] | Citibank, N.A. and Credit Suisse AG, CAyman Islands Branch [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.00%
Unsecured Debt [Member] | London Interbank Offered Rate (LIBOR) [Member] | Unsecured Revolving Credit Facility, Eurodollar Rate Advances [Member] | Citibank, N.A. and Credit Suisse AG, CAyman Islands Branch [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				2.50%

Debt (Schedule of Long-term Deb

Debt (Schedule of Long-term Debt - Notes Payable) (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Nov. 30, 2016	Aug. 19, 2016	Dec. 13, 2013
Debt Instrument [Line Items]
Notes payable		$ 10,204		$ 10,948
Debt Instrument, Annual Principal Payment		744	$ 1,870
Notes Payable | Briar Ridge Investments, LTD
Debt Instrument [Line Items]
Notes payable		9,000		9,000
Notes Payable | Wretched Land, LP [Member]
Debt Instrument [Line Items]
Notes payable		0		713
Notes Payable | Graham Mortgage Corporation [Member]
Debt Instrument [Line Items]
Notes payable		1,204		$ 1,235
Subsidiary of JBGL | Notes Payable | Briar Ridge Investments, LTD
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							6.00%
Interest Payable		$ 0
Debt instrument, face amount							$ 9,000
Subsidiary of JBGL | Notes Payable | Wretched Land, LP [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						2.00%
Debt Instrument, Annual Principal Payment	$ 700
Debt instrument, face amount						$ 1,400
Subsidiary of JBGL | Notes Payable | Graham Mortgage Corporation [Member]
Debt Instrument [Line Items]
Notes payable					$ 1,200
Debt Instrument, Interest Rate, Stated Percentage					3.00%

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Class of Stock [Line Items]
Equity Interest Issuable in Acquisition, Value Assigned			$ 198
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (shares)			48,955,909
Beginning balance			$ 401,485
Share-based compensation			215
Issuance of common stock under 2014 Omnibus Equity Incentive Plan			1,769
Common stock issued in connection with the investment in the Challenger Subsidiary			14,623
Amortization of deferred share-based compensation			258
Withholdings from vesting of restricted stock awards			(586)
Contributions			438
Distributions			(9,740)
Net income	$ 11,929	$ 8,165	$ 29,585	$ 22,073
Ending balance (shares)	50,584,501		50,584,501
Ending balance	$ 438,245		$ 438,245
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			16,913
Common stock issued in connection with the investment in the Challenger Subsidiary			0
Withholdings from vesting of restricted stock awards			0
Contributions			438
Distributions			(9,740)
Net income			6,420
Ending balance	14,031		14,031
Total Green Brick Partners, Inc. Stockholders’ Equity
Class of Stock [Line Items]
Equity Interest Issuable in Acquisition, Value Assigned			198
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			384,572
Share-based compensation			215
Issuance of common stock under 2014 Omnibus Equity Incentive Plan			1,769
Common stock issued in connection with the investment in the Challenger Subsidiary			14,623
Amortization of deferred share-based compensation			258
Withholdings from vesting of restricted stock awards			(586)
Distributions			0
Net income			23,165
Ending balance	$ 424,214		$ 424,214
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (shares)			48,955,909
Beginning balance			$ 490
Issuance of common stock under 2014 Omnibus Equity Incentive Plan (shares)			214,649
Issuance of common stock under 2014 Omnibus Equity Incentive Plan			$ 2
Common stock issued in connection with the investment in the Challenger Subsidiary (shares)			1,477,000
Common stock issued in connection with the investment in the Challenger Subsidiary			$ 15
Withholdings from vesting of restricted stock awards (shares)			(63,057)
Withholdings from vesting of restricted stock awards			$ (1)
Ending balance (shares)	50,584,501		50,584,501
Ending balance	$ 506		$ 506
Additional Paid-in Capital
Class of Stock [Line Items]
Equity Interest Issuable in Acquisition, Value Assigned			198
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			273,149
Share-based compensation			215
Issuance of common stock under 2014 Omnibus Equity Incentive Plan			1,767
Common stock issued in connection with the investment in the Challenger Subsidiary			14,608
Amortization of deferred share-based compensation			258
Withholdings from vesting of restricted stock awards			(585)
Ending balance	289,610		289,610
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			110,933
Common stock issued in connection with the investment in the Challenger Subsidiary			0
Withholdings from vesting of restricted stock awards			0
Distributions			0
Net income			23,165
Ending balance	$ 134,098		$ 134,098

Stockholders' Equity (Equity Of

Stockholders' Equity (Equity Offering) (Details) - Challenger Subsidiary [Member]	Aug. 15, 2017shares
Class of Stock [Line Items]
Ownership percent	49.90%
Common stock issued in connection with the investment in the Challenger Subsidiary (shares)	1,497,000
Common Stock
Class of Stock [Line Items]
Common stock issued in connection with the investment in the Challenger Subsidiary (shares)	1,477,000
Holdback Shares
Class of Stock [Line Items]
Common stock issued in connection with the investment in the Challenger Subsidiary (shares)	20,000

Share Repurchase Program (Detai

Share Repurchase Program (Details) - shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2016
Equity [Abstract]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			1,000,000
Stock Repurchased During Period, Shares	0	0

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares granted			0	0
Share-based compensation	$ 200	$ 100	$ 2,242	$ 980
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Withholdings from vesting of restricted stock awards			(586)
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	300		$ 300
Period for recognition			7 months 22 days
Equity Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 600		$ 600
Period for recognition			2 years 26 days
Officer [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Withholdings from vesting of restricted stock awards (shares)			(63,057)
Withholdings from vesting of restricted stock awards			$ (600)

Share-Based Compensation (Summa

Share-Based Compensation (Summary of Restricted Stock Awards) (Details)	9 Months Ended
	Sep. 30, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in period (shares) | shares	214,649
Granted in period (usd per share) | $ / shares	$ 10.06
Number of Shares (in thousands)
Nonvested, December 31, 2014 (shares) | shares	38,000
Granted (shares) | shares	214,649
Vested (shares) | shares	(215,000)
Forfeited (shares) | shares	0
Nonvested, June 30, 2015 (shares) | shares	38,000
Weighted Average Grant Date Fair Value per Share
Nonvested, December 31, 2014 (usd per share) | $ / shares	$ 7.51
Granted (usd per share) | $ / shares	10.06
Vested (usd per share) | $ / shares	9.57
Forfeited (usd per share) | $ / shares	0
Nonvested, June 30, 2015 (usd per share) | $ / shares	$ 10.25
Director [Member]
Weighted Average Grant Date Fair Value per Share
SharebasedCompensationArrangementbySharebasedPaymentAwardElectedAmountofRetainerFeeDeferred	100.00%
Restricted Stock [Member] | Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of awards vested at time of grant	100.00%

Share-Based Compensation (Sum42

Share-Based Compensation (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, beginning balance (in shares)	500,000
Granted (in shares)	0	0
Exercised (in shares)	0
Forfeited (in shares)	0
Options outstanding, ending balance (in shares)	500,000
Options exercisable (in shares)	200,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options outstanding, beginning balance (in dollars per share)	$ 7.49
Granted (in dollars per share)	0
Exercised (in dollars per share)	0
Forfeited (in dollars per share)	0
Options outstanding, ending balance (in dollars per share)	7.49
Options exercisable (in dollars per share)	$ 7.49
Options outstanding, weighted average remaining life (in years)	7 years 26 days
Options exercisable, weighted average remaining life (in years)	7 years 26 days
Options outstanding, aggregate intrinsic value	$ 1,205
Options exercisable, aggregate intrinsic value	$ 482

Share-Based Compensation (Sum43

Share-Based Compensation (Summary of Unvested Stock Options Activity) (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Unvested, beginning balance (in shares) | shares	300
Granted (in shares) | shares	0
Vested (in shares) | shares	0
Forfeited (in shares) | shares	0
Unvested, ending balance (in shares) | shares	300
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested, beginning balance (in dollars per share) | $ / shares	$ 2.88
Granted (in dollars per share) | $ / shares	0
Vested (in dollars per share) | $ / shares	0
Forfeited (in dollars per share) | $ / shares	0
Unvested, ending balance (in dollars per share) | $ / shares	$ 2.88

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating Loss Carryforwards [Line Items]
Income tax provision	$ 5,364	$ 3,657	$ 13,635	$ 9,340
Effective Income Tax Rate Reconciliation, Percent	31.00%	30.90%	31.50%	29.70%

Related Party Transactions (Det

Related Party Transactions (Details)	Jan. 01, 2015	Feb. 28, 2017USD ($)	Sep. 30, 2016	Jun. 30, 2016USD ($)lotLotstownhome	Mar. 31, 2016USD ($)Lotstownhome	Nov. 30, 2015USD ($)Lotstownhome	Sep. 30, 2017USD ($)board_seat	Jun. 30, 2017USD ($)Lots	Sep. 30, 2017USD ($)board_seat	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 30, 2015Lotstownhome
Related Party Transaction [Line Items]
Ownership percentage by parent							50.00%		50.00%
Ownership percentage by noncontrolling owners							50.00%		50.00%
Net income							$ 14,031,000		$ 14,031,000	$ 16,913,000
Centre Living
Related Party Transaction [Line Items]
Percentage of voting interest	51.00%
Ownership percentage by parent	50.00%
Ownership percentage by noncontrolling owners	50.00%
Percent of centre living operations consolidated	100.00%
Net income							57,535		57,535	300,000
The Parc at Cogburn [Member] | Investee
Related Party Transaction [Line Items]
Number of real estate properties | Lots								19				11
Number of units in real estate property | townhome												19
Payments to acquire real estate								$ 1,000,000		300,000	$ 1,800,000
Glens at Sugarloaf [Member] | Investee
Related Party Transaction [Line Items]
Number of real estate properties | Lots						12
Number of units in real estate property | townhome					80	92
Deposit paid for purchase of real estate						$ 0
Payments to acquire real estate					$ 4,800,000						$ 1,000,000
Academy Street
Related Party Transaction [Line Items]
Company capital contributions							9,400,000		9,400,000
Capital contributions made							0		500,000	11,200,000
Payment for capital contributions							0		400,000	9,000,000
Academy Street | Investee
Related Party Transaction [Line Items]
Ownership percentage by parent					80.00%
Ownership percentage by noncontrolling owners					20.00%
Total estimated Capital Contributions							11,800,000		11,800,000
Number of real estate properties | Lots					83
Suwanee Station
Related Party Transaction [Line Items]
Company capital contributions							1,700,000		1,700,000
Capital contributions made							300,000		700,000	1,800,000
Payment for capital contributions							$ 200,000		$ 400,000	900,000
Member ownership interest									80.00%
Board seats held | board_seat							2		2
Board seats available | board_seat							3		3
Suwanee Station | Investee
Related Party Transaction [Line Items]
Total estimated Capital Contributions							$ 3,400,000		$ 3,400,000
Number of real estate properties | townhome					73
Dunwoody Towneship [Member] | Investee
Related Party Transaction [Line Items]
Number of real estate properties | Lots				14
Number of units in real estate property | townhome				40
Deposit paid for purchase of real estate				$ 0
Payments to acquire real estate							1,000,000		2,300,000	$ 1,800,000
Expected purchase payments in 2017							1,200,000		1,200,000
Developed Lots | Centre Living
Related Party Transaction [Line Items]
Number of real estate properties | lot				1
Proceeds from sale of developed lot				$ 400,000
Cost of developed lot sold				$ 300,000
Contract price employee discount premium			13.00%
Development in Process							$ 600,000		$ 600,000
townhome [Domain] | Chief Financial Officer [Member]
Related Party Transaction [Line Items]
Contract price employee discount premium		13.00%
townhome [Domain] | Officer [Member]
Related Party Transaction [Line Items]
Contract price employee discount premium		13.00%
Parent Company [Member] | Suwanee Station | Investee
Related Party Transaction [Line Items]
Ownership percent					50.00%
Affiliated Entity [Member] | Suwanee Station | Investee
Related Party Transaction [Line Items]
Ownership percent					50.00%
Richard A. Costello [Member] | Centre Living
Related Party Transaction [Line Items]
Related party deposit liabilities		$ 110,000
Estimated purchase price to acquire residential real estate		525,000
Jed Dolson [Member] | Centre Living
Related Party Transaction [Line Items]
Related party deposit liabilities		110,000
Estimated purchase price to acquire residential real estate		$ 475,000

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair value adjustment to assets	$ 0	$ 0
Fair value adjustment to liabilities	$ 0	$ 0

Commitments and Contingencies W

Commitments and Contingencies Warranty activity (Details) - Accrued Liabilities [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Product Warranty Liability [Line Items]
Standard Product Warranty Accrual	$ 1,541	$ 853	$ 1,541	$ 853	$ 1,503	$ 1,210	$ 717	$ 474
Standard Product Warranty Accrual, Warranties Issued	362	341	1,116	859
Standard Product Warranty Accrual, Payments	$ (324)	$ (205)	$ (785)	$ (480)

Segment Information (Details)

Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)segment	Sep. 30, 2016USD ($)segment	Dec. 31, 2016USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2	2
Number of operating segments | segment			3	2
Sale of residential units	$ 108,437	$ 87,827	$ 302,179	$ 248,187
Sale of land and lots	5,269	3,843	15,815	12,377
Gross profit	25,410	20,644	69,622	57,174
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	17,293	11,822	43,220	31,413
Operating Segments
Segment Reporting Information [Line Items]
Revenues	113,706	91,670	317,994	260,564
Gross profit	25,410	20,644	69,622	57,174
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	17,293	11,822	43,220	31,413
Assets	478,369		478,369		$ 410,297
Operating Segments | Land Development
Segment Reporting Information [Line Items]
Sale of land and lots	5,269	3,593
Gross Profit on Land and Lots	1,749	1,354	4,864	4,148
Income before taxes on land and lots	1,516	867	3,894	3,384
Assets	255,508		255,508		232,726
Texas | Operating Segments
Segment Reporting Information [Line Items]
Sale of residential units	52,597	48,206	149,977	128,892
Gross Profit, Home Building	12,473	11,843	36,846	32,096
Income before taxes homebuillding	8,171	8,006	24,424	20,856
Assets	107,168		107,168		76,878
Georgia | Operating Segments
Segment Reporting Information [Line Items]
Sale of residential units	55,840	39,871	152,202	119,545
Gross Profit, Home Building	13,399	9,591	34,521	27,485
Income before taxes homebuillding	9,861	6,546	24,176	19,012
Assets	103,901		103,901		90,859
Corporate and Other [Member] | Operating Segments
Segment Reporting Information [Line Items]
Sale of residential units	0	0	0	0
Gross Profit, Home Building	(2,211)	(2,144)	(6,609)	(6,555)
Income before taxes homebuillding	(2,255)	$ (3,597)	(9,274)	$ (11,839)
Assets	$ 11,792		$ 11,792		$ 9,834