Green Brick Partners (GRBK) 10-Q 7 May 18 2018 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 02, 2018
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	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		50,685,699

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	[1]
ASSETS
Cash	$ 34,445	$ 36,684
Restricted cash	4,403	3,605
Accounts receivable	1,548	1,605
Inventory	528,499	495,655
Investment in unconsolidated entity	17,653	16,878
Property and equipment, net	2,108	804
Earnest money deposits	23,374	22,038
Deferred income tax assets, net	27,780	31,211
Other assets, net	3,382	3,750
Total assets	643,192	612,230
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	20,226	22,354
Accrued expenses	16,286	18,465
Customer and builder deposits	22,698	21,447
Borrowings on lines of credit	135,000	107,000
Notes payable	9,914	9,926
Total liabilities	204,124	179,192
Commitments and contingencies	0	0
Green Brick Partners, Inc. stockholders’ equity
Preferred stock, $0.01 par value: 5,000,000 shares authorized; none issued and outstanding	0	0
Common shares, $0.01 par value: 100,000,000 shares authorized; 50,685,699 and 50,598,901 issued and outstanding as of March 31, 2018 and December 31, 2017, respectively	507	506
Additional paid-in capital	290,773	289,938
Retained earnings	137,106	125,903
Total Green Brick Partners, Inc. stockholders’ equity	428,386	416,347
Noncontrolling interests	10,682	16,691
Total stockholders’ equity	439,068	433,038
Total liabilities and stockholders’ equity	$ 643,192	$ 612,230
[1]	The Condensed Consolidated Balance Sheet at December 31, 2017 has been derived from the audited financial statements at that date, but does not include all of the footnotes required by U.S. generally accepted accounting principles for complete financial statements.

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
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 issued (in shares)	50,685,699	50,598,901
Common stock, shares outstanding (in shares)	50,685,699	50,598,901

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Sale of residential units	$ 120,366	$ 93,397
Sale of land and lots	7,899	5,940
Total revenues	128,265	99,337
Cost of residential units	94,509	73,761
Cost of land and lots	6,626	4,290
Total cost of sales	101,135	78,051
Total gross profit	27,130	21,286
Salary expense	6,938	5,435
Selling, general and administrative expense	5,825	4,278
Operating profit	14,367	11,573
Equity in income of unconsolidated entity	1,536	0
Other income, net	708	542
Income before taxes	16,611	12,115
Income tax provision	3,372	3,889
Net income	13,239	8,226
Less: Net income attributable to noncontrolling interests	2,036	2,029
Net income attributable to Green Brick Partners, Inc.	$ 11,203	$ 6,197
Net income attributable to Green Brick Partners, Inc. per common share:
Basic (in dollars per share)	$ 0.22	$ 0.13
Diluted (in dollars per share)	$ 0.22	$ 0.13
Weighted average common shares used in the calculation of net income attributable to Green Brick Partners, Inc. per common share:
Basic (in shares)	50,577	48,958
Diluted (shares)	50,718	49,017

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 13,239	$ 8,226
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation expense	402	88
Share-based compensation expense	1,248	1,912
Deferred income taxes	3,431	3,347
Equity in income of unconsolidated entity	(1,536)	0
Distributions of income from unconsolidated entity	761	0
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable	57	(420)
(Increase) decrease in inventory	(33,948)	3,152
Increase in earnest money deposits	(1,336)	(624)
Decrease (increase) in other assets	367	(739)
Decrease in accounts payable	(2,128)	(2,004)
(Decrease) increase in accrued expenses	(2,179)	633
Increase in customer and builder deposits	1,251	2,979
Net cash (used in) provided by operating activities	(20,371)	16,550
Cash flows from investing activities:
Purchase of property and equipment	(601)	0
Net cash used in investing activities	(601)	0
Cash flows from financing activities:
Borrowings from lines of credit	38,000	5,000
Repayments of lines of credit	(10,000)	(17,500)
Repayments of notes payable	(12)	(725)
Withholdings of taxes from vesting of restricted stock awards	(412)	(586)
Contributions from noncontrolling interests	0	88
Distributions to noncontrolling interests	(8,045)	(4,597)
Net cash provided by (used in) financing activities	19,531	(18,320)
Net decrease in cash and restricted cash	(1,441)	(1,770)
Cash and restricted cash at beginning of period	40,289	39,602
Cash and restricted cash at end of period	38,848	37,832
Supplemental disclosure of cash flow information:
Cash paid for interest, net of capitalized interest	0	0
Cash paid (received) for taxes, net of refunds	(46)	36
Supplemental disclosure of noncash investing activities:
Increase in land not owned under option contracts	$ 0	$ 857

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2018
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, Green Brick Partners, Inc. and its subsidiaries. We are a diversified homebuilding and land development 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. 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. Basis of Presentation The accompanying 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 the consolidated financial statements and accompanying notes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017 . Our operating results for the three months ended March 31, 2018 are not necessarily indicative of the results that may be expected for any future periods. Principles of Consolidation The Company evaluated its wholly-owned subsidiaries and controlled builders under ASC 810, Consolidation (“ASC 810”) and concluded that each controlled builder is a variable interest entity (“VIE”). The Company owns a 50% equity interest and has 51% of the voting interest in each controlled builder. In addition, the Company holds two of the three board seats for each controlled builder and is able to exercise control over the operations of each controlled builder. The Company accounts for its controlled builders under the variable interest model and is the primary beneficiary of each controlled builder in accordance with ASC 810. Therefore, the financial statements of the controlled builders are consolidated in the condensed consolidated financial statements following the variable interest model. All intercompany balances and transactions have been eliminated in consolidation. The Company uses the equity method of accounting for its investment in an unconsolidated entity over which it exercises significant influence but does not have a controlling interest. Under the equity method, the Company’s share of the unconsolidated entity’s earnings or losses, if any, is included in the condensed consolidated statements of income. Seasonality Historically, the homebuilding industry has experienced seasonal fluctuations; therefore, the operating results for the three months ended March 31, 2018 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2018 or subsequent periods. 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. Variable Interest Entities and Noncontrolling Interests The Company accounts for VIEs in accordance with ASC 810. In accordance with ASC 810, an entity is a VIE when: (a) the equity investment at risk in the entity is not sufficient to permit the entity to finance its activities without additional subordinated financial support provided by other parties, including the equity holders; (b) the entity’s equity holders as a group either (i) lack the direct or indirect ability to make decisions about the entity, (ii) are not obligated to absorb expected losses of the entity, or (iii) do not have the right to receive expected residual returns of the entity; or (c) the entity’s equity holders have voting rights that are not proportionate to their economic interests, and the activities of the entity involve or are conducted on behalf of the equity holder with disproportionately few voting rights. If an entity is deemed to be a VIE pursuant to ASC 810, the enterprise that has both (i) the power to direct the activities of the VIE that most significantly impacts the entity’s economic performance and (ii) the obligation to absorb the expected losses of the entity or right to receive benefits from the entity that could be potentially significant to the VIE is considered the primary beneficiary and must consolidate the VIE. In accordance with ASC 810, the Company performs ongoing reassessments of whether it is the primary beneficiary of a VIE. The Company owns 50% equity interests in several controlled builders deemed to be VIEs under ASC 810 for which the Company is considered the primary beneficiary. Our controlled builders are engaged in all aspects of the homebuilding process in residential neighborhoods and master planned communities in premium locations in the Dallas and Atlanta markets. We sell finished lots or option lots from third-party developers to our controlled builders for their homebuilding operations and provide them with construction financing and strategic planning. The board of managers of each of the controlled builders has the power to direct the activities that significantly impact the controlled builder’s economic performance. Pursuant to the Company’s agreements with each controlled builder, it has the ability to appoint two of the three members of the board of managers of each controlled builder’s board of managers. A majority of the board of managers constitutes a quorum to transact business. No action can be approved by the board of managers without the approval from at least one individual whom the Company has appointed at each controlled builder. The Company has the ability to control the activities of each controlled builder that most significantly impact the controlled builder’s economic performance. Such activities include, but are not limited to, involvement in the day to day capital and operating decisions, the ability to determine the budget and plan, the ability to control financing decisions, and the ability to acquire additional land or dispose of land. In addition, the Company has the right to receive the expected residual returns and obligation to absorb the expected losses of each controlled builder through the pro rata profits and losses we are allocated based on our ownership interest. Therefore, the financial statements of the controlled builders are consolidated in the Company’s condensed consolidated financial statements following the variable interest model. The noncontrolling interests attributable to the 50% minority interests owned by our controlled builders are included as noncontrolling interests in the Company’s condensed consolidated financial statements. Our controlled builders’ creditors have no recourse against us. The assets of two of our consolidated controlled builders can only be used to settle obligations of those controlled builders. The assets of our VIEs that can be used only to settle obligations of the VIEs as of March 31, 2018 totaled $49.0 million , of which $0.8 million was cash and $44.0 million was inventory. The assets of our VIEs that could be used only to settle obligations of the VIEs as of December 31, 2017 totaled $52.2 million , of which $0.9 million was cash and $47.8 million was inventory. Segment Information In accordance with ASC 280, Segment Reporting (“ASC 280”), 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 identifies its CODM as four key executives—the Chief Executive Officer, Chief Financial Officer, President of Texas Region and Chief Accounting Officer. In determining the most appropriate reportable segments, the CODM considers similar economic and other characteristics, including geography, class of customers, product types and production processes. The Company’s operations are organized into two reportable segments: builder operations and land development. Builder operations consists of two operating segments: Texas and Georgia. The operations of the Company’s controlled builders were aggregated into the Texas and Georgia operating segments based on 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 are reported as a non-operating segment and include activities which support the Company’s builder operations, land development and title operations through centralization of certain administrative functions such as finance, treasury, information technology and human resources, as well as development of strategic initiatives. Unallocated corporate expenses are reported in the corporate and other segment as these activities do not share a majority of aggregation criteria with either the builder operations or land development operating segments. While Green Brick Title, LLC (“Green Brick Title”) operations are not economically similar to either builder operations or land development, the results of such operations do 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 corporate and other segment. The Company uses the equity method of accounting for its investment in an unconsolidated entity (Challenger Subsidiary) over which it exercises significant influence but does not have a controlling interest. The Challenger Subsidiary constructs townhouses, single family homes and luxury patio homes, and is headquartered in Colorado Springs, Colorado. While the operations of the Challenger Subsidiary meet the criteria for an operating segment within the builder operations segment, such operations did not meet the quantitative thresholds, as discussed in ASC 280, to be separately reported and disclosed. As such, Challenger Subsidiary’s results are included within the corporate and other segment. Recent Accounting Pronouncements The Company adopted Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers , on January 1, 2018. ASU 2014-09 was codified into ASC 606, Revenue from Contracts with Customers (“ASC 606”). The Company adopted ASC 606 using the modified retrospective method applied to contracts which were not completed as of January 1, 2018, which required the cumulative effect of the initial application of the new standard, if any, to be reflected as an adjustment to the opening balance of retained earnings as of January 1, 2018. The Company’s revenue recognition disclosures expanded significantly under ASC 606, specifically related to the quantitative and qualitative information about performance obligations, information about contract balances, changes in contract assets and liabilities and disaggregation of revenue. The adoption of ASC 606 did not have a material effect on the Company’s condensed consolidated statements of income and there was no cumulative effect on the opening balance of retained earnings as of January 1, 2018. As a result of the adoption of ASU 2014-09, costs related to model home furnishings are no longer capitalizable as inventory; however, such costs are capitalizable as fixed assets. As of March 31, 2018 , $1.3 million of model home furnishings costs were included in property and equipment, net compared to $1.1 million included in inventory as of December 31, 2017 . The related depreciation expense of $0.3 million is included in selling, general and administrative expense for the three months ended March 31, 2018 as opposed to $0.2 million included in cost of sales for the three months ended March 31, 2017 . See Note 4 . The adoption of ASU 2014-09 did not require significant changes to the Company's internal controls and procedures over financial reporting and disclosures. However, we have made enhancements to existing internal controls and procedures to ensure compliance with the disclosure requirements of the new standard. In February 2016, FASB issued ASU 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 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 was adopted by the Company on January 1, 2018 . The adoption of this standard did not have a material effect on the Company's consolidated financial statements and related disclosures. In November 2016, FASB issued ASU 2016-18, Statement 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 was effective for the Company beginning January 1, 2018; however, the Company elected to early adopt this standard as of January 1, 2017. As a result of the adoption of this standard, the Company no longer presents the change in restricted cash in the operating activities section of the 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 was effective for the Company beginning on January 1, 2018 . The adoption of this standard did not have a material effect on the Company's consolidated financial statements and related disclosures. 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 was effective for the Company beginning on January 1, 2018 . The adoption of this standard did not have a material effect on the Company's consolidated financial statements and related disclosures.

Net Income Attributable to Gree

Net Income Attributable to Green Brick Partners, Inc. Per Share	3 Months Ended
	Mar. 31, 2018
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 March 31, 2018 2017 Net income attributable to Green Brick Partners, Inc. per share: Net income attributable to Green Brick Partners, Inc. $ 11,203 $ 6,197 Weighted-average number of shares outstanding —basic 50,577 48,958 Basic net income attributable to Green Brick Partners, Inc. per share $ 0.22 $ 0.13 Weighted-average number of shares outstanding —basic 50,577 48,958 Dilutive effect of stock options and restricted stock awards 141 59 Weighted-average number of shares outstanding —diluted 50,718 49,017 Diluted net income attributable to Green Brick Partners, Inc. per share $ 0.22 $ 0.13 There were no potentially dilutive securities with antidilutive effect for the three months ended March 31, 2018 and 2017 that could potentially dilute earnings per share in the future.

Inventory

Inventory	3 Months Ended
	Mar. 31, 2018
Inventory Disclosure [Abstract]
Inventory	INVENTORY Inventory consists of land in the process of development, developed lots, completed homes, model homes and raw land scheduled for development. Inventory is valued at cost unless the carrying value is determined to be not recoverable in which case the affected inventory is written down to net realizable value. Cost includes any related pre-acquisition costs that are directly identifiable with a specific property so long as those pre-acquisition costs are anticipated to be recoverable at the sale of the property. A summary of inventory is as follows (in thousands): March 31, 2018 December 31, 2017 Completed home inventory and residential lots held for sale $ 117,889 $ 106,043 Work in process and land under development 410,610 389,612 Total inventory $ 528,499 $ 495,655 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. A summary of interest costs incurred, capitalized and expensed is as follows (in thousands): Three Months Ended March 31, 2018 2017 Interest capitalized at beginning of period $ 10,474 $ 9,417 Interest incurred 1,628 893 Interest charged to cost of sales (881 ) (875 ) Interest capitalized at end of period $ 11,221 $ 9,435

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition	REVENUE RECOGNITION The Company adopted ASC 606 as of January 1, 2018 using the modified retrospective method which requires the cumulative effect of the initial application of the new standard, if any, to be reflected as an adjustment to the opening balance of retained earnings as of January 1, 2018. There was no cumulative effect of the initial application of ASC 606 on the Company's consolidated financial statements. Contracts with Customers The Company derives revenues from two primary sources: the closing and delivery of homes through our builder operations segment and the sale of lots through our land development segment to homebuilders. All of our revenue is from contracts with customers. Disaggregation of Revenue The following reflects the disaggregation of revenue by primary geographic market, type of customer, product type, and timing of revenue recognition (in thousands): Three Months Ended March 31, 2018 Three Months Ended March 31, 2017 Builder Operations Land Development Builder Operations Land Development Primary Geographic Market Texas homebuilding $ 71,548 $ — $ 50,670 $ — Georgia homebuilding 48,818 — 42,727 — Texas land development — 3,999 — 5,753 Georgia land development — 3,900 — 187 Total revenues $ 120,366 $ 7,899 $ 93,397 $ 5,940 Type of Customer Homebuyers $ 120,366 $ — $ 93,397 $ — Homebuilders — 7,899 — 5,940 Total revenues $ 120,366 $ 7,899 $ 93,397 $ 5,940 Product Type Residential units $ 120,366 $ — $ 93,397 $ — Land and lots — 7,899 — 5,940 Total revenues $ 120,366 $ 7,899 $ 93,397 $ 5,940 Timing of Revenue Recognition Transferred at a point in time $ 120,366 $ 7,899 $ 93,397 $ 5,940 Total revenues $ 120,366 $ 7,899 $ 93,397 $ 5,940 Contract Balances The Company requires homebuyers to submit a deposit for home purchases and for third-party builders to submit a deposit in connection with land sale or lot option contracts. The deposits serve as a guarantee for performance under homebuilding and land sale or development contracts. Cash received as customer deposits is reflected as customer and builder deposits on the condensed consolidated balance sheets. Contract balances included in customer and builder deposits on the condensed consolidated balance sheets are as follows (in thousands): March 31, 2018 December 31, 2017 March 31, 2017 December 31, 2016 Customer and builder deposits $ 22,698 $ 21,447 $ 17,067 $ 14,088 The difference between the opening and closing balances of customer and builder deposits results from the timing difference between the customer’s payment of a deposit and the Company’s performance, impacted slightly by terminations of contracts. The amount of homebuyer deposits on residential units held as of the beginning of the period and recognized as revenue during the three months ended March 31, 2018 and 2017 was $3.2 million and $2.3 million , respectively. The amount of homebuilder deposits on land and lots held as of the beginning of the period and recognized as revenue during the three months ended March 31, 2018 and 2017 was $0.2 million and $0.3 million , respectively. Performance Obligations The Company’s contracts with homebuyers contain a single performance obligation. The performance obligation is satisfied when the home is completed and legal title has been transferred to the buyer. The Company does not have any variable consideration associated with home sales transactions. Lot option contracts contain multiple performance obligations. The performance obligations are satisfied as the lots are closed and legal title has been transferred to the builder. For lot option contracts, individual performance obligations are accounted for separately. The transaction price is allocated to the separate performance obligations on a relative stand-alone selling price basis. Certain lot option contracts require escalations in lot price over the option period. Any escalator is not collectible until the lot closing occurs. While we recognize lot escalators as variable consideration within the transaction price, we do not recognize escalator revenue until a builder closes on a lot subject to an escalator as the escalator relates to general inflation and holding costs. Occasionally, the Company sells developed and undeveloped land parcels. If the land parcel is developed prior to the sale of the land, the revenue is recognized at closing since we deliver a single performance obligation in the form of a developed parcel. We also recognize revenue at closing on undeveloped land parcel sales as there are no other obligations beyond delivering the undeveloped land. Homebuyers are not obligated to pay for a home until the closing and delivery of the home; the selling price of a home is based on the contract price adjusted for any change orders, which are considered modifications of the contract price. Our homebuilder customers are not obligated to pay for developed lots prior to control of the lots and any associated improvements being transferred to them. The term of our lot option contracts is generally based upon the number of lots being purchased and the agreed upon lot takedown schedule, which can be in excess of one year. Lots cannot be taken down until development is substantially complete. There is no significant financing component related to our third-party lot sales. The Company does not sell warranties outside of the customary workmanship warranties provided on homes or developed lots at the time of sale. The warranties offered to homebuyers and to customers of developed lots are short term, with the exception of ten-year warranties on structural concerns for homes. As these are assurance-type warranties, there is no separate performance obligation related to warranties provided. There was no revenue recognized during the three months ended March 31, 2018 and 2017 from performance obligations satisfied in prior periods. Transaction Price Allocated to the Remaining Performance Obligations The aggregate amount of transaction price allocated to the remaining performance obligations on our land sale and lot option contracts is $107.4 million . The Company will recognize the remaining revenue when the lots are taken down, or upon closing for the sale of a land parcel, which is expected to occur as follows (in thousands): Total Remainder of 2018 $ 35,773 2019 47,500 2020 19,567 2021 4,536 Total $ 107,376 The lot takedowns are contingent upon a number of factors, including customer needs, the number of lots being purchased, receipt of acceptance of the plat by the municipality, weather-related delays, and agreed-upon lot takedown schedules. Our contracts with homebuyers have a duration of less than one year. As such, the Company uses the practical expedient as allowed under ASC 606 and has not disclosed the transaction price allocated to remaining performance obligations as of the end of the reporting period. Significant Judgments and Estimates There are no significant judgments involved in the recognition of completed home sales. The performance obligation of delivering a completed home is satisfied upon the sale closing when title transfers to the homebuyer. There are no significant judgments involved in the recognition of land sales or developed lots sales. The performance obligation of delivering land or developed lots is satisfied upon the closing of the sale when title transfers to the homebuilder. Contract Costs In connection with the adoption of ASC 606, the Company adopted ASC 340-40, Other Assets and Deferred Costs - Contracts with Customers , with respect to capitalization and amortization of incremental costs of obtaining a contract. The Company recognizes an asset for the incremental costs of obtaining a contract with a customer if it expects to recover those costs. The Company pays sales commissions to employees and/or outside realtors related to individual home sales which are expensed as incurred at the time of closing. Commissions on the sale of land parcels are also expensed as incurred upon closing. The Company also pays quarterly builder incentives to employees which are based on the time it takes to build individual homes. The builder incentives do not represent incremental costs that would require capitalization as we would incur these costs whether or not we sold the home. As such, we will continue to recognize builder incentives as salary expense at the time they are paid. Costs incurred for model homes, advertising, and sales salaries do not qualify for capitalization under ASC 340-40 as they are not incremental costs of obtaining a contract. As such, we expense these costs to selling, general and administrative expense and salary expense as incurred. Costs incurred related to model home furnishings are capitalized and included in property and equipment, net.

Business Combination

Business Combination	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Business Combination	BUSINESS COMBINATION On April 26, 2018 , the Company acquired all of the assets of GHO Homes and affiliates and acquired an 80% controlling equity interest in a newly formed subsidiary, GRBK GHO Homes, LLC (“GRBK GHO”). The previous owner of GHO Homes will continue to serve as president and will be a 20% partner in GRBK GHO. GRBK GHO operates primarily in the Vero Beach, Florida market and is engaged in land and lot development and all aspects of the homebuilding process. The acquisition allowed us to expand our operations into a new geographic market, constructing townhouses, single family homes, patio homes, and luxury homes. The total consideration consisted of $33.2 million paid to the owner of GHO Homes, which is subject to a purchase price adjustment based on the final audited balance sheet of GHO Homes as of the closing date. The owner of GHO Homes contributed $8.3 million to GRBK GHO for his 20% interest in GRBK GHO. Under the terms of the purchase agreement, we may be obligated to pay additional consideration if certain performance targets are met for any calendar year, or portion thereof, over the three -year period following the acquisition date. As of May 7, 2018 , we had not finalized the purchase price accounting for the acquisition due to the minimal amount of time between the acquisition date and the filing of the Quarterly Report on Form 10-Q. The identification and valuation of the tangible assets acquired and identifiable intangible assets are not yet complete. In addition, transaction costs, including legal fees, related to the closing are still being incurred. During the completion of the purchase price accounting, we will also evaluate the deductibility of goodwill for tax purposes and assess the useful lives of identified intangible assets. As of March 31, 2018 , we had incurred integration costs of approximately $32.3 thousand , which have been expensed as incurred and are included in selling, general and administrative expense.

Debt

Debt	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Debt	DEBT Lines of Credit Lines of credit outstanding as of March 31, 2018 and December 31, 2017 consist of the following (in thousands): March 31, 2018 December 31, 2017 Revolving credit facility $ 45,000 $ 32,000 Unsecured revolving credit facility 90,000 75,000 Total lines of credit $ 135,000 $ 107,000 Revolving Credit Facility On July 30, 2015 , the Company entered into a revolving credit facility (the “Credit Facility”) with Inwood National Bank which initially provided 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 Bank of America, N.A. “Prime Rate” (the “Index”) with adjustments to the interest rate being made on the effective date of any change in the Index. 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 March 31, 2018 , the interest rate on outstanding borrowings under the Credit Facility was 4.75% per annum. On May 3, 2016, the Company amended the Credit Facility and extended the maturity date to May 1, 2019 . 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 commitment amount over a trailing 12 month period is due on or before August 1 st of each year. Costs of $0.1 million associated with the amendment were deferred and are included in other assets, net in the 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. During 2017, the Company amended the Credit Facility several times for the purpose of adding additional land holdings as collateral. On October 27, 2017 , the Company amended the Credit Facility to increase the commitment amount from $50.0 million to $75.0 million . This amendment temporarily waived the borrowing base through March 31, 2018, after which the borrowing base was reinstated. During the temporary borrowing base waiver, the Credit Facility was governed by a loan-to-value ratio not to exceed 70% . Under the terms of the amended Credit Facility, the Company is required 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 as of March 31, 2018 . Unsecured Revolving Credit Facility On December 15, 2015, the Company entered into a credit agreement (the “Credit Agreement”) with the lenders named therein, and Citibank, N.A. ("Citibank"), as administrative agent, providing for a senior, unsecured revolving credit facility with an aggregate lending commitment of $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 . Citibank 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 at rates equal to either: (a) 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) one-month LIBOR plus 1.0% , in each case plus 1.5% ; or (b) in the case of Eurodollar rate advances, the reserve adjusted LIBOR plus 2.5% . Interest is payable quarterly in arrears on the last day of each March, June, September and December. As of March 31, 2018 , the interest rate on outstanding borrowings under the Unsecured Revolving Credit Facility was 4.32% per annum. The Company pays the lenders a commitment fee on the amount of the unused commitments on a quarterly basis at a rate equal to 0.45% per annum. Outstanding borrowings under the Unsecured Revolving Credit Facility are subject to 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, as administrative agent. The First Amendment added Flagstar Bank as a lender, 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, as administrative agent. The Second Amendment 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 required an upfront fee of 0.15% of the aggregate amount of extended commitments on December 15, 2016. Additionally, Citibank increased its commitment from $25.0 million to $35.0 million , which increased the aggregate lending commitment available under the Unsecured Revolving Credit Facility from $60.0 million to $70.0 million . On March 6, 2017, Flagstar Bank increased its commitment 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 condensed 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, as administrative agent. 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 commitment available under the Unsecured Revolving Credit Facility from $85.0 million to $130.0 million . The Third Amendment also increased the maximum aggregate amount of the Unsecured Revolving Credit Facility from $110.0 million to $200.0 million . 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 appointed Flagstar Bank in the roles of sole lead arranger and administrative agent. Costs of $0.4 million associated with the Third Amendment were deferred and are included in other assets, net in the condensed 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 December 1, 2017, the Company entered into a Fourth Amendment to the Credit Agreement (the “Fourth Amendment”), with the lenders named therein, and Flagstar Bank, as administrative agent. The Fourth Amendment extended the termination date with respect to commitments to December 14, 2020. The extension required an upfront fee of 0.15% of the aggregate amount of extended commitments on December 15, 2017 which was deferred and included in other assets, net in our consolidated balance sheets. The Company is amortizing these debt insurance costs to interest expense over the term of the Unsecured Revolving Credit Facility using the straight-line method. On March 12, 2018, the Company, Flagstar Bank, as administrative agent, and JPMorgan Chase Bank, N.A. (“JPMorgan”) executed a new lender supplement to add JPMorgan as a lender under the Credit Agreement, with an initial commitment of $30.0 million , which increased the aggregate lending commitment available under the Unsecured Revolving Credit Facility from $130.0 million to $160.0 million . The increased borrowing capacity became effective March 27, 2018 . Under the terms of the Unsecured Revolving Credit Facility, the Company is required to maintain compliance with various financial covenants, including a maximum leverage ratio, a minimum interest coverage ratio, and a minimum consolidated tangible net worth. The Company was in compliance with these financial covenants as of March 31, 2018 . Notes Payable Notes payable outstanding as of March 31, 2018 and December 31, 2017 consist of the following (in thousands): March 31, 2018 December 31, 2017 Briar Ridge Investments, LTD $ 9,000 $ 9,000 Graham Mortgage Corporation 914 926 Total notes payable $ 9,914 $ 9,926 Briar Ridge Investments, LTD 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% , and collateralized by land in Allen, Texas. Accrued interest as of March 31, 2018 was $0.1 million . In December 2016, this note was extended through December 31, 2018. Graham Mortgage Corporation 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. Accrued interest as of March 31, 2018 was $42.8 thousand .

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS’ EQUITY A summary of changes in stockholders’ equity is as follows (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, 2017 50,598,901 $ 506 $ 289,938 $ 125,903 $ 416,347 $ 16,691 $ 433,038 Share-based compensation — — 71 — 71 — 71 Issuance of common stock under 2014 Omnibus Equity Incentive Plan, net of shares withheld for employee taxes 66,798 1 668 — 669 — 669 Amortization of deferred share-based compensation — — 96 — 96 — 96 Common stock issued in connection with the investment in the Challenger Subsidiary 20,000 — — — — — — Distributions — — — — — (8,045 ) (8,045 ) Net income — — — 11,203 11,203 2,036 13,239 Balance as of March 31, 2018 50,685,699 $ 507 $ 290,773 $ 137,106 $ 428,386 $ 10,682 $ 439,068 Common Stock Pursuant to the Company’s amended and restated certificate of incorporation (“Certificate of Incorporation”), the Company is authorized to issue up to 100,000,000 shares of common stock, par value $0.01 per share. As of March 31, 2018 , there were 50,685,699 shares of common stock issued and outstanding. During the three months ended March 31, 2018 , 20,000 shares of common stock were issued as additional consideration for the investment in Challenger Subsidiary upon resolution of terms for such holdback shares. Preferred Stock Pursuant to the Company’s Certificate of Incorporation, the Company is authorized to issue up to 5,000,000 shares of preferred stock, par value $0.01 per share. The Board of Directors (“BOD”) has the authority, subject to any limitations imposed by law or NASDAQ listing rules, without further action by the stockholders, to issue such preferred stock in one or more series and to fix the voting powers, if any, the preferences and relative, participating, optional or other special rights or privileges, if any, of such series and the qualifications, limitations or restrictions thereof. These rights, preferences and privileges may include, but are not limited to, dividend rights, conversion rights, voting rights, terms of redemption, liquidation preferences, sinking fund terms and the number of shares constituting any series or the designation of that series. As of March 31, 2018 , there were no shares of preferred stock issued and outstanding. Share Repurchase Program In March 2016, the Company’s BOD authorized a share repurchase program of up to 1,000,000 shares of its common stock. The share repurchase program expired in 2017. No shares were repurchased under the program. Section 382 Transfer Restrictions If we were to experience an ownership change, Section 382 of the Internal Revenue Code imposes an annual limitation which could impact the utilization of our net operating loss carryforwards. To reduce the likelihood of such an ownership change, our BOD implemented certain transfer restrictions, including Article V of the Company’s Certificate of Incorporation, and a Section 382 rights agreement regarding preservation of our net operating loss carryforwards. On March 27, 2014, the BOD declared a dividend of one preferred share purchase right with respect to each outstanding share of common stock to purchase one one-thousandth of a share of Series B Junior Participating Preferred Stock, par value $0.01 per share, at a price of $30.00 per one one-thousandth of a share, subject to adjustment as provided in the Section 382 rights agreement. The dividend was payable to stockholders of record at the close of business on April 7, 2014. As of March 31, 2018 , the rights agreement has not been triggered.

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION The Company measures and accounts for share-based awards in accordance with ASC 718, Compensation - Stock Compensation . The Company expenses share-based payment awards made to employees and directors, including stock options and restricted stock awards. Share-based compensation expense associated with stock options and restricted stock awards with vesting contingent upon the achievement of service conditions is recognized on a straight-line basis, net of estimated forfeitures, over the requisite service period over which the awards are expected to vest. The Company estimates the 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 three months ended March 31, 2018 , the Company granted restricted stock awards (“RSAs”) under its 2014 Omnibus Equity Incentive Plan to Named Executive Officers (“NEOs”). The RSAs granted to the NEOs were 100% vested and non-forfeitable on the grant date. The fair value of the RSAs were recorded as share-based compensation expense on the grant date. The Company withheld 39,228 shares of common stock from NEOs, at a total cost of $0.4 million , to satisfy statutory minimum tax requirements related to the RSAs. A summary of shared-based awards activity during the three months ended March 31, 2018 is as follows: Number of Shares (in thousands) Weighted Average Grant Date Fair Value per Share Nonvested, December 31, 2017 38 $ 10.25 Granted 106 $ 9.95 Vested (106 ) $ 9.95 Forfeited — $ — Nonvested, March 31, 2018 38 $ 10.25 A summary of stock option activity during the three months ended March 31, 2018 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, 2017 500 $ 7.49 Granted — — Exercised — — Forfeited — — Options outstanding, March 31, 2018 500 $ 7.49 6.57 $ 1,705 Options exercisable, March 31, 2018 300 $ 7.49 6.57 $ 1,023 A summary of our unvested stock options during the three months ended March 31, 2018 is as follows: Number of Shares (in thousands) Weighted Average Per Share Grant Date Fair Value Unvested, December 31, 2017 200 $ 2.88 Granted — $ — Vested — $ — Forfeited — $ — Unvested, March 31, 2018 200 $ 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 granted during the three months ended March 31, 2018 and March 31, 2017 . Share-Based Compensation Expense Share-based compensation expense was $1.2 million and $1.9 million for the three months ended March 31, 2018 and March 31, 2017 , respectively. As of March 31, 2018 , the estimated total remaining unamortized share-based compensation expense related to unvested restricted stock awards, net of forfeitures, was $0.1 million , which is expected to be recognized over a weighted-average period of 0.1 years. As of March 31, 2018 , the estimated total remaining unamortized share-based compensation expense related to stock options, net of forfeitures, was $0.5 million which is expected to be recognized over a weighted-average period of 1.6 years.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES We recorded an income tax provision of $3.4 million and $3.9 million for the three months ended March 31, 2018 and March 31, 2017 , respectively. The effective tax rate for the three months ended March 31, 2018 and March 31, 2017 was 20.3% and 32.1% , respectively. On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act, among other things, reduced the U.S. federal corporate tax rate from 35% to 21% effective January 1, 2018 and imposes significant limitations on certain corporate deductions and credits. The Tax Act places future limitations on the usage of net operating loss carryforwards generated in the year ended December 31, 2018 and after. The Tax Act is comprehensive, containing several other provisions, some of which will not materially impact the Company. The estimates of the Tax Act may be adjusted in future periods as required. Future implementation guidance from the Internal Revenue Service, clarifications of state tax law, or the completion of the Company’s 2017 tax return filings could all affect the estimated financial statement impact of the Tax Act. The SEC staff issued Staff Accounting Bulletin 118 which allows for a measurement period of up to one year after the enactment date of the Tax Act to finalize the recording of the related tax impacts. The Company does not believe potential adjustments in future periods would materially impact the Company’s financial condition or results of operations. The decrease in the effective tax rate for the three months ended March 31, 2018 is due to the impact of compliance with the Tax Act, discrete tax items and the change in the ratio of noncontrolled earnings relative to pre-tax income. The Company has not recorded any measurement period adjustments under Staff Accounting Bulletin 118 in the three months ended March 31, 2018 .

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS During the three months ended March 31, 2018 and 2017 , 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. Green Brick’s ownership interest in Centre Living is 50% and Trevor Brickman’s ownership interest is 50% . 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 $115,740 and $56,445 as of March 31, 2018 and December 31, 2017 , 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 resulted in a margin of approximately 13% . The home was completed in 2017 and the Company 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 contract in place, the Company purchased $0.5 million in lots during the three months ended March 31, 2017 . There were no lots remaining to be purchased as of December 31, 2017 . During March 2016, the Company purchased undeveloped land for development of an 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 land for sale of the lots to TPG. Contributions and profits are shared 80% by the Company and 20% by the affiliated entity. Total capital contributions through March 31, 2018 are $11.7 million . There were no contributions made to, or distributions received from, the partnership in the three months ended March 31, 2018 . Total contributions to the partnership during the three months ended March 31, 2017 were $0.4 million , of which 80% was paid by the Company. Total distributions from the partnership during the three months ended March 31, 2017 were $5.0 million , of which $4.0 million , was paid to the Company. The Company has consolidated the entity’s results of operations and financial condition into its financial statements based on our 80% ownership. During March 2016, the Company purchased undeveloped land for development of a 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 land for sale of the lots to TPG. Contributions and profits are shared 50% by the Company and 50% by the affiliated entity. Total capital contributions through March 31, 2018 are $2.5 million . There were no contributions made to the partnership in the three months ended March 31, 2018 or 2017 . Total distributions made by the partnership during the three months ended March 31, 2018 and 2017 were $0.7 million and $0.4 million , respectively, of which $0.3 million and $0.2 million , respectively, was paid to the Company. The Company holds two of the three board seats and is able to exercise control over the operations of the partnership, and therefore has consolidated the entity’s results of operations 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 Company purchased the remaining 26 lots during the year ended December 31, 2017 for $3.3 million , of which $0.7 million was paid during the three months ended March 31, 2017 . In February 2017, Richard A. Costello paid a $110,000 deposit to Centre Living Homes, LLC on a townhome. During the fourth quarter of 2017, Mr. Costello closed on the townhome for approximately $525,000 . In accordance with the Company’s employee discount policy, the contract price resulted in a margin of approximately 13% . In February 2017, Jed Dolson paid a $110,000 deposit to Centre Living Homes, LLC on a townhome. During the fourth quarter of 2017, as allowed for in the Company’s employee discount policy, Mr. Dolson assigned his rights to purchase the townhome to his sister-in-law. The townhome was sold in the fourth quarter of 2017 for approximately $475,000 . In accordance with the Company’s employee discount policy, the contract price resulted in a margin of approximately 13% .

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2018
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, restricted cash, accounts receivable, earnest money deposits, other assets, accounts payable, accrued expenses, customer and builder deposits, borrowings on lines of credit, and notes payable. Per the fair value hierarchy, level 1 financial instruments include: cash, 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. Due to the short-term nature and floating interest rate terms, the carrying amounts of notes payable and borrowings on lines of credit are deemed to approximate fair value. The Company estimates that, due to the 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 March 31, 2018 and December 31, 2017 . Fair Value of Nonfinancial Instruments Nonfinancial assets and liabilities include items such as inventory which is measured at cost unless the carrying value is determined to be not recoverable in which case the affected instrument is written down to net realizable 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, these items are level 3 nonfinancial instruments. During the three months ended March 31, 2018 and March 31, 2017 , 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	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Letters of Credit During the ordinary course of business, certain regulatory agencies and municipalities require the Company to post letters of credit. Such letters of credit are issued by financial institutions and commit the issuer to pay specified amounts to the holder of the letter of credit if the holder demonstrates that the Company has failed to perform under the relevant contract. If this were to occur, the Company would be required to reimburse the issuer of the letter of credit. The expiration dates of the letters of credit coincide with the expected completion dates of the related projects. If the obligations related to a project are ongoing, the letters of credit are automatically extended, without amendment, for one year. As of March 31, 2018 and December 31, 2017 , letters of credit outstanding totaled $0.2 million and $0.2 million , respectively. The Company does not believe that it is likely that any material claims will be made under a letter of credit in the foreseeable future. Warranties The Company offers homeowners a comprehensive third party warranty on each home. Homes are generally covered by a one year warranty for defects and products used, two years for electrical, mechanical and plumbing systems, and ten years for qualified and defined structural defects. Developed lot sales are generally covered by a customary one year warranty on excavation and retaining walls. The Company accrues an estimate of its exposure to warranty claims based on both current and historical home sales data and warranty costs incurred. Warranty accruals are included within accrued expenses in the condensed consolidated balance sheets. Warranty activity consists of the following (in thousands): Three Months Ended March 31, 2018 2017 Beginning balance $ 2,083 $ 1,210 Additions 434 312 Charges (281 ) (191 ) Ending balance $ 2,236 $ 1,331 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 selling, general and administrative expense in the condensed consolidated statements of income. Land and Lot Option Contracts In the ordinary course of business, the Company enters into land and lot option contracts in order to procure land for the construction of homes in the future. Earnest money deposits act as security for such contracts. 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	3 Months Ended
	Mar. 31, 2018
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 March 31, (in thousands) 2018 2017 Revenues: (1) Builder operations Texas $ 71,548 $ 50,670 Georgia 52,718 42,727 Land development 3,999 5,940 Corporate and other (2) — — Total revenues $ 128,265 $ 99,337 Gross profit: (1) Builder operations Texas $ 17,017 $ 12,310 Georgia 11,864 9,348 Land development 1,285 1,828 Corporate and other (2) (3,036 ) (2,200 ) Total gross profit $ 27,130 $ 21,286 Income (loss) before taxes: Builder operations Texas $ 11,100 $ 8,375 Georgia 7,978 6,102 Land development 1,019 1,505 Corporate and other (2)(3) (3,486 ) (3,867 ) Total income (loss) before taxes $ 16,611 $ 12,115 March 31, 2018 December 31, 2017 Inventory: Builder operations Texas $ 113,320 $ 110,872 Georgia 101,996 99,613 Land development 299,761 272,542 Corporate and other (2)(4) 13,422 12,628 Total inventory $ 528,499 $ 495,655 (1) Builder operations segment revenue does not equal revenue from the sale of residential units included in the consolidated statements of income in periods when our controlled builders have sales of land or lots, which for the three months ended March 31, 2018 and 2017 were $3.9 million and $0.0 million , respectively. Revenue from such sales is included in builder operations segment revenue as it relates to builder operations, and included in revenue from sale of land and lots in the condensed consolidated statements of income. (2) Corporate and other is comprised principally of general corporate expenses associated with administrative functions such as finance, treasury, information technology and human resources. (3) Corporate and other income (loss) before taxes includes results from Green Brick Title and Challenger Subsidiary. (4) Corporate and other inventory consists of capitalized overhead and interest related to work in process and land under development.

Basis of Presentation and Sig19

Basis of Presentation and Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying 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 the consolidated financial statements and accompanying notes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017 . Our operating results for the three months ended March 31, 2018 are not necessarily indicative of the results that may be expected for any future periods.
Principles of Consolidation	Principles of Consolidation The Company evaluated its wholly-owned subsidiaries and controlled builders under ASC 810, Consolidation (“ASC 810”) and concluded that each controlled builder is a variable interest entity (“VIE”). The Company owns a 50% equity interest and has 51% of the voting interest in each controlled builder. In addition, the Company holds two of the three board seats for each controlled builder and is able to exercise control over the operations of each controlled builder. The Company accounts for its controlled builders under the variable interest model and is the primary beneficiary of each controlled builder in accordance with ASC 810. Therefore, the financial statements of the controlled builders are consolidated in the condensed consolidated financial statements following the variable interest model. All intercompany balances and transactions have been eliminated in consolidation. The Company uses the equity method of accounting for its investment in an unconsolidated entity over which it exercises significant influence but does not have a controlling interest. Under the equity method, the Company’s share of the unconsolidated entity’s earnings or losses, 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.
Variable Interest Entities and Noncontrolling Interests	Variable Interest Entities and Noncontrolling Interests The Company accounts for VIEs in accordance with ASC 810. In accordance with ASC 810, an entity is a VIE when: (a) the equity investment at risk in the entity is not sufficient to permit the entity to finance its activities without additional subordinated financial support provided by other parties, including the equity holders; (b) the entity’s equity holders as a group either (i) lack the direct or indirect ability to make decisions about the entity, (ii) are not obligated to absorb expected losses of the entity, or (iii) do not have the right to receive expected residual returns of the entity; or (c) the entity’s equity holders have voting rights that are not proportionate to their economic interests, and the activities of the entity involve or are conducted on behalf of the equity holder with disproportionately few voting rights. If an entity is deemed to be a VIE pursuant to ASC 810, the enterprise that has both (i) the power to direct the activities of the VIE that most significantly impacts the entity’s economic performance and (ii) the obligation to absorb the expected losses of the entity or right to receive benefits from the entity that could be potentially significant to the VIE is considered the primary beneficiary and must consolidate the VIE. In accordance with ASC 810, the Company performs ongoing reassessments of whether it is the primary beneficiary of a VIE. The Company owns 50% equity interests in several controlled builders deemed to be VIEs under ASC 810 for which the Company is considered the primary beneficiary. Our controlled builders are engaged in all aspects of the homebuilding process in residential neighborhoods and master planned communities in premium locations in the Dallas and Atlanta markets. We sell finished lots or option lots from third-party developers to our controlled builders for their homebuilding operations and provide them with construction financing and strategic planning. The board of managers of each of the controlled builders has the power to direct the activities that significantly impact the controlled builder’s economic performance. Pursuant to the Company’s agreements with each controlled builder, it has the ability to appoint two of the three members of the board of managers of each controlled builder’s board of managers. A majority of the board of managers constitutes a quorum to transact business. No action can be approved by the board of managers without the approval from at least one individual whom the Company has appointed at each controlled builder. The Company has the ability to control the activities of each controlled builder that most significantly impact the controlled builder’s economic performance. Such activities include, but are not limited to, involvement in the day to day capital and operating decisions, the ability to determine the budget and plan, the ability to control financing decisions, and the ability to acquire additional land or dispose of land. In addition, the Company has the right to receive the expected residual returns and obligation to absorb the expected losses of each controlled builder through the pro rata profits and losses we are allocated based on our ownership interest. Therefore, the financial statements of the controlled builders are consolidated in the Company’s condensed consolidated financial statements following the variable interest model. The noncontrolling interests attributable to the 50% minority interests owned by our controlled builders are included as noncontrolling interests in the Company’s condensed consolidated financial statements.
Segment Information	Segment Information In accordance with ASC 280, Segment Reporting (“ASC 280”), 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 identifies its CODM as four key executives—the Chief Executive Officer, Chief Financial Officer, President of Texas Region and Chief Accounting Officer. In determining the most appropriate reportable segments, the CODM considers similar economic and other characteristics, including geography, class of customers, product types and production processes. The Company’s operations are organized into two reportable segments: builder operations and land development. Builder operations consists of two operating segments: Texas and Georgia. The operations of the Company’s controlled builders were aggregated into the Texas and Georgia operating segments based on 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 are reported as a non-operating segment and include activities which support the Company’s builder operations, land development and title operations through centralization of certain administrative functions such as finance, treasury, information technology and human resources, as well as development of strategic initiatives. Unallocated corporate expenses are reported in the corporate and other segment as these activities do not share a majority of aggregation criteria with either the builder operations or land development operating segments. While Green Brick Title, LLC (“Green Brick Title”) operations are not economically similar to either builder operations or land development, the results of such operations do 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 corporate and other segment. The Company uses the equity method of accounting for its investment in an unconsolidated entity (Challenger Subsidiary) over which it exercises significant influence but does not have a controlling interest. The Challenger Subsidiary constructs townhouses, single family homes and luxury patio homes, and is headquartered in Colorado Springs, Colorado. While the operations of the Challenger Subsidiary meet the criteria for an operating segment within the builder operations segment, such operations did not meet the quantitative thresholds, as discussed in ASC 280, to be separately reported and disclosed. As such, Challenger Subsidiary’s results are included within the corporate and other segment.
Recent Accounting Pronouncements	Recent Accounting Pronouncements The Company adopted Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers , on January 1, 2018. ASU 2014-09 was codified into ASC 606, Revenue from Contracts with Customers (“ASC 606”). The Company adopted ASC 606 using the modified retrospective method applied to contracts which were not completed as of January 1, 2018, which required the cumulative effect of the initial application of the new standard, if any, to be reflected as an adjustment to the opening balance of retained earnings as of January 1, 2018. The Company’s revenue recognition disclosures expanded significantly under ASC 606, specifically related to the quantitative and qualitative information about performance obligations, information about contract balances, changes in contract assets and liabilities and disaggregation of revenue. The adoption of ASC 606 did not have a material effect on the Company’s condensed consolidated statements of income and there was no cumulative effect on the opening balance of retained earnings as of January 1, 2018. As a result of the adoption of ASU 2014-09, costs related to model home furnishings are no longer capitalizable as inventory; however, such costs are capitalizable as fixed assets. As of March 31, 2018 , $1.3 million of model home furnishings costs were included in property and equipment, net compared to $1.1 million included in inventory as of December 31, 2017 . The related depreciation expense of $0.3 million is included in selling, general and administrative expense for the three months ended March 31, 2018 as opposed to $0.2 million included in cost of sales for the three months ended March 31, 2017 . See Note 4 . The adoption of ASU 2014-09 did not require significant changes to the Company's internal controls and procedures over financial reporting and disclosures. However, we have made enhancements to existing internal controls and procedures to ensure compliance with the disclosure requirements of the new standard. In February 2016, FASB issued ASU 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 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 was adopted by the Company on January 1, 2018 . The adoption of this standard did not have a material effect on the Company's consolidated financial statements and related disclosures. In November 2016, FASB issued ASU 2016-18, Statement 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 was effective for the Company beginning January 1, 2018; however, the Company elected to early adopt this standard as of January 1, 2017. As a result of the adoption of this standard, the Company no longer presents the change in restricted cash in the operating activities section of the 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 was effective for the Company beginning on January 1, 2018 . The adoption of this standard did not have a material effect on the Company's consolidated financial statements and related disclosures. 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 was effective for the Company beginning on January 1, 2018 . The adoption of this standard did not have a material effect on the Company's consolidated financial statements and related disclosures.

Net Income Attributable to Gr20

Net Income Attributable to Green Brick Partners, Inc. Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
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 March 31, 2018 2017 Net income attributable to Green Brick Partners, Inc. per share: Net income attributable to Green Brick Partners, Inc. $ 11,203 $ 6,197 Weighted-average number of shares outstanding —basic 50,577 48,958 Basic net income attributable to Green Brick Partners, Inc. per share $ 0.22 $ 0.13 Weighted-average number of shares outstanding —basic 50,577 48,958 Dilutive effect of stock options and restricted stock awards 141 59 Weighted-average number of shares outstanding —diluted 50,718 49,017 Diluted net income attributable to Green Brick Partners, Inc. per share $ 0.22 $ 0.13

Inventory (Tables)

Inventory (Tables)	3 Months Ended
	Mar. 31, 2018
Inventory Disclosure [Abstract]
Schedule of Real Estate Inventory	A summary of inventory is as follows (in thousands): March 31, 2018 December 31, 2017 Completed home inventory and residential lots held for sale $ 117,889 $ 106,043 Work in process and land under development 410,610 389,612 Total inventory $ 528,499 $ 495,655
Summary of Real Estate Inventory Capitalized Interest Costs	A summary of interest costs incurred, capitalized and expensed is as follows (in thousands): Three Months Ended March 31, 2018 2017 Interest capitalized at beginning of period $ 10,474 $ 9,417 Interest incurred 1,628 893 Interest charged to cost of sales (881 ) (875 ) Interest capitalized at end of period $ 11,221 $ 9,435

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following reflects the disaggregation of revenue by primary geographic market, type of customer, product type, and timing of revenue recognition (in thousands): Three Months Ended March 31, 2018 Three Months Ended March 31, 2017 Builder Operations Land Development Builder Operations Land Development Primary Geographic Market Texas homebuilding $ 71,548 $ — $ 50,670 $ — Georgia homebuilding 48,818 — 42,727 — Texas land development — 3,999 — 5,753 Georgia land development — 3,900 — 187 Total revenues $ 120,366 $ 7,899 $ 93,397 $ 5,940 Type of Customer Homebuyers $ 120,366 $ — $ 93,397 $ — Homebuilders — 7,899 — 5,940 Total revenues $ 120,366 $ 7,899 $ 93,397 $ 5,940 Product Type Residential units $ 120,366 $ — $ 93,397 $ — Land and lots — 7,899 — 5,940 Total revenues $ 120,366 $ 7,899 $ 93,397 $ 5,940 Timing of Revenue Recognition Transferred at a point in time $ 120,366 $ 7,899 $ 93,397 $ 5,940 Total revenues $ 120,366 $ 7,899 $ 93,397 $ 5,940
Contract Balances Included in Customer and Builder Deposits on Balance Sheet	Contract balances included in customer and builder deposits on the condensed consolidated balance sheets are as follows (in thousands): March 31, 2018 December 31, 2017 March 31, 2017 December 31, 2016 Customer and builder deposits $ 22,698 $ 21,447 $ 17,067 $ 14,088
Remaining Performance Obligation, Expected Timing of Satisfaction	The Company will recognize the remaining revenue when the lots are taken down, or upon closing for the sale of a land parcel, which is expected to occur as follows (in thousands): Total Remainder of 2018 $ 35,773 2019 47,500 2020 19,567 2021 4,536 Total $ 107,376

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Schedule of Lines of Credit Outstanding	Lines of credit outstanding as of March 31, 2018 and December 31, 2017 consist of the following (in thousands): March 31, 2018 December 31, 2017 Revolving credit facility $ 45,000 $ 32,000 Unsecured revolving credit facility 90,000 75,000 Total lines of credit $ 135,000 $ 107,000
Schedule of Notes Payable Outstanding	Notes payable outstanding as of March 31, 2018 and December 31, 2017 consist of the following (in thousands): March 31, 2018 December 31, 2017 Briar Ridge Investments, LTD $ 9,000 $ 9,000 Graham Mortgage Corporation 914 926 Total notes payable $ 9,914 $ 9,926

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Schedule of Stockholders Equity	A summary of changes in stockholders’ equity is as follows (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, 2017 50,598,901 $ 506 $ 289,938 $ 125,903 $ 416,347 $ 16,691 $ 433,038 Share-based compensation — — 71 — 71 — 71 Issuance of common stock under 2014 Omnibus Equity Incentive Plan, net of shares withheld for employee taxes 66,798 1 668 — 669 — 669 Amortization of deferred share-based compensation — — 96 — 96 — 96 Common stock issued in connection with the investment in the Challenger Subsidiary 20,000 — — — — — — Distributions — — — — — (8,045 ) (8,045 ) Net income — — — 11,203 11,203 2,036 13,239 Balance as of March 31, 2018 50,685,699 $ 507 $ 290,773 $ 137,106 $ 428,386 $ 10,682 $ 439,068

Share-Based Compensation (Table

Share-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-Based Awards Activity	A summary of shared-based awards activity during the three months ended March 31, 2018 is as follows: Number of Shares (in thousands) Weighted Average Grant Date Fair Value per Share Nonvested, December 31, 2017 38 $ 10.25 Granted 106 $ 9.95 Vested (106 ) $ 9.95 Forfeited — $ — Nonvested, March 31, 2018 38 $ 10.25
Summary of Stock Option Activity	A summary of stock option activity during the three months ended March 31, 2018 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, 2017 500 $ 7.49 Granted — — Exercised — — Forfeited — — Options outstanding, March 31, 2018 500 $ 7.49 6.57 $ 1,705 Options exercisable, March 31, 2018 300 $ 7.49 6.57 $ 1,023
Summary of Unvested Stock Options Activity	A summary of our unvested stock options during the three months ended March 31, 2018 is as follows: Number of Shares (in thousands) Weighted Average Per Share Grant Date Fair Value Unvested, December 31, 2017 200 $ 2.88 Granted — $ — Vested — $ — Forfeited — $ — Unvested, March 31, 2018 200 $ 2.88

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Warranty Activity	Warranty activity consists of the following (in thousands): Three Months Ended March 31, 2018 2017 Beginning balance $ 2,083 $ 1,210 Additions 434 312 Charges (281 ) (191 ) Ending balance $ 2,236 $ 1,331

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting 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 March 31, (in thousands) 2018 2017 Revenues: (1) Builder operations Texas $ 71,548 $ 50,670 Georgia 52,718 42,727 Land development 3,999 5,940 Corporate and other (2) — — Total revenues $ 128,265 $ 99,337 Gross profit: (1) Builder operations Texas $ 17,017 $ 12,310 Georgia 11,864 9,348 Land development 1,285 1,828 Corporate and other (2) (3,036 ) (2,200 ) Total gross profit $ 27,130 $ 21,286 Income (loss) before taxes: Builder operations Texas $ 11,100 $ 8,375 Georgia 7,978 6,102 Land development 1,019 1,505 Corporate and other (2)(3) (3,486 ) (3,867 ) Total income (loss) before taxes $ 16,611 $ 12,115 March 31, 2018 December 31, 2017 Inventory: Builder operations Texas $ 113,320 $ 110,872 Georgia 101,996 99,613 Land development 299,761 272,542 Corporate and other (2)(4) 13,422 12,628 Total inventory $ 528,499 $ 495,655 (1) Builder operations segment revenue does not equal revenue from the sale of residential units included in the consolidated statements of income in periods when our controlled builders have sales of land or lots, which for the three months ended March 31, 2018 and 2017 were $3.9 million and $0.0 million , respectively. Revenue from such sales is included in builder operations segment revenue as it relates to builder operations, and included in revenue from sale of land and lots in the condensed consolidated statements of income. (2) Corporate and other is comprised principally of general corporate expenses associated with administrative functions such as finance, treasury, information technology and human resources. (3) Corporate and other income (loss) before taxes includes results from Green Brick Title and Challenger Subsidiary. (4) Corporate and other inventory consists of capitalized overhead and interest related to work in process and land under development.

Basis of Presentation and Sig28

Basis of Presentation and Significant Accounting Policies (Details)	3 Months Ended
	Mar. 31, 2018USD ($)segmentboard_seatindividual	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Class of Stock [Line Items]
Ownership percentage by parent	50.00%
Percentage of voting interest	51.00%
Board seats held | board_seat	2
Board seats available | board_seat	3
Number of individuals required to give approval of an action to the board of managers | individual	1
Ownership percentage by noncontrolling owners	50.00%
Assets of VIEs that can be used only to settle obligations of the VIEs	$ 49,000,000		$ 52,200,000
Number of reportable segments | segment	2
Number of operating segments | segment	2
Cumulative effect on opening balance of retained earnings	$ 137,106,000		125,903,000	[1]
Property and equipment, net	2,108,000		804,000	[1]
Inventory	528,499,000		495,655,000	[1]
Depreciation expense	402,000	$ 88,000
Selling, General and Administrative Expense
Class of Stock [Line Items]
Depreciation expense	300,000
Calculated under Revenue Guidance in Effect before Topic 606 | Cost of Sales
Class of Stock [Line Items]
Depreciation expense		$ 200,000
Model Home Furnishings
Class of Stock [Line Items]
Property and equipment, net	1,300,000
Model Home Furnishings | Calculated under Revenue Guidance in Effect before Topic 606
Class of Stock [Line Items]
Inventory			1,100,000
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
Class of Stock [Line Items]
Cumulative effect on opening balance of retained earnings			0
Cash
Class of Stock [Line Items]
Assets of VIEs that can be used only to settle obligations of the VIEs	800,000		900,000
Inventories
Class of Stock [Line Items]
Assets of VIEs that can be used only to settle obligations of the VIEs	$ 44,000,000		$ 47,800,000
[1]	The Condensed Consolidated Balance Sheet at December 31, 2017 has been derived from the audited financial statements at that date, but does not include all of the footnotes required by U.S. generally accepted accounting principles for complete financial statements.

Net Income Attributable to Gr29

Net Income Attributable to Green Brick Partners, Inc. Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income attributable to Green Brick Partners, Inc. per share:
Net income attributable to Green Brick Partners, Inc.	$ 11,203	$ 6,197
Weighted-average number of shares outstanding —basic (in shares)	50,577,000	48,958,000
Basic net income attributable to Green Brick Partners, Inc. per share (in dollars per share)	$ 0.22	$ 0.13
Dilutive effect of stock options and restricted stock awards (in shares)	141,000	59,000
Weighted-average number of shares outstanding —diluted (in shares)	50,718,000	49,017,000
Diluted net income attributable to Green Brick Partners, Inc. per share (in dollars per share)	$ 0.22	$ 0.13
Potentially dilutive securities with antidilutive effect that could potentially dilute earnings per share in the future (in shares)	0	0

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Completed home inventory and residential lots held for sale	$ 117,889	$ 106,043
Work in process and land under development	410,610	389,612
Total inventory	$ 528,499	$ 495,655	[1]
[1]	The Condensed Consolidated Balance Sheet at December 31, 2017 has been derived from the audited financial statements at that date, but does not include all of the footnotes required by U.S. generally accepted accounting principles for complete financial statements.

Inventory (Capitalization of In

Inventory (Capitalization of Interest) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Interest capitalized at beginning of period	$ 10,474	$ 9,417
Interest incurred	1,628	893
Interest charged to cost of sales	(881)	(875)
Interest capitalized at end of period	$ 11,221	$ 9,435

Revenue Recognition (Narrative)

Revenue Recognition (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018USD ($)source	Mar. 31, 2017USD ($)
Disaggregation of Revenue [Line Items]
Number of primary revenue sources | source	2
Revenue recognized from performance obligations satisfied in prior periods	$ 0	$ 0
Homebuyers
Disaggregation of Revenue [Line Items]
Duration of contract with customer (less than)	1 year
Residential units | Homebuyers
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 3,200,000	2,300,000
Land and lots | Homebuilders
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 200,000	$ 300,000

Revenue Recognition (Disaggrega

Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Builder operations	$ 120,366	$ 93,397
Land development	7,899	5,940
Transferred at a point in time
Disaggregation of Revenue [Line Items]
Builder operations	120,366	93,397
Land development	7,899	5,940
Residential units
Disaggregation of Revenue [Line Items]
Builder operations	120,366	93,397
Land development	0	0
Land and lots
Disaggregation of Revenue [Line Items]
Builder operations	0	0
Land development	7,899	5,940
Homebuyers
Disaggregation of Revenue [Line Items]
Builder operations	120,366	93,397
Land development	0	0
Homebuilders
Disaggregation of Revenue [Line Items]
Builder operations	0	0
Land development	7,899	5,940
Builder operations | Texas
Disaggregation of Revenue [Line Items]
Builder operations	71,548	50,670
Land development	0	0
Builder operations | Georgia
Disaggregation of Revenue [Line Items]
Builder operations	48,818	42,727
Land development	0	0
Land development | Texas
Disaggregation of Revenue [Line Items]
Builder operations	0	0
Land development	3,999	5,753
Land development | Georgia
Disaggregation of Revenue [Line Items]
Builder operations	0	0
Land development	$ 3,900	$ 187

Revenue Recognition (Contract B

Revenue Recognition (Contract Balances Included in Balance Sheet) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017		Mar. 31, 2017	Dec. 31, 2016
Revenue from Contract with Customer [Abstract]
Customer and builder deposits	$ 22,698	$ 21,447	[1]	$ 17,067	$ 14,088
[1]	The Condensed Consolidated Balance Sheet at December 31, 2017 has been derived from the audited financial statements at that date, but does not include all of the footnotes required by U.S. generally accepted accounting principles for complete financial statements.

Revenue Recognition (Transactio

Revenue Recognition (Transaction Price Allocated to Remaining Performance Obligations) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 35,773
Expected timing of satisfaction	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 47,500
Expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 19,567
Expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 4,536
Expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 107,376
Expected timing of satisfaction

Business Combination (Details)

Business Combination (Details) - USD ($)	Apr. 26, 2018	Mar. 31, 2018
Business Acquisition [Line Items]
Ownership percentage by noncontrolling owners		50.00%
GRBK GHO
Business Acquisition [Line Items]
Integration costs incurred		$ 32,300
GRBK GHO | Subsequent Event
Business Acquisition [Line Items]
Percent of equity interests acquired	80.00%
Consideration transferred	$ 33,200,000
Potential obligation to pay additional consideration if certain performance targets are met, period following acquisition date	3 years
GRBK GHO | Subsequent Event | GHO Homes
Business Acquisition [Line Items]
Ownership percentage by noncontrolling owners	20.00%
Amount contributed	$ 8,300,000

Debt (Schedule of Lines of Cred

Debt (Schedule of Lines of Credit Outstanding) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 15, 2015
Line of Credit Facility [Line Items]
Total lines of credit	$ 135,000	$ 107,000
Johns Creek Carrollton Allen | Inwood National Bank
Line of Credit Facility [Line Items]
Total lines of credit	45,000	32,000
Unsecured Debt | Unsecured revolving credit facility | Citibank, N.A. and Credit Suisse AG, Cayman Islands Branch
Line of Credit Facility [Line Items]
Total lines of credit	$ 90,000	$ 75,000	$ 40,000

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($)

Sep. 01, 2017

Mar. 06, 2017

May 03, 2016

Dec. 15, 2015

Mar. 31, 2018

Mar. 27, 2018

Mar. 12, 2018

Dec. 31, 2017

Dec. 15, 2017

Oct. 27, 2017

Dec. 15, 2016

Nov. 30, 2016

Aug. 31, 2016

Jul. 30, 2015

Dec. 13, 2013

Debt Instrument [Line Items]

Borrowings on lines of credit

$ 135,000,000

$ 107,000,000

Notes payable

9,914,000

9,926,000

[1]

Briar Ridge Investments, LTD | Notes Payable

Debt Instrument [Line Items]

Notes payable

9,000,000

9,000,000

Briar Ridge Investments, LTD | Subsidiary of JBGL | Notes Payable

Debt Instrument [Line Items]

Stated interest rate

6.00%

Face amount

$ 9,000,000

Accrued interest

100,000

Graham Mortgage Corporation | Notes Payable

Debt Instrument [Line Items]

Notes payable

914,000

926,000

Graham Mortgage Corporation | Subsidiary of JBGL | Notes Payable

Debt Instrument [Line Items]

Stated interest rate

3.00%

Accrued interest

$ 42,800

Notes payable

$ 1,200,000

Inwood National Bank | Johns Creek Carrollton Allen

Debt Instrument [Line Items]

Maximum borrowing capacity

$ 50,000,000

Interest rate at period end

4.75%

Borrowing base limitation, total value of land

50.00%

Borrowing base limitation, total value of lots owned by certain of the Company's subsidiaries

65.00%

Maximum value of land used when calculating borrowing base

65.00%

Commitment fee percentage on amount of unused commitments

0.25%

Borrowings on lines of credit

$ 45,000,000

32,000,000

Inwood National Bank | Johns Creek Carrollton Allen | Minimum

Debt Instrument [Line Items]

Stated interest rate

4.00%

Inwood National Bank | Johns Creek Carrollton Allen | Maximum

Debt Instrument [Line Items]

Stated interest rate

18.00%

Inwood National Bank | Johns Creek Carrollton Allen | Subsidiary of JBGL

Debt Instrument [Line Items]

Maximum borrowing capacity

$ 75,000,000

$ 50,000,000

Maximum loan-to-value ration during temporary borrowing base waiver

70.00%

Inwood National Bank | Johns Creek Carrollton Allen | Other Assets

Debt Instrument [Line Items]

Costs associated with amendment

$ 100,000

Citibank, N.A. and Credit Suisse AG, Cayman Islands Branch | Unsecured revolving credit facility | Unsecured Debt

Debt Instrument [Line Items]

Maximum borrowing capacity

$ 75,000,000

Interest rate at period end

4.32%

Commitment fee percentage on amount of unused commitments

0.45%

Borrowings on lines of credit

$ 40,000,000

$ 90,000,000

$ 75,000,000

Unrestricted cash on borrowing base limitation

100.00%

Borrowing base limitation for unrestricted cash

$ 15,000,000

Percentage book value of model homes, construction in progress homes, sold completed homes and speculative homes

85.00%

Percentage book value of finished lots and land under development

65.00%

Percentage book value of entitled land

50.00%

Citibank, N.A. and Credit Suisse AG, Cayman Islands Branch | Unsecured Revolving Credit Facility, Base Rate Advances | Unsecured Debt | Federal Funds Effective Swap Rate

Debt Instrument [Line Items]

Basis spread on variable rate

0.50%

Citibank, N.A. and Credit Suisse AG, Cayman Islands Branch | Unsecured Revolving Credit Facility, Base Rate Advances | Unsecured Debt | Base Rate

Debt Instrument [Line Items]

Basis spread on variable rate

1.50%

Citibank, N.A. and Credit Suisse AG, Cayman Islands Branch | Unsecured Revolving Credit Facility, Base Rate Advances | Unsecured Debt | London Interbank Offered Rate (LIBOR)

Debt Instrument [Line Items]

Basis spread on variable rate

1.00%

Citibank, N.A. and Credit Suisse AG, Cayman Islands Branch | Unsecured Revolving Credit Facility, Eurodollar Rate Advances | Unsecured Debt | London Interbank Offered Rate (LIBOR)

Debt Instrument [Line Items]

Basis spread on variable rate

2.50%

Citibank, N.A. | Unsecured revolving credit facility | Unsecured Debt

Debt Instrument [Line Items]

Borrowings on lines of credit

$ 25,000,000

$ 35,000,000

Credit Suisse AG, Cayman Islands Branch | Unsecured revolving credit facility | Unsecured Debt

Debt Instrument [Line Items]

Borrowings on lines of credit

$ 25,000,000

$ 15,000,000

Flagstar Bank | Unsecured revolving credit facility | Unsecured Debt

Debt Instrument [Line Items]

Borrowings on lines of credit

70,000,000

$ 35,000,000

$ 20,000,000

Flagstar Bank | Unsecured revolving credit facility | Other Assets | Unsecured Debt

Debt Instrument [Line Items]

Costs associated with amendment

100,000

Citibank, N.A., Credit Suisse AG, Cayman Islands Branch, and Flagstar Bank | Unsecured revolving credit facility | Unsecured Debt

Debt Instrument [Line Items]

Maximum borrowing capacity

200,000,000

110,000,000

Borrowings on lines of credit

130,000,000

$ 85,000,000

$ 70,000,000

$ 60,000,000

Upfront fee, percent of aggregate amount of extended commitments

0.15%

0.15%

Citibank, N.A., Credit Suisse AG, Cayman Islands Branch, and Flagstar Bank | Unsecured revolving credit facility | Other Assets | Unsecured Debt

Debt Instrument [Line Items]

Costs associated with amendment

$ 400,000

JPMorgan Chase Bank , N.A. | Unsecured revolving credit facility | Unsecured Debt

Debt Instrument [Line Items]

Borrowings on lines of credit

$ 30,000,000

Citibank, N.A., Credit Suisse AG, Cayman Islands Branch, Flagstar Bank and JP Morgan Chase | Unsecured revolving credit facility | Unsecured Debt

Debt Instrument [Line Items]

Borrowings on lines of credit

$ 160,000,000

[1]

The Condensed Consolidated Balance Sheet at December 31, 2017 has been derived from the audited financial statements at that date, but does not include all of the footnotes required by U.S. generally accepted accounting principles for complete financial statements.

Debt (Schedule of Notes Payable

Debt (Schedule of Notes Payable Outstanding) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Notes payable	$ 9,914	$ 9,926	[1]
Notes Payable | Briar Ridge Investments, LTD
Debt Instrument [Line Items]
Notes payable	9,000	9,000
Notes Payable | Graham Mortgage Corporation
Debt Instrument [Line Items]
Notes payable	$ 914	$ 926
[1]	The Condensed Consolidated Balance Sheet at December 31, 2017 has been derived from the audited financial statements at that date, but does not include all of the footnotes required by U.S. generally accepted accounting principles for complete financial statements.

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		50,598,901
Beginning balance	[1]	$ 433,038
Share-based compensation		71
Issuance of common stock under 2014 Omnibus Equity Incentive Plan, net of shares withheld for employee taxes		669
Amortization of deferred share-based compensation		96
Common stock issued in connection with the investment in the Challenger Subsidiary		0
Distributions		(8,045)
Net income		$ 13,239	$ 8,226
Ending balance (in shares)		50,685,699
Ending balance		$ 439,068
Total Green Brick Partners, Inc. Stockholders’ Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		416,347
Share-based compensation		71
Issuance of common stock under 2014 Omnibus Equity Incentive Plan, net of shares withheld for employee taxes		669
Amortization of deferred share-based compensation		96
Net income		11,203
Ending balance		$ 428,386
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		50,598,901
Beginning balance		$ 506
Issuance of common stock under 2014 Omnibus Equity Incentive Plan, net of shares withheld for employee taxes (in shares)		66,798
Issuance of common stock under 2014 Omnibus Equity Incentive Plan, net of shares withheld for employee taxes		$ 1
Common stock issued in connection with the investment in the Challenger Subsidiary (in shares)		20,000
Ending balance (in shares)		50,685,699
Ending balance		$ 507
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		289,938
Share-based compensation		71
Issuance of common stock under 2014 Omnibus Equity Incentive Plan, net of shares withheld for employee taxes		668
Amortization of deferred share-based compensation		96
Ending balance		290,773
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		125,903
Net income		11,203
Ending balance		137,106
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		16,691
Distributions		(8,045)
Net income		2,036
Ending balance		$ 10,682
[1]	The Condensed Consolidated Balance Sheet at December 31, 2017 has been derived from the audited financial statements at that date, but does not include all of the footnotes required by U.S. generally accepted accounting principles for complete financial statements.

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - $ / shares	Mar. 27, 2014	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2016
Class of Stock [Line Items]
Common stock, shares authorized (in shares)		100,000,000	100,000,000
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01
Common stock, shares issued (in shares)		50,685,699	50,598,901
Common stock, shares outstanding (in shares)		50,685,699	50,598,901
Preferred stock, shares authorized (in shares)		5,000,000	5,000,000
Preferred stock, par value (in dollars per share)		$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)		0	0
Preferred stock, shares outstanding (in shares)		0	0
Number of shares authorized to be repurchased (in shares)				1,000,000
Number of shares repurchased (in shares)			0
Common Stock | Challenger Subsidiary
Class of Stock [Line Items]
Common stock issued in connection with the investment in the Challenger Subsidiary (in shares)		20,000
Preferred Share Purchase Right
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred share purchase right dividend (in shares)	1
Exercise price of rights (in dollars per share)	$ 30
Series B Junior Participating Preferred Stock
Class of Stock [Line Items]
Number of securities called by each right (in shares)	0.001
Preferred Stock
Class of Stock [Line Items]
Number of securities called by each right (in shares)	0.001

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	0	0
Share-based compensation expense	$ 1,248	$ 1,912
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 100
Period for recognition	1 month 23 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 500
Period for recognition	1 year 6 months 27 days
Named Executive Officers | Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of awards vested and forfeitable at time of grant	100.00%
Withholdings from vesting of restricted stock awards (in shares)	39,228
Withholdings from vesting of restricted stock awards	$ 400

Share-Based Compensation (Summa

Share-Based Compensation (Summary of Share-Based Awards Activity) (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Number of Shares
Nonvested, beginning of period (in shares) | shares	38
Granted (in shares) | shares	106
Vested (in shares) | shares	(106)
Forfeited (in shares) | shares	0
Nonvested, end of period (in shares) | shares	38
Weighted Average Grant Date Fair Value per Share
Nonvested, beginning of period (in dollars per share) | $ / shares	$ 10.25
Granted (in dollars per share) | $ / shares	9.95
Vested (in dollars per share) | $ / shares	9.95
Forfeited (in dollars per share) | $ / shares	0
Nonvested, end of period (in dollars per share) | $ / shares	$ 10.25

Share-Based Compensation (Sum44

Share-Based Compensation (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Number of Shares
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)	300,000
Weighted Average Exercise Price per Share
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 contractual term (in years)	6 years 6 months 27 days
Options exercisable, weighted average remaining contractual term (in years)	6 years 6 months 27 days
Options outstanding, aggregate intrinsic value	$ 1,705
Options exercisable, aggregate intrinsic value	$ 1,023

Share-Based Compensation (Sum45

Share-Based Compensation (Summary of Unvested Stock Options Activity) (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Number of Shares
Unvested, beginning balance (in shares) | shares	200
Granted (in shares) | shares	0
Vested (in shares) | shares	0
Forfeited (in shares) | shares	0
Unvested, ending balance (in shares) | shares	200
Weighted Average Per Share Grant Date Fair Value
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
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income tax provision	$ 3,372	$ 3,889
Effective tax rate	20.30%	32.10%

Related Party Transactions (Det

Related Party Transactions (Details)	1 Months Ended			3 Months Ended				12 Months Ended			25 Months Ended
	Feb. 28, 2017USD ($)	Sep. 30, 2016	Jun. 30, 2016USD ($)lottownhome	Mar. 31, 2018USD ($)board_seat	Dec. 31, 2017USD ($)lot		Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)lot		Dec. 31, 2015USD ($)	Mar. 31, 2018USD ($)board_seat	Mar. 31, 2016lottownhome	Sep. 30, 2015lottownhome
Related Party Transaction [Line Items]
Ownership percentage by parent				50.00%							50.00%
Ownership percentage by noncontrolling owners				50.00%							50.00%
Percentage of voting interest				51.00%							51.00%
Noncontrolling interests				$ 10,682,000	$ 16,691,000	[1]		$ 16,691,000	[1]		$ 10,682,000
Board seats held | board_seat				2							2
Board seats available | board_seat				3							3
Suwanee Station
Related Party Transaction [Line Items]
Board seats held | board_seat				2							2
Board seats available | board_seat				3							3
Centre Living
Related Party Transaction [Line Items]
Ownership percentage by parent				50.00%							50.00%
Ownership percentage by noncontrolling owners				50.00%							50.00%
Percentage of voting interest				51.00%							51.00%
Percent of centre living operations consolidated				100.00%
Noncontrolling interests				$ 115,740	56,445			56,445			$ 115,740
Centre Living | Richard A. Costello
Related Party Transaction [Line Items]
Proceeds from sale of developed lot					525,000
Related party deposit liabilities	$ 110,000
Centre Living | Jed Dolson
Related Party Transaction [Line Items]
Proceeds from sale of developed lot					475,000
Related party deposit liabilities	$ 110,000
Centre Living | Developed Lots
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
Investee | The Parc at Cogburn
Related Party Transaction [Line Items]
Number of real estate properties | lot													11
Number of units in real estate property | townhome													19
Payments to acquire real estate							$ 500,000			$ 1,800,000
Number of lots remaining to be purchased | lot					0			0
Investee | Academy Street
Related Party Transaction [Line Items]
Ownership percentage by parent												80.00%
Ownership percentage by noncontrolling owners												20.00%
Number of real estate properties | lot												83
Capital contributions made				0			$ 400,000				11,700,000
Payment for capital contributions, percent paid by the Company							80.00%
Distributions received							$ 4,000,000
Investee | Academy Street | Partnership Distributions
Related Party Transaction [Line Items]
Total distributions				0			5,000,000
Investee | Suwanee Station
Related Party Transaction [Line Items]
Number of real estate properties | townhome												73
Capital contributions made				0			0				$ 2,500,000
Distributions received				300,000			200,000
Investee | Suwanee Station | Parent Company
Related Party Transaction [Line Items]
Ownership percent												50.00%
Investee | Suwanee Station | Affiliated Entity
Related Party Transaction [Line Items]
Ownership percent												50.00%
Investee | Suwanee Station | Partnership Distributions
Related Party Transaction [Line Items]
Total distributions				$ 700,000			400,000
Investee | Dunwoody Towneship
Related Party Transaction [Line Items]
Number of real estate properties | lot			14		26			26
Number of units in real estate property | townhome			40
Payments to acquire real estate							$ 700,000	$ 3,300,000
Deposit paid for purchase of real estate			$ 0
Chief Financial Officer | Townhome
Related Party Transaction [Line Items]
Contract price employee discount premium	13.00%
Named Executive Officers | Townhome
Related Party Transaction [Line Items]
Contract price employee discount premium	13.00%
[1]	The Condensed Consolidated Balance Sheet at December 31, 2017 has been derived from the audited financial statements at that date, but does not include all of the footnotes required by U.S. generally accepted accounting principles for complete financial statements.

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
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) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Letters of credit outstanding	$ 200		$ 200
Accrued Expenses
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	2,083	$ 1,210
Additions	434	312
Charges	(281)	(191)
Ending balance	$ 2,236	$ 1,331
Home Warranty, Defects and Products Used
Product Warranty Liability [Line Items]
Term of warranty	1 year
Home Warranty, Electrical, Mechanical and Plumbing Systems
Product Warranty Liability [Line Items]
Term of warranty	2 years
Home Warranty, Qualified and Defined Structural Defects
Product Warranty Liability [Line Items]
Term of warranty	10 years
Developed Lots Warranty
Product Warranty Liability [Line Items]
Term of warranty	1 year

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Revenues:
Builder operations	$ 120,366	$ 93,397
Land development	7,899	5,940
Gross profit:
Total gross profit	27,130	21,286
Income (loss) before taxes:
Income before taxes	16,611	12,115
Operating Segments
Revenues:
Total revenues	128,265	99,337
Gross profit:
Total gross profit	27,130	21,286
Income (loss) before taxes:
Income before taxes	16,611	12,115
Inventory:
Total inventory	528,499		$ 495,655
Operating Segments | Builder operations
Revenues:
Land development	3,900	0
Operating Segments | Builder operations | Texas
Revenues:
Builder operations	71,548	50,670
Gross profit:
Builder operations	17,017	12,310
Income (loss) before taxes:
Builder operations	11,100	8,375
Inventory:
Total inventory	113,320		110,872
Operating Segments | Builder operations | Georgia
Revenues:
Builder operations	52,718	42,727
Gross profit:
Builder operations	11,864	9,348
Income (loss) before taxes:
Builder operations	7,978	6,102
Inventory:
Total inventory	101,996		99,613
Operating Segments | Land development
Revenues:
Land development	3,999	5,940
Gross profit:
Land development	1,285	1,828
Income (loss) before taxes:
Land development	1,019	1,505
Inventory:
Total inventory	299,761		272,542
Corporate and other
Revenues:
Total revenues	0	0
Gross profit:
Total gross profit	(3,036)	(2,200)
Income (loss) before taxes:
Income before taxes	(3,486)	$ (3,867)
Inventory:
Total inventory	$ 13,422		$ 12,628