Green Brick Partners (GRBK) 10-Q 8 Nov 19 2019 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Nov. 05, 2019
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	GRBK
Security Exchange Name	NASDAQ
Document Transition Report	false
Document Quarterly Report	true
Entity Incorporation, State or Country Code	DE
Entity Registrant Name	Green Brick Partners, Inc.
Entity Central Index Key	0001373670
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Tax Identification Number	20-5952523
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding		50,488,010
Entity Shell Company	false
Entity File Number	001-33530
Entity Address, Address Line One	2805 Dallas Pkwy
Entity Address, Address Line Two	Ste 400
Entity Address, City or Town	Plano
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75093
City Area Code	(469)
Local Phone Number	573-6755

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
ASSETS
Cash	$ 35,123	$ 38,315
Restricted cash	6,109	3,440
Receivables	9,510	4,842
Inventory	740,799	668,961
Investment in unconsolidated entities	24,444	20,269
Operating Lease, Right-of-Use Asset	3,731	0
Property and equipment, net	4,192	4,690
Earnest money deposits	15,933	16,793
Deferred income tax assets, net	15,793	16,499
Intangible assets, net	728	856
Goodwill	680	680
Other assets	8,747	8,681
Total assets	865,789	784,026
LIABILITIES AND EQUITY
Accounts payable	34,690	26,091
Accrued expenses	31,178	29,201
Customer and builder deposits	27,122	31,978
Operating Lease, Liability	3,837	0
Borrowings on lines of credit, net	164,792	200,386
Senior Notes	73,358	0
Contingent consideration	2,110	2,207
Total liabilities	337,087	289,863
Commitments and contingencies
Redeemable noncontrolling interest in equity of consolidated subsidiary	12,209	8,531
Green Brick Partners, Inc. stockholders’ equity
Preferred stock, $0.01 par value: 5,000,000 shares authorized; none issued and outstanding	0	0
Common stock, $0.01 par value: 100,000,000 shares authorized; 50,879,949 and 50,719,884 issued and 50,488,010 and 50,583,128 outstanding as of September 30, 2019 and December 31, 2018, respectively	509	507
Treasury Stock, Common, Value	(3,167)	(981)
Additional paid-in capital	291,111	291,299
Retained earnings	220,262	177,526
Total Green Brick Partners, Inc. stockholders’ equity	508,715	468,351
Noncontrolling interests	7,778	17,281
Total equity	516,493	485,632
Total liabilities and equity	$ 865,789	$ 784,026

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 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	50,879,949	50,879,949	50,719,884	50,719,884	50,719,884	50,598,901
Common stock, shares outstanding (in shares)	50,488,010		50,583,128

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Total revenues	$ 209,404	$ 152,052	$ 561,538	$ 438,527
Cost of Goods and Services Sold	164,679	115,384	441,166	328,154
Total gross profit	44,725	36,668	120,372	110,373
Selling, general and administrative expense	25,078	19,643	71,104	57,790
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	1,492	0	1,749	0
Equity in income of unconsolidated entities	3,022	2,719	7,565	6,534
Other income, net	3,795	363	6,663	1,831
Income before income taxes	24,972	20,107	61,747	60,948
Income tax expense	5,833	4,734	14,993	13,341
Net income	19,139	15,373	46,754	47,607
Less: Net income attributable to noncontrolling interests	3,468	3,176	4,018	9,338
Net income attributable to Green Brick Partners, Inc.	$ 15,671	$ 12,197	$ 42,736	$ 38,269
Net income attributable to Green Brick Partners, Inc. per common share:
Basic (in dollars per share)	$ 0.31	$ 0.24	$ 0.85	$ 0.76
Diluted (in dollars per share)	$ 0.31	$ 0.24	$ 0.84	$ 0.75
Weighted average common shares used in the calculation of net income attributable to Green Brick Partners, Inc. per common share:
Basic (in shares)	50,475	50,686	50,564	50,642
Diluted (in shares)	50,597	50,778	50,642	50,760
Residential Real Estate [Member]
Total revenues	$ 199,918	$ 139,459	$ 536,560	$ 406,903
Cost of Goods and Services Sold	157,243	104,831	421,663	302,899
Real Estate, Other [Member]
Total revenues	9,486	12,593	24,978	31,624
Cost of Goods and Services Sold	$ 7,436	$ 10,553	$ 19,503	$ 25,255

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 46,754	$ 47,607
Depreciation, Depletion and Amortization	2,443	1,804
Adjustments to reconcile net income to net cash used in operating activities:
Share-based compensation expense	2,035	1,597
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	1,749	0
Deferred income taxes, net	706	11,120
Income (Loss) from Equity Method Investments	(7,565)	(6,534)
Distributions of income from unconsolidated entities	3,390	3,361
Changes in operating assets and liabilities:
Increase in receivables	(4,668)	(2,245)
Increase in inventory	(71,392)	(108,634)
Decrease in earnest money deposits	860	1,021
Increase in other assets	(103)	(3,053)
Increase in accounts payable	(8,599)	(8,424)
Increase in accrued expenses	2,141	3,914
Payment for Contingent Consideration Liability, Operating Activities	(1,332)	0
(Decrease) increase in customer and builder deposits	(4,856)	3,293
Net cash used in operating activities	(21,239)	(38,325)
Cash flows from investing activities:
Payments to Acquire Businesses, Net of Cash Acquired		(26,861)
Stock Issued During Period, Value, Acquisitions	0
Payments to Acquire Equity Method Investments		(755)
Purchase of property and equipment	(1,838)	(1,767)
Net cash used in investing activities	(1,838)	(29,383)
Cash flows from financing activities:
Borrowings from lines of credit	165,500	133,000
Proceeds from Issuance of Senior Long-term Debt	75,000	0
Payments of debt issuance costs	(1,682)	(228)
Repayments of lines of credit	(201,500)	(40,000)
Repayments of notes payable	0	(9,181)
Payment for Contingent Consideration Liability, Financing Activities	(514)	0
Payments of withholding tax on vesting of restricted stock awards	(544)	(412)
Payments for Repurchase of Common Stock	(2,186)	0
Payments to Noncontrolling Interests	(10,993)	(10,746)
Proceeds from (Payments for) Other Financing Activities	(527)	0
Net cash provided by financing activities	22,554	72,433
Net (decrease) increase in cash and restricted cash	(523)	4,725
Cash, beginning of period	38,315	36,684
Restricted cash, beginning of period	3,440	3,605
Cash and restricted cash, beginning of period	41,755	40,289
Cash, end of period	35,123	33,116
Restricted cash, end of period	6,109	11,898
Cash and restricted cash, end of period	41,232	45,014
Supplemental disclosure of cash flow information:
Cash paid for interest, net of capitalized interest	0	0
Cash paid for income taxes, net of refunds	$ 14,313	$ 3,400

Significant Accounting Policies

Significant Accounting Policies Accounting Policies (Notes)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES 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. The condensed consolidated balance sheet as of December 31, 2018 was derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 . In the opinion of management, the accompanying unaudited 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, 2018 . Operating results for the three and nine months ended September 30, 2019 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2019 or subsequent periods. Principles of Consolidation The accompanying unaudited condensed consolidated financial statements include the accounts of Green Brick Partners, Inc., its controlled subsidiaries, and variable interest entities (“VIEs”) in which Green Brick Partners, Inc. or one of its controlled subsidiaries is deemed to be the primary beneficiary (together, the “Company”, “we”, or “Green Brick”). All intercompany balances and transactions have been eliminated in consolidation. The Company uses the equity method of accounting for its investments in unconsolidated entities over which it exercises significant influence but does not have a controlling interest. Under the equity method, the Company’s share of the unconsolidated entities’ earnings or losses, if any, is included in the condensed consolidated statements of income. Use of Estimates The preparation of the condensed consolidated financial statements in conformity with GAAP requires management of 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. Reclassifications Certain prior period amounts have been reclassified to conform to the current period presentation. Beginning in the first quarter of 2019, the Company reclassified its sales commission expenses from cost of residential units to selling, general and administrative expense in the condensed consolidated statements of income in order to be more comparable with a majority of its peers. There was no impact to net income from the reclassification in any period. For a complete set of the Company’s significant accounting policies, refer to Note 1 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 . Changes and additions to significant accounting policies during the nine months ended September 30, 2019 are presented below. Impairment of Inventory In accordance with ASC 360, Property, Plant, and Equipment (“ASC 360”), we evaluate our inventory for indicators of impairment by individual community and development during each reporting period. For our builder operations segments, during each reporting period, community gross margins, levels of completed spec units, quantities of lots not started, and community outlook factors are reviewed by management. In the event that this review indicates higher potential for losses at a specific community, the Company monitors such communities by adding them to its “watchlist” communities, and, when an impairment trigger is present, further analysis is performed. For our land development segment, we perform a quarterly review for indicators of impairment for each project which involves projecting future lot closings based on executed contracts and comparing these anticipated revenues to projected costs. In determining the allocation of costs to a particular land parcel, we rely on project budgets which are based on a variety of assumptions, including assumptions about development schedules and future costs to be incurred. It is common that actual results differ from budgeted amounts for various reasons, including delays, changes in costs that have not been committed, unforeseen issues encountered during project development that fall outside the scope of existing contracts, or items that ultimately cost more or less than the budgeted amount. We apply procedures to maintain best estimates in our budgets, including assessing and revising project budgets on a periodic basis, obtaining commitments from subcontractors and vendors for future costs to be incurred and utilizing the most recent information available to estimate costs. Each reporting period, management reviews each real estate asset which has an indicator of impairment in order to determine whether the estimated remaining undiscounted future cash flows are more or less than the asset’s carrying value. The estimated cash flows are determined by projecting the remaining revenue from closings based on the contractual lot takedowns remaining or historical and projected home sales or delivery absorptions for homebuilding operations and then comparing such projections to the remaining projected expenditures for development or home construction. Remaining projected expenditures are based on the most current pricing/bids received from subcontractors for current phases or homes under development. For future phases of land development, management uses its judgment to project potential cost increases. In determining the estimated cash flows for land held for sale, management considers recent comparisons to market comparable transactions, bona fide letters of intent from outside parties, executed sales contracts, broker quotes, and similar information. When projecting revenue, management does not assume improvement in market conditions. If the estimated undiscounted cash flows are more than the asset’s carrying value, no impairment adjustment is required. However, if the estimated undiscounted cash flows are less than the asset’s carrying value, the asset is deemed impaired and will be written down to fair value less associated costs to sell. These impairment evaluations require us to make estimates and assumptions regarding future conditions, including the timing and amounts of development costs and sales prices of real estate assets, to determine if expected future cash flows will be sufficient to recover the asset’s carrying value. Fair value is determined based on estimated future cash flows discounted for inherent risks associated with real estate assets. These discounted cash flows are impacted by expected risk based on estimated land development activities, construction and delivery timelines, market risk of price erosion, uncertainty of development or construction cost increases, and other risks specific to the asset or market conditions where the asset is located when the assessment is made. These factors are specific to each community and may vary among communities. When estimating cash flows of a community, management makes various assumptions, including: (i) expected sales prices and sales incentives to be offered, including the number of homes available, pricing and incentives being offered by us or other builders, and future sales price adjustments based on market and economic trends; (ii) expected sales pace and cancellation rates based on local housing market conditions, competition and historical trends; (iii) costs expended to date and expected to be incurred including, but not limited to, land and land development costs, home construction costs, interest costs, indirect construction and overhead costs, and selling and marketing costs; (iv) alternative product offerings that may be offered that could have an impact on sales pace, sales price and/or building costs; and (v) alternative uses for the property. Many assumptions are interdependent and a change in one may require a corresponding change to other assumptions. For example, increasing or decreasing sales absorption rates has a direct impact on the estimated per unit sales price of a home, the level of time-sensitive costs (such as indirect construction, overhead and carrying costs), and selling and marketing costs (such as model home maintenance costs and advertising costs). Due to uncertainties in the estimation process, the volatility in demand for new housing and the long life cycle of many communities, actual results could differ significantly from such estimates. Revenue Recognition 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 to third parties are also expensed as incurred upon closing. Sales commissions on the sale of homes and land parcels are included in selling, general and administrative expense in the consolidated statements of income. Fair Value Measurements Transfers between levels of the fair value hierarchy are deemed to have occurred on the date of the event or change in circumstances that caused the transfer. Recent Accounting Pronouncements In February 2016, the FASB issued Accounting Standard Update (“ASU”) 2016-02, Leases (Topic 842) (“Topic 842”), which requires lessees to recognize leases on the balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU 2018-01, Land Easement Practical Expedient for Transition to Topic 842 ; ASU 2018-10, Codification Improvements to Topic 842, Leases ; ASU 2018-11, Targeted Improvements; and ASU 2019-01, Codification Improvements . The new standard establishes a right-of-use model (“ROU”) that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases are classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the statement of income. The new standard was effective for the Company on January 1, 2019 . A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. An entity may choose to use either (1) its effective date or (2) the beginning of the earliest comparative period presented in the financial statements as its date of initial application. We adopted the new standard on January 1, 2019 and used the effective date as our date of initial application. Consequently, prior period financial information has not been recast and the disclosures required under the new standard have not been provided for dates and periods before January 1, 2019 . The new standard provides a number of optional practical expedients in transition. We elected the “package of practical expedients”, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. We did not elect the use-of-hindsight or the practical expedient pertaining to land easements, the latter not being applicable to us. The new standard also provides practical expedients for an entity’s ongoing accounting. We elected the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, we have not recognized ROU assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. We also elected the practical expedient to not separate lease and non-lease components for all of our leases. We believe the most significant effects of the adoption of this standard relate to (1) the recognition of ROU assets and lease liabilities on our consolidated balance sheet for our office operating leases and (2) providing new disclosures about our leasing activities. There was no change in our leasing activities as a result of adoption. Upon adoption, as of January 1, 2019, we recognized operating lease liabilities of $4.2 million based on the present value of the remaining minimum rental payments under current leasing standards for existing operating leases, as well as corresponding ROU assets of $4.1 million . The $0.1 million difference between the ROU assets and lease liabilities is attributable to elimination of the accrued and prepaid rent existing as of January 1, 2019. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), which changes the impairment model for most financial assets and certain other instruments from an “incurred loss” approach to an “expected credit loss” methodology. The standard is expected to be effective for annual and interim periods beginning January 1, 2020, with early adoption permitted, and requires full retrospective application on adoption. The Company is currently evaluating the impact of the adoption of ASU 2016-13 on the Company’s consolidated financial statements but does not expect such impact to be material. In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”), which removes Step 2 of the goodwill impairment test. A goodwill impairment will now be determined by the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 is effective for annual reporting periods, and interim periods therein, beginning after December 15, 2019, with early adoption permitted. The Company does not expect the adoption of ASU 2017-04 to have a material impact on the Company’s consolidated financial statements.
Principles of Consolidation	Principles of Consolidation The accompanying unaudited condensed consolidated financial statements include the accounts of Green Brick Partners, Inc., its controlled subsidiaries, and variable interest entities (“VIEs”) in which Green Brick Partners, Inc. or one of its controlled subsidiaries is deemed to be the primary beneficiary (together, the “Company”, “we”, or “Green Brick”). All intercompany balances and transactions have been eliminated in consolidation.
Equity Method Investments [Policy Text Block]	The Company uses the equity method of accounting for its investments in unconsolidated entities over which it exercises significant influence but does not have a controlling interest. Under the equity method, the Company’s share of the unconsolidated entities’ 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 management of 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.
Reclassifications	Reclassifications Certain prior period amounts have been reclassified to conform to the current period presentation. Beginning in the first quarter of 2019, the Company reclassified its sales commission expenses from cost of residential units to selling, general and administrative expense in the condensed consolidated statements of income in order to be more comparable with a majority of its peers. There was no impact to net income from the reclassification in any period. For a complete set of the Company’s significant accounting policies, refer to Note 1 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 . Changes and additions to significant accounting policies during the nine months ended September 30, 2019 are presented below.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In February 2016, the FASB issued Accounting Standard Update (“ASU”) 2016-02, Leases (Topic 842) (“Topic 842”), which requires lessees to recognize leases on the balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU 2018-01, Land Easement Practical Expedient for Transition to Topic 842 ; ASU 2018-10, Codification Improvements to Topic 842, Leases ; ASU 2018-11, Targeted Improvements; and ASU 2019-01, Codification Improvements . The new standard establishes a right-of-use model (“ROU”) that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases are classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the statement of income. The new standard was effective for the Company on January 1, 2019 . A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. An entity may choose to use either (1) its effective date or (2) the beginning of the earliest comparative period presented in the financial statements as its date of initial application. We adopted the new standard on January 1, 2019 and used the effective date as our date of initial application. Consequently, prior period financial information has not been recast and the disclosures required under the new standard have not been provided for dates and periods before January 1, 2019 . The new standard provides a number of optional practical expedients in transition. We elected the “package of practical expedients”, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. We did not elect the use-of-hindsight or the practical expedient pertaining to land easements, the latter not being applicable to us. The new standard also provides practical expedients for an entity’s ongoing accounting. We elected the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, we have not recognized ROU assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. We also elected the practical expedient to not separate lease and non-lease components for all of our leases. We believe the most significant effects of the adoption of this standard relate to (1) the recognition of ROU assets and lease liabilities on our consolidated balance sheet for our office operating leases and (2) providing new disclosures about our leasing activities. There was no change in our leasing activities as a result of adoption. Upon adoption, as of January 1, 2019, we recognized operating lease liabilities of $4.2 million based on the present value of the remaining minimum rental payments under current leasing standards for existing operating leases, as well as corresponding ROU assets of $4.1 million . The $0.1 million difference between the ROU assets and lease liabilities is attributable to elimination of the accrued and prepaid rent existing as of January 1, 2019. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), which changes the impairment model for most financial assets and certain other instruments from an “incurred loss” approach to an “expected credit loss” methodology. The standard is expected to be effective for annual and interim periods beginning January 1, 2020, with early adoption permitted, and requires full retrospective application on adoption. The Company is currently evaluating the impact of the adoption of ASU 2016-13 on the Company’s consolidated financial statements but does not expect such impact to be material. In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”), which removes Step 2 of the goodwill impairment test. A goodwill impairment will now be determined by the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 is effective for annual reporting periods, and interim periods therein, beginning after December 15, 2019, with early adoption permitted. The Company does not expect the adoption of ASU 2017-04 to have a material impact on the Company’s consolidated financial statements.

Business Combination

Business Combination	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Business Combination	BUSINESS COMBINATION On April 26, 2018 (the “Acquisition Date”), following a series of transactions, the Company acquired substantially all of the assets and assumed certain liabilities of GHO Homes Corporation and its affiliates (“GHO”) through a newly formed subsidiary, GRBK GHO Homes, LLC (“GRBK GHO”), in which the Company holds an 80% controlling interest. GRBK GHO operates primarily in the Vero Beach, Florida market and is engaged in land and lot development, as well as all aspects of the homebuilding process. The acquisition allowed the Company to expand its operations into a new geographic market. The Company consolidates the financial statements of GRBK GHO as the Company owns 80% of the outstanding voting shares of the builder. The noncontrolling interest attributable to the 20% minority interest owned by our Florida-based partner is included as redeemable noncontrolling interest in equity of consolidated subsidiary in the Company’s condensed consolidated financial statements. The following table shows the changes in redeemable noncontrolling interest in equity of consolidated subsidiary during the three and nine months ended September 30, 2019 (in thousands): Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Redeemable noncontrolling interest, beginning of period $ 12,509 $ 8,531 Net income attributable to redeemable noncontrolling interest partner 863 2,528 Distributions of income to redeemable noncontrolling interest partner — (527 ) Accretion of redeemable noncontrolling interest (1,163 ) 1,677 Redeemable noncontrolling interest, end of period $ 12,209 $ 12,209 Under the terms of the purchase agreement, the Company may be obligated to pay contingent consideration to our partner if certain annual performance targets are met over the three-year period following the Acquisition Date. The performance targets specified in the purchase agreement were met for the period from April 26, 2018 through December 31, 2018 , and contingent consideration of $1.8 million was earned by the minority partner in 2018 and paid by the Company in April 2019 in addition to a $0.5 million distribution of income. Estimates of the undiscounted contingent consideration payouts for the period from January 1, 2019 through April 26, 2021 range from $3.0 million to $3.9 million . The change in the range of estimates of the undiscounted contingent consideration compared to December 31, 2018 was due to revision of the Company’s forecasts of GRBK GHO profits and capital requirements, as well as reduced volatility of earnings.

Net Income Attributable to Gree

Net Income Attributable to Green Brick Partners, Inc. Per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Net Income Attributable to Green Brick Partners, Inc. Per Share	PER SHARE The Company’s RSAs 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 nonvested shares of RSAs 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 RSAs. The computation of basic and diluted net income attributable to Green Brick Partners, Inc. per share is as follows (in thousands, except per share amounts): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Net income attributable to Green Brick Partners, Inc. $ 15,671 $ 12,197 $ 42,736 $ 38,269 Weighted-average number of shares outstanding - basic 50,475 50,686 50,564 50,642 Basic net income attributable to Green Brick Partners, Inc. per share $ 0.31 $ 0.24 $ 0.85 $ 0.76 Weighted-average number of shares outstanding - basic 50,475 50,686 50,564 50,642 Dilutive effect of stock options and restricted stock awards 122 92 78 118 Weighted-average number of shares outstanding - diluted 50,597 50,778 50,642 50,760 Diluted net income attributable to Green Brick Partners, Inc. per share $ 0.31 $ 0.24 $ 0.84 $ 0.75 The following shares which could potentially dilute earnings per share in the future are not included in the determination of diluted net income attributable to Green Brick Partners, Inc. per common share (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Antidilutive options to purchase common stock and restricted stock awards — 3 19 7

Inventory

Inventory	9 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
Inventory	INVENTORY A summary of inventory is as follows (in thousands): September 30, 2019 December 31, 2018 Homes completed or under construction $ 321,058 $ 268,763 Land and lots - developed and under development 418,700 399,809 Land held for sale 1,041 389 Total inventory $ 740,799 $ 668,961 A summary of interest costs incurred, capitalized and expensed is as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Interest capitalized at beginning of period $ 17,199 $ 12,143 $ 14,780 $ 10,474 Interest incurred 3,052 2,479 9,066 6,113 Interest charged to cost of revenues (2,324 ) (1,114 ) (5,919 ) (3,079 ) Interest capitalized at end of period $ 17,927 $ 13,508 $ 17,927 $ 13,508 As of September 30, 2019 , the Company reviewed the performance and outlook for all of its communities for indicators of potential impairment and performed detailed impairment analysis when necessary. As of September 30, 2019 , the Company performed further impairment analysis of the “watchlist” selling communities with a combined corresponding carrying value of approximately $10.7 million . There were no impairment adjustments related to inventory recorded during the three months ended September 30, 2019 . An impairment adjustment of $0.1 million to reduce the carrying value of impaired communities to fair value was recorded for the nine months ended September 30, 2019 . There were no impairment adjustments related to inventory recorded during the three months ended September 30, 2018 . The Company recorded an impairment adjustment of $0.1 million related to inventory for the nine months ended September 30, 2018 .

Investment in Unconsolidated En

Investment in Unconsolidated Entities	9 Months Ended
	Sep. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Investment in Unconsolidated Entities	INVESTMENT IN UNCONSOLIDATED ENTITIES A summary of the unaudited condensed financial information of the unconsolidated entities that are accounted for by the equity method is as follows (in thousands): September 30, 2019 December 31, 2018 Assets: Cash $ 11,642 $ 14,584 Accounts receivable 2,696 1,259 Bonds and notes receivable 5,864 5,864 Loans held for sale, at fair value 14,944 3,083 Inventory 54,032 44,375 Other assets 4,255 3,132 Total assets $ 93,433 $ 72,297 Liabilities: Accounts payable $ 5,835 $ 2,173 Accrued expenses and other liabilities 7,758 5,328 Notes payable 39,782 31,402 Total liabilities $ 53,375 $ 38,903 Owners’ equity: Green Brick $ 19,971 $ 15,653 Others 20,087 17,741 Total owners’ equity $ 40,058 $ 33,394 Total liabilities and owners’ equity $ 93,433 $ 72,297 Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Revenues $ 42,428 $ 43,758 $ 116,786 $ 120,710 Costs and expenses 36,227 38,308 101,348 107,328 Net earnings of unconsolidated entities $ 6,201 $ 5,450 $ 15,438 $ 13,382 Company’s share in net earnings of unconsolidated entities $ 3,022 $ 2,719 $ 7,565 $ 6,534

Debt

Debt	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Debt	DEBT Lines of Credit Borrowings on lines of credit outstanding, net of debt issuance costs, as of September 30, 2019 and December 31, 2018 consisted of the following (in thousands): September 30, 2019 December 31, 2018 Revolving credit facility $ 31,500 $ 46,500 Unsecured revolving credit facility 134,500 155,500 Debt issuance costs, net of amortization (1,208 ) (1,614 ) Total borrowings on lines of credit, net $ 164,792 $ 200,386 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 that is owned by certain of the Company’s subsidiaries. The entire unpaid principal balance and any accrued but unpaid interest is due and payable on the maturity date. Following several amendments, as of September 30, 2019 , the aggregate commitment amount was $75.0 million and the maturity date of the Credit Facility was May 1, 2022. On July 23, 2019, an irrevocable letter of credit of $1.3 million was issued by Inwood National Bank, which reduced the aggregate maximum commitment amount of the Credit Facility. As of September 30, 2019 , letters of credit outstanding totaling $3.2 million reduced the aggregate maximum commitment amount to $71.8 million . Effective September 19, 2019, the interest rate on outstanding borrowings under the Credit Facility changed to 4.75% per annum, due to the change in the Prime Rate of the Bank of America, N.A. As of September 30, 2019 , the interest rate on outstanding borrowings under the Credit Facility was 4.75% per annum. Unsecured Revolving Credit Facility On December 15, 2015, the Company entered into a credit agreement (the “Credit Agreement”), providing for a senior, unsecured revolving credit facility with initial aggregate lending commitments of up to $40.0 million (the “Unsecured Revolving Credit Facility”). Following amendments to the Credit Agreement, the aggregate lending commitment available under the Unsecured Revolving Credit Facility as of September 30, 2019 was $215.0 million , the maximum aggregate amount of the Unsecured Revolving Credit Facility was $275.0 million , and the termination date with respect to commitments under the Unsecured Revolving Credit Facility was December 14, 2021. As of September 30, 2019 , the interest rates on outstanding borrowings under the Unsecured Revolving Credit Facility ranged from 4.53% to 4.55% per annum. Senior Unsecured Notes On August 8, 2019, the Company issued $75.0 million aggregate principal amount of senior unsecured notes due on August 8, 2026 at a fixed rate of 4.00% per annum to Prudential Private Capital in a Section 4(a)(2) private placement transaction and received proceeds of $73.3 million . A brokerage fee of approximately $1.5 million associated with the issuance was paid at closing. The brokerage fee, and other debt issuance costs of approximately $0.2 million , were deferred and reduced the amount of debt on our consolidated balance sheet. The Company used the net proceeds from the issuance of the senior unsecured notes to repay borrowings under the Company’s existing revolving credit facilities. Principal on the senior unsecured notes is required to be paid in increments of $12.5 million on August 8, 2024 and $12.5 million on August 8, 2025. The final principal payment of $50.0 million is due on August 8, 2026. Optional prepayment is allowed with payment of a “make-whole” penalty which fluctuates depending on market interest rates. Interest will be payable quarterly in arrears commencing November 8, 2019. Under the terms of the senior unsecured notes, the Company is required, among other things, to maintain compliance with various financial covenants, including maximum leverage ratios, a minimum interest coverage ratio, and a minimum consolidated tangible net worth. The senior unsecured notes are guaranteed on an unsecured senior basis by the Company’s significant subsidiaries and certain other subsidiaries. The senior unsecured notes will rank equally in right of payment with all of the Company’s existing and future senior unsecured and unsubordinated indebtedness.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION Share-Based Award Activity During the nine months ended September 30, 2019 , the Company granted restricted stock awards (“RSAs”) under its 2014 Omnibus Equity Incentive Plan to executive officers (“EOs”) and members of the BOD. The RSAs granted to the EOs were 100% vested and non-forfeitable on the grant date. Some members of the BOD elected to defer up to 100% of their annual retainer fee in the form of common stock. The RSAs granted to the BOD will become fully vested on the earlier of (i) the first anniversary of the date of grant or (ii) the date of the Company’s 2020 annual meeting of stockholders. The fair value of the RSAs granted to EOs and the BOD was recorded as share-based compensation expense on the grant date or over the vesting period, as applicable. The Company withheld 59,116 shares of common stock from EOs, at a total cost of $0.5 million , to satisfy statutory minimum tax requirements upon grant of the RSAs. A summary of share-based awards activity during the nine months ended September 30, 2019 is as follows: Number of Shares Weighted Average Grant Date Fair Value per Share (in thousands) Nonvested, December 31, 2018 34 $ 12.00 Granted 219 $ 9.14 Vested (194 ) $ 9.67 Forfeited — $ — Nonvested, September 30, 2019 59 $ 9.05 Stock Options A summary of stock options activity during the nine months ended September 30, 2019 is as follows: Number of Shares Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (in thousands) (in years) (in thousands) Options outstanding, December 31, 2018 500 $ 7.49 Granted — — Exercised — — Forfeited — — Options outstanding, September 30, 2019 500 $ 7.49 5.08 $ 1,605 Options exercisable, September 30, 2019 400 $ 7.49 5.08 $ 1,284 A summary of unvested stock options activity during the nine months ended September 30, 2019 is as follows: Number of Shares Weighted Average Grant Date Fair Value per Share (in thousands) Unvested, December 31, 2018 100 $ 2.88 Granted — — Vested — — Forfeited — — Unvested, September 30, 2019 100 $ 2.88 Share-Based Compensation Expense Share-based compensation expense was $0.2 million and $2.0 million for the three and nine months ended September 30, 2019 , respectively, and $0.2 million and $1.6 million for the three and nine months ended September 30, 2018 , respectively. Recognized tax benefit related to share-based compensation expense was $0.0 million and $0.5 million for the three and nine months ended September 30, 2019 , respectively, and $0.0 million and $0.4 million for the three and nine months ended September 30, 2018 , respectively. As of September 30, 2019 , the estimated total remaining unamortized share-based compensation expense related to unvested RSAs, net of forfeitures, was $0.3 million which is expected to be recognized over a weighted-average period of 0.6 years. As of September 30, 2019 , the estimated total remaining unamortized share-based compensation expense related to stock options, net of forfeitures, was $0.02 million which is expected to be recognized over a weighted-average period of 0.1 years.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2019
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS During the three and nine months ended September 30, 2019 and 2018 , the Company had the following related party transactions through the normal course of business. Suwanee Station In March 2016, the Company purchased undeveloped land for 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 The Providence Group of Georgia, L.L.C. (“TPG”), the Company’s controlled subsidiary, 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. During the three and nine months ended September 30, 2019 , TPG purchased 0 and 13 lots within the community for $0.0 million and $0.5 million , respectively. During the three and nine months ended September 30, 2018 , TPG purchased 7 and 18 lots within the community for $0.3 million and $1.0 million , respectively. As of September 30, 2019 , there were no lots remaining to be sold. Total capital distributions as of September 30, 2019 were $3.3 million . Total distributions made by the partnership during the three and nine months ended September 30, 2019 were $0.0 million and $0.9 million , respectively, of which $0.0 million and $0.5 million , respectively, were paid to the Company. Total distributions made by the partnership during the three and nine months ended September 30, 2018 were $0.2 million and $0.9 million , respectively, of which $0.1 million and $0.4 million , respectively, were paid to the Company. Final capital distributions were made during the three months ended June 30, 2019, and the affiliated entity has ceased its activity. 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. Corporate Officers Trevor Brickman, the son of Green Brick’s Chief Executive Officer, is the President of Centre Living Homes, LLC (“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. PrimeLending Venture Management, LLC Beginning September 2019, Trophy Signature Homes, LLC (“Trophy”) subleases office space from PrimeLending Venture Management, LLC, a majority partner in Green Brick Mortgage, LLC, one of our joint ventures accounted for by the equity method. During the nine months ended September 30, 2019 , Trophy incurred de minimis rent expense under this lease agreement. As of September 30, 2019 , there were no amounts due to the affiliated entity related to this lease agreement. GRBK GHO GRBK GHO leases office space from entities affiliated with the president of GRBK GHO. During the nine months ended September 30, 2019 , GRBK GHO incurred $0.1 million rent expense under such lease agreements. As of September 30, 2019 , there were no amounts due to the affiliated entities related to such lease agreements. GRBK GHO receives title closing services on the purchase of land and third-party lots from an entity affiliated with the president of GRBK GHO. During the nine months ended September 30, 2019 , GRBK GHO incurred de minimis fees related to such title closing services. As of September 30, 2019 , no

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2019USD ($)
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, receivables, earnest money deposits, other assets, accounts payable, accrued expenses, customer and builder deposits, borrowings on lines of credit, and senior unsecured notes. Per the fair value hierarchy, level 1 financial instruments include: cash, restricted cash, receivables, earnest money deposits, other assets, accounts payable, accrued expenses, and customer and builder deposits due to their short-term nature. 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 level 1 financial instruments does not differ materially from the aggregate carrying values recorded in the condensed consolidated financial statements as of September 30, 2019 and December 31, 2018 . Level 2 financial instruments include borrowings on lines of credit and senior unsecured notes. Due to the short-term nature and floating interest rate terms, the carrying amounts of borrowings on lines of credit are deemed to approximate fair value. The estimated fair value of the senior unsecured notes as of September 30, 2019 was $78.2 million . The fair value of the contingent consideration liability related to the GRBK GHO business combination was estimated using the internally developed discounted cash flow analysis. As the measurement of the contingent consideration is based primarily on significant inputs not observable in the market, it represents a level 3 measurement. Key inputs in measuring the fair value of the contingent consideration liability are management’s projections of GRBK GHO’s net income and debt, and the annual discount rate of 16.5% that reflects the risk associated with achieving the milestones of the contingent consideration payments. The reconciliation of the beginning and ending balances for level 3 measurements is as follows (in thousands): Carrying Value Estimated Fair Value Contingent consideration liability, balance as of December 31, 2018 $ 2,207 $ 2,207 Payment of contingent consideration (514 ) (514 ) Payment of contingent consideration in excess of acquisition date fair value (1,332 ) (1,332 ) Change in fair value of contingent consideration 1,749 1,749 Contingent consideration liability, balance as of September 30, 2019 $ 2,110 $ 2,110 There were no transfers between the levels of the fair value hierarchy for any of our financial instruments during the three and nine months ended September 30, 2019 . Fair Value of Nonfinancial Instruments Nonfinancial assets and liabilities include 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 fair value. Per the fair value hierarchy, these items are level 3 nonfinancial instruments. For additional information on the Company’s inventory, refer to Note 4.
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net	$ 0
Measurement Input, Discount Rate [Member] | GHO Homes [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	0.165

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Letters of Credit and Performance Bonds During the ordinary course of business, certain regulatory agencies and municipalities require the Company to post letters of credit or performance bonds related to development projects. As of September 30, 2019 and December 31, 2018 , letters of credit outstanding were $3.3 million and $2.2 million , respectively, and performance bonds outstanding totaled $5.2 million and $5.3 million , respectively. The Company does not believe that it is likely that any material claims will be made under a letter of credit or performance bond in the foreseeable future. Warranties Warranty accruals are included within accrued expenses on the condensed consolidated balance sheets. Warranty activity during the three and nine months ended September 30, 2019 and 2018 consisted of the following (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Warranty accrual, beginning of period $ 2,898 $ 2,539 $ 2,980 $ 2,083 Warranties issued 930 532 2,351 1,645 Changes in liability for existing warranties 169 34 72 17 Settlements (639 ) (455 ) (2,045 ) (1,095 ) Warranty accrual, end of period $ 3,358 $ 2,650 $ 3,358 $ 2,650 Operating Leases The Company has leases associated with office and design center space that, at the commencement date, have a lease term of more than 12 months and are classified as operating leases. The exercise of any extension options available in such operating lease contracts is not reasonably certain. Operating lease cost of $0.3 million and $0.9 million for the three and nine months ended September 30, 2019 , respectively, is included in selling, general and administrative expense in the condensed consolidated statements of income. For the three and nine months ended September 30, 2019 , cash paid for amounts included in the measurement of operating lease liabilities was $0.3 million and $0.9 million , respectively. As of September 30, 2019 , the weighted-average remaining lease term and the weighted-average discount rate used in calculating our lease liabilities were 3.5 years and 5.22% , respectively. The future annual undiscounted cash flows in relation to the operating leases and a reconciliation of such undiscounted cash flows to the operating lease liabilities recognized in the condensed consolidated balance sheet as of September 30, 2019 are presented below (in thousands): Remainder of 2019 $ 321 2020 1,320 2021 1,096 2022 819 2023 622 Total future lease payments $ 4,178 Less: Interest 341 Present value of lease liabilities $ 3,837 The Company elected the short-term lease recognition exemption for all leases that, at the commencement date, have a lease term of 12 months or less and do not include an option to purchase the underlying asset that the Company is reasonably certain to exercise. For such leases, the Company does not recognize ROU assets or lease liabilities and instead recognizes lease payments in the condensed consolidated income statements on a straight-line basis. Short-term lease cost of $0.1 million and $0.3 million for the three and nine months ended September 30, 2019 , respectively, related to such lease contracts 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. Certain of our earnest money deposits are subject to first priority liens on the land that we have contracted to procure. As of September 30, 2019 and December 31, 2018 , there were 2,855 and 1,843 lots under option, respectively, including option contracts for land intended to be developed into lots. The land and lot option contracts in place as of September 30, 2019 provide for potential land and lot purchase payments through 2022. If each option contract in place as of September 30, 2019 was exercised, expected purchase payments would be as follows (in thousands): Total Remainder of 2019 $ 52,978 2020 113,458 2021 49,861 2022 8,075 Total $ 224,372 Deposits and pre-acquisition costs written off related to option contracts abandoned totaled $0.0 million and $0.5 million for the three and nine months ended September 30, 2019 , respectively. Deposits and pre-acquisition costs written off related to option contracts abandoned totaled $0.1 million and $0.2 million for the three and nine months ended September 30, 2018 , respectively. 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, title company regulations, 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 an accrual for legal claims and regulatory matters when they are probable of occurring and a potential loss is reasonably estimable. The Company accrues for these matters based on facts and circumstances specific to each matter and revises these estimates when necessary. In view of the inherent difficulty of predicting outcomes of legal claims and related contingencies, the Company generally cannot predict their ultimate resolution, related timing or eventual loss. If evaluations indicate loss contingencies that could be material are not probable, but are reasonably possible, the Company will disclose their nature with an estimate of the possible range of losses or a statement that such loss is not reasonably estimable. We believe that the disposition of legal claims and related contingencies will not have a material adverse effect on our results of operations and liquidity or on our financial condition.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION Financial information relating to the Company’s reportable segments is as follows. Operational results of each reportable segment are not necessarily indicative of the results that would have been achieved had the reportable segment been an independent, stand-alone entity during the periods presented. Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Revenues: (1) Builder operations Central $ 104,685 $ 60,886 $ 268,278 $ 202,224 Southeast 95,973 78,803 269,032 209,249 Total builder operations 200,658 139,689 537,310 411,473 Land development 8,746 12,363 24,228 27,054 Total revenues $ 209,404 $ 152,052 $ 561,538 $ 438,527 Gross profit: Builder operations Central $ 24,237 $ 16,002 $ 60,257 $ 55,364 Southeast 23,540 21,913 67,682 57,626 Total builder operations 47,777 37,915 127,939 112,990 Land development 2,300 2,142 6,202 6,591 Corporate, other and unallocated (2) (5,352 ) (3,389 ) (13,769 ) (9,208 ) Total gross profit $ 44,725 $ 36,668 $ 120,372 $ 110,373 Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Income before income taxes: Builder operations Central $ 10,734 $ 6,984 $ 24,588 $ 28,026 Southeast 12,429 12,649 36,543 33,978 Total builder operations 23,163 19,633 61,131 62,004 Land development 4,067 1,292 8,366 4,975 Corporate, other and unallocated (3) (2,258 ) (818 ) (7,750 ) (6,031 ) Income before income taxes $ 24,972 $ 20,107 $ 61,747 $ 60,948 September 30, 2019 December 31, 2018 Inventory: Builder operations Central $ 219,416 $ 160,980 Southeast 167,544 159,616 Total builder operations 386,960 320,596 Land development 329,688 329,105 Corporate, other and unallocated (4) 24,151 19,260 Total inventory $ 740,799 $ 668,961 Goodwill: (5) Builder operations - Southeast $ 680 $ 680 (1) The sum of Builder operations Central and Southeast segments’ revenues does not equal residential units revenue included in the condensed consolidated statements of income in periods when our controlled builders have revenues from land or lot closings, which for the three and nine months ended September 30, 2019 was $0.7 million and $0.8 million , compared to $0.2 million and $4.6 million for the three and nine months ended September 30, 2018 , respectively. (2) Corporate, other and unallocated gross loss is comprised of capitalized overhead and capitalized interest adjustments that are not allocated to operating segments. (3) Corporate, other and unallocated loss before income taxes includes results from Green Brick Title, LLC and investments in unconsolidated subsidiaries, in addition to capitalized cost adjustments that are not allocated to operating segments. (4) Corporate, other and unallocated inventory consists of capitalized overhead and interest related to work in process and land under development. (5) In connection with the GRBK GHO business combination, the Company recorded goodwill of $0.7 million .

Significant Accounting Polici_2

Significant Accounting Policies Changes in Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Accounting [Text Block]	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. The condensed consolidated balance sheet as of December 31, 2018 was derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 . In the opinion of management, the accompanying unaudited 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, 2018 . Operating results for the three and nine months ended September 30, 2019 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2019 or subsequent periods.
Revenue from Contract with Customer [Policy Text Block]	Revenue Recognition 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 to third parties are also expensed as incurred upon closing. Sales commissions on the sale of homes and land parcels are included in selling, general and administrative expense in the consolidated statements of income.

Business Combination (Tables)

Business Combination (Tables)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Redeemable Noncontrolling Interest [Table Text Block]	The following table shows the changes in redeemable noncontrolling interest in equity of consolidated subsidiary during the three and nine months ended September 30, 2019 (in thousands): Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Redeemable noncontrolling interest, beginning of period $ 12,509 $ 8,531 Net income attributable to redeemable noncontrolling interest partner 863 2,528 Distributions of income to redeemable noncontrolling interest partner — (527 ) Accretion of redeemable noncontrolling interest (1,163 ) 1,677 Redeemable noncontrolling interest, end of period $ 12,209 $ 12,209

Net Income Attributable to Gr_2

Net Income Attributable to Green Brick Partners, Inc. Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
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 is as follows (in thousands, except per share amounts): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Net income attributable to Green Brick Partners, Inc. $ 15,671 $ 12,197 $ 42,736 $ 38,269 Weighted-average number of shares outstanding - basic 50,475 50,686 50,564 50,642 Basic net income attributable to Green Brick Partners, Inc. per share $ 0.31 $ 0.24 $ 0.85 $ 0.76 Weighted-average number of shares outstanding - basic 50,475 50,686 50,564 50,642 Dilutive effect of stock options and restricted stock awards 122 92 78 118 Weighted-average number of shares outstanding - diluted 50,597 50,778 50,642 50,760 Diluted net income attributable to Green Brick Partners, Inc. per share $ 0.31 $ 0.24 $ 0.84 $ 0.75
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The following shares which could potentially dilute earnings per share in the future are not included in the determination of diluted net income attributable to Green Brick Partners, Inc. per common share (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Antidilutive options to purchase common stock and restricted stock awards — 3 19 7

Inventory (Tables)

Inventory (Tables)	9 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
Schedule of Real Estate Inventory	A summary of inventory is as follows (in thousands): September 30, 2019 December 31, 2018 Homes completed or under construction $ 321,058 $ 268,763 Land and lots - developed and under development 418,700 399,809 Land held for sale 1,041 389 Total inventory $ 740,799 $ 668,961
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 September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Interest capitalized at beginning of period $ 17,199 $ 12,143 $ 14,780 $ 10,474 Interest incurred 3,052 2,479 9,066 6,113 Interest charged to cost of revenues (2,324 ) (1,114 ) (5,919 ) (3,079 ) Interest capitalized at end of period $ 17,927 $ 13,508 $ 17,927 $ 13,508

Investment in Unconsolidated _2

Investment in Unconsolidated Entities (Tables)	9 Months Ended
	Sep. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	A summary of the unaudited condensed financial information of the unconsolidated entities that are accounted for by the equity method is as follows (in thousands): September 30, 2019 December 31, 2018 Assets: Cash $ 11,642 $ 14,584 Accounts receivable 2,696 1,259 Bonds and notes receivable 5,864 5,864 Loans held for sale, at fair value 14,944 3,083 Inventory 54,032 44,375 Other assets 4,255 3,132 Total assets $ 93,433 $ 72,297 Liabilities: Accounts payable $ 5,835 $ 2,173 Accrued expenses and other liabilities 7,758 5,328 Notes payable 39,782 31,402 Total liabilities $ 53,375 $ 38,903 Owners’ equity: Green Brick $ 19,971 $ 15,653 Others 20,087 17,741 Total owners’ equity $ 40,058 $ 33,394 Total liabilities and owners’ equity $ 93,433 $ 72,297 Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Revenues $ 42,428 $ 43,758 $ 116,786 $ 120,710 Costs and expenses 36,227 38,308 101,348 107,328 Net earnings of unconsolidated entities $ 6,201 $ 5,450 $ 15,438 $ 13,382 Company’s share in net earnings of unconsolidated entities $ 3,022 $ 2,719 $ 7,565 $ 6,534

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Schedule of Lines of Credit Outstanding	Lines of Credit Borrowings on lines of credit outstanding, net of debt issuance costs, as of September 30, 2019 and December 31, 2018 consisted of the following (in thousands): September 30, 2019 December 31, 2018 Revolving credit facility $ 31,500 $ 46,500 Unsecured revolving credit facility 134,500 155,500 Debt issuance costs, net of amortization (1,208 ) (1,614 ) Total borrowings on lines of credit, net $ 164,792 $ 200,386

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Schedule of Share-Based Awards Activity	A summary of share-based awards activity during the nine months ended September 30, 2019 is as follows: Number of Shares Weighted Average Grant Date Fair Value per Share (in thousands) Nonvested, December 31, 2018 34 $ 12.00 Granted 219 $ 9.14 Vested (194 ) $ 9.67 Forfeited — $ — Nonvested, September 30, 2019 59 $ 9.05
Summary of Stock Option Activity	A summary of stock options activity during the nine months ended September 30, 2019 is as follows: Number of Shares Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (in thousands) (in years) (in thousands) Options outstanding, December 31, 2018 500 $ 7.49 Granted — — Exercised — — Forfeited — — Options outstanding, September 30, 2019 500 $ 7.49 5.08 $ 1,605 Options exercisable, September 30, 2019 400 $ 7.49 5.08 $ 1,284 A summary of unvested stock options activity during the nine months ended September 30, 2019 is as follows: Number of Shares Weighted Average Grant Date Fair Value per Share (in thousands) Unvested, December 31, 2018 100 $ 2.88 Granted — — Vested — — Forfeited — — Unvested, September 30, 2019 100 $ 2.88

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]	The reconciliation of the beginning and ending balances for level 3 measurements is as follows (in thousands): Carrying Value Estimated Fair Value Contingent consideration liability, balance as of December 31, 2018 $ 2,207 $ 2,207 Payment of contingent consideration (514 ) (514 ) Payment of contingent consideration in excess of acquisition date fair value (1,332 ) (1,332 ) Change in fair value of contingent consideration 1,749 1,749 Contingent consideration liability, balance as of September 30, 2019 $ 2,110 $ 2,110

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of Warranty Activity	Warranty activity during the three and nine months ended September 30, 2019 and 2018 consisted of the following (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Warranty accrual, beginning of period $ 2,898 $ 2,539 $ 2,980 $ 2,083 Warranties issued 930 532 2,351 1,645 Changes in liability for existing warranties 169 34 72 17 Settlements (639 ) (455 ) (2,045 ) (1,095 ) Warranty accrual, end of period $ 3,358 $ 2,650 $ 3,358 $ 2,650
Schedule of Annual Minimum Operating Lease Payments	The future annual undiscounted cash flows in relation to the operating leases and a reconciliation of such undiscounted cash flows to the operating lease liabilities recognized in the condensed consolidated balance sheet as of September 30, 2019 are presented below (in thousands): Remainder of 2019 $ 321 2020 1,320 2021 1,096 2022 819 2023 622 Total future lease payments $ 4,178 Less: Interest 341 Present value of lease liabilities $ 3,837
Schedule of Expected Land and Lot Purchase Payments Under Option Agreements	If each option contract in place as of September 30, 2019 was exercised, expected purchase payments would be as follows (in thousands): Total Remainder of 2019 $ 52,978 2020 113,458 2021 49,861 2022 8,075 Total $ 224,372

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2019
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 September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Revenues: (1) Builder operations Central $ 104,685 $ 60,886 $ 268,278 $ 202,224 Southeast 95,973 78,803 269,032 209,249 Total builder operations 200,658 139,689 537,310 411,473 Land development 8,746 12,363 24,228 27,054 Total revenues $ 209,404 $ 152,052 $ 561,538 $ 438,527 Gross profit: Builder operations Central $ 24,237 $ 16,002 $ 60,257 $ 55,364 Southeast 23,540 21,913 67,682 57,626 Total builder operations 47,777 37,915 127,939 112,990 Land development 2,300 2,142 6,202 6,591 Corporate, other and unallocated (2) (5,352 ) (3,389 ) (13,769 ) (9,208 ) Total gross profit $ 44,725 $ 36,668 $ 120,372 $ 110,373 Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Income before income taxes: Builder operations Central $ 10,734 $ 6,984 $ 24,588 $ 28,026 Southeast 12,429 12,649 36,543 33,978 Total builder operations 23,163 19,633 61,131 62,004 Land development 4,067 1,292 8,366 4,975 Corporate, other and unallocated (3) (2,258 ) (818 ) (7,750 ) (6,031 ) Income before income taxes $ 24,972 $ 20,107 $ 61,747 $ 60,948 September 30, 2019 December 31, 2018 Inventory: Builder operations Central $ 219,416 $ 160,980 Southeast 167,544 159,616 Total builder operations 386,960 320,596 Land development 329,688 329,105 Corporate, other and unallocated (4) 24,151 19,260 Total inventory $ 740,799 $ 668,961 Goodwill: (5) Builder operations - Southeast $ 680 $ 680 (1) The sum of Builder operations Central and Southeast segments’ revenues does not equal residential units revenue included in the condensed consolidated statements of income in periods when our controlled builders have revenues from land or lot closings, which for the three and nine months ended September 30, 2019 was $0.7 million and $0.8 million , compared to $0.2 million and $4.6 million for the three and nine months ended September 30, 2018 , respectively. (2) Corporate, other and unallocated gross loss is comprised of capitalized overhead and capitalized interest adjustments that are not allocated to operating segments. (3) Corporate, other and unallocated loss before income taxes includes results from Green Brick Title, LLC and investments in unconsolidated subsidiaries, in addition to capitalized cost adjustments that are not allocated to operating segments. (4) Corporate, other and unallocated inventory consists of capitalized overhead and interest related to work in process and land under development. (5) In connection with the GRBK GHO business combination, the Company recorded goodwill of $0.7 million .

Significant Accounting Polici_3

Significant Accounting Policies Leases, Adoption of ASC 842 (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Lease, Liability	$ 3,837	$ 4,200	$ 0
Operating Lease, Right-of-Use Asset	$ 3,731	4,100	$ 0
Deferred Rent Credit		$ 100

Business Combination (Narrativ

Business Combination (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Payment for Contingent Consideration Liability, Investing Activities			$ 1,800
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount	$ 12,209		12,209		$ 12,509	$ 8,531
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	863		2,528
Temporary Equity, Interest in Subsidiary Earnings	0		(527)
Noncontrolling Interest, Change in Redemption Value	(1,163)		(1,677)
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	3,000		3,000
Assets acquired
Goodwill	680		680			$ 680
Liabilities assumed
Contingent consideration	3,900		3,900
Homebuilding revenues	209,404	$ 152,052	561,538	$ 438,527
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ 24,972	$ 20,107	$ 61,747	$ 60,948
GHO Homes [Member]
Liabilities assumed
Percent of equity interests acquired	80.00%		80.00%
Ownership percentage by noncontrolling owners	20.00%		20.00%

Net Income Attributable to Gr_3

Net Income Attributable to Green Brick Partners, Inc. Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net income attributable to Green Brick Partners, Inc.	$ 15,671	$ 12,197	$ 42,736	$ 38,269
Weighted-average number of shares outstanding —basic (in shares)	50,475	50,686	50,564	50,642
Basic net income attributable to Green Brick Partners, Inc. per share (in dollars per share)	$ 0.31	$ 0.24	$ 0.85	$ 0.76
Dilutive effect of stock options and restricted stock awards (in shares)	122	92	78	118
Weighted-average number of shares outstanding —diluted (in shares)	50,597	50,778	50,642	50,760
Diluted net income attributable to Green Brick Partners, Inc. per share (in dollars per share)	$ 0.31	$ 0.24	$ 0.84	$ 0.75

Net Income Attributable to Gr_4

Net Income Attributable to Green Brick Partners, Inc. Per Share (Antidilutive Options Excluded From Calculation of Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Antidilutive options to purchase common stock and restricted stock awards (in shares)	0	3	19	7

Inventory (Details)

Inventory (Details) $ in Thousands, number in Millions	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Inventory Disclosure [Abstract]
Finished Homes and Homes under Construction	$ 321,058		$ 268,763
Inventory, Real Estate, Land and Land Development Costs	418,700		399,809
Inventory, Land Held-for-sale	1,041		389
Total inventory	$ 740,799		$ 668,961
Inventory Operative Builders With Potential Indicators Of Impairment	10.7
Inventory Write-down	$ 100	$ 100

Inventory (Capitalization of In

Inventory (Capitalization of Interest) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Interest capitalized at beginning of period	$ 17,199	$ 12,143	$ 14,780	$ 10,474
Interest incurred	3,052	2,479	9,066	6,113
Interest charged to cost of revenues	(2,324)	(1,114)	(5,919)	(3,079)
Interest capitalized at end of period	$ 17,927	$ 13,508	$ 17,927	$ 13,508

Revenue Recognition (Narrative)

Revenue Recognition (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 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 for the three months ended September 30, 2019 and 2018 (in thousands): Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 Residential units revenue Land and lots revenue Residential units revenue Land and lots revenue Primary Geographical Market Central $ 104,685 $ 8,746 $ 60,886 $ 12,363 Southeast 95,233 740 78,573 230 Total revenues $ 199,918 $ 9,486 $ 139,459 $ 12,593 Type of Customer Homebuyers $ 199,918 $ 185 $ 139,459 $ 230 Homebuilders — 9,301 — 12,363 Total revenues $ 199,918 $ 9,486 $ 139,459 $ 12,593 Product Type Residential units $ 199,918 $ — $ 139,459 $ — Land and lots — 9,486 — 12,593 Total revenues $ 199,918 $ 9,486 $ 139,459 $ 12,593 Timing of Revenue Recognition Transferred at a point in time $ 197,280 $ 9,486 $ 137,399 $ 12,593 Transferred over time 2,638 — 2,060 — Total revenues $ 199,918 $ 9,486 $ 139,459 $ 12,593 Revenue recognized over time represents revenue from mechanic’s lien contracts. The following reflects the disaggregation of revenue by primary geographic market, type of customer, product type, and timing of revenue recognition for the nine months ended September 30, 2019 and 2018 (in thousands): Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 Residential units revenue Land and lots revenue Residential units revenue Land and lots revenue Primary Geographical Market Central $ 268,278 $ 24,228 $ 202,224 $ 27,054 Southeast 268,282 750 204,679 4,570 Total revenues $ 536,560 $ 24,978 $ 406,903 $ 31,624 Type of Customer Homebuyers $ 536,560 $ 185 $ 406,903 $ 670 Homebuilders — 24,793 — 30,954 Total revenues $ 536,560 $ 24,978 $ 406,903 $ 31,624 Product Type Residential units $ 536,560 $ — $ 406,903 $ — Land and lots — 24,978 — 31,624 Total revenues $ 536,560 $ 24,978 $ 406,903 $ 31,624 Timing of Revenue Recognition Transferred at a point in time $ 529,003 $ 24,978 $ 401,643 $ 31,624 Transferred over time 7,557 — 5,260 — Total revenues $ 536,560 $ 24,978 $ 406,903 $ 31,624
Remaining Performance Obligation, Expected Timing of Satisfaction			he 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 2019 $ 10,824 2020 36,720 2021 16,859 Total $ 64,403
Opening and Closing Contract Balances Included in Customer and Builder Deposits on Balance Sheet and Deposits Recognized as Revenue			The amount of deposits on residential units and land and lots held as of the beginning of the period and recognized as revenue during the nine months ended September 30, 2019 and 2018 are as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Type of Customer Homebuyers $ 7,661 $ 6,007 $ 13,335 $ 13,036 Homebuilders 981 480 2,663 711 Total deposits recognized as revenue $ 8,642 $ 6,487 $ 15,998 $ 13,747 Opening and closing contract balances included in customer and builder deposits on the condensed consolidated balance sheets are as follows (in thousands): September 30, 2019 December 31, 2018 Customer and builder deposits $ 27,122 $ 31,978
Revenue Recognition			REVENUE RECOGNITION Disaggregation of Revenue The following reflects the disaggregation of revenue by primary geographic market, type of customer, product type, and timing of revenue recognition for the three months ended September 30, 2019 and 2018 (in thousands): Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 Residential units revenue Land and lots revenue Residential units revenue Land and lots revenue Primary Geographical Market Central $ 104,685 $ 8,746 $ 60,886 $ 12,363 Southeast 95,233 740 78,573 230 Total revenues $ 199,918 $ 9,486 $ 139,459 $ 12,593 Type of Customer Homebuyers $ 199,918 $ 185 $ 139,459 $ 230 Homebuilders — 9,301 — 12,363 Total revenues $ 199,918 $ 9,486 $ 139,459 $ 12,593 Product Type Residential units $ 199,918 $ — $ 139,459 $ — Land and lots — 9,486 — 12,593 Total revenues $ 199,918 $ 9,486 $ 139,459 $ 12,593 Timing of Revenue Recognition Transferred at a point in time $ 197,280 $ 9,486 $ 137,399 $ 12,593 Transferred over time 2,638 — 2,060 — Total revenues $ 199,918 $ 9,486 $ 139,459 $ 12,593 Revenue recognized over time represents revenue from mechanic’s lien contracts. The following reflects the disaggregation of revenue by primary geographic market, type of customer, product type, and timing of revenue recognition for the nine months ended September 30, 2019 and 2018 (in thousands): Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 Residential units revenue Land and lots revenue Residential units revenue Land and lots revenue Primary Geographical Market Central $ 268,278 $ 24,228 $ 202,224 $ 27,054 Southeast 268,282 750 204,679 4,570 Total revenues $ 536,560 $ 24,978 $ 406,903 $ 31,624 Type of Customer Homebuyers $ 536,560 $ 185 $ 406,903 $ 670 Homebuilders — 24,793 — 30,954 Total revenues $ 536,560 $ 24,978 $ 406,903 $ 31,624 Product Type Residential units $ 536,560 $ — $ 406,903 $ — Land and lots — 24,978 — 31,624 Total revenues $ 536,560 $ 24,978 $ 406,903 $ 31,624 Timing of Revenue Recognition Transferred at a point in time $ 529,003 $ 24,978 $ 401,643 $ 31,624 Transferred over time 7,557 — 5,260 — Total revenues $ 536,560 $ 24,978 $ 406,903 $ 31,624 Contract Balances Opening and closing contract balances included in customer and builder deposits on the condensed consolidated balance sheets are as follows (in thousands): September 30, 2019 December 31, 2018 Customer and builder deposits $ 27,122 $ 31,978 The difference between the opening and closing balances of customer and builder deposits results from the timing difference between the customers’ payments of deposits and the Company’s performance, impacted slightly by terminations of contracts. The amount of deposits on residential units and land and lots held as of the beginning of the period and recognized as revenue during the nine months ended September 30, 2019 and 2018 are as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Type of Customer Homebuyers $ 7,661 $ 6,007 $ 13,335 $ 13,036 Homebuilders 981 480 2,663 711 Total deposits recognized as revenue $ 8,642 $ 6,487 $ 15,998 $ 13,747 Performance Obligations There was no revenue recognized during the nine months ended September 30, 2019 and 2018 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 $64.4 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 2019 $ 10,824 2020 36,720 2021 16,859 Total $ 64,403 The timing of lot takedowns is 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, Revenue from Contracts with Customers, and therefore has not disclosed the transaction price allocated to remaining performance obligations as of the end of the reporting period.
Disaggregation of Revenue [Line Items]
Total revenues	$ 209,404,000	$ 152,052,000	$ 561,538,000	$ 438,527,000
Customer and builder deposits	27,122,000		27,122,000		$ 31,978,000
Revenue recognized	8,642,000	6,487,000	15,998,000	13,747,000
Revenue recognized from performance obligations satisfied in prior periods			0
Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Total revenues	199,918,000	139,459,000	536,560,000	406,903,000
Residential Real Estate [Member] | Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	197,280,000	137,399,000	529,003,000	401,643,000
Residential Real Estate [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Total revenues	2,638,000	2,060,000	7,557,000	5,260,000
Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	9,486,000	12,593,000	24,978,000	31,624,000
Real Estate, Other [Member] | Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	9,486,000	12,593,000	24,978,000	31,624,000
Homebuilders [Member] | Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Revenue recognized	981,000	480,000	2,663,000	711,000
Homebuilders [Member] | Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	9,301,000	12,363,000	24,793,000	30,954,000
Homebuyers [Member] | Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Total revenues	199,918,000	139,459,000	536,560,000	406,903,000
Revenue recognized	7,661,000	6,007,000	13,335,000	13,036,000
Homebuyers [Member] | Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	185,000	230,000	185,000	670,000
Central | Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Total revenues	104,685,000	60,886,000	268,278,000	202,224,000
Central | Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	8,746,000	12,363,000	24,228,000	27,054,000
Southeast [Domain] | Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Total revenues	95,233,000	78,573,000	268,282,000	204,679,000
Southeast [Domain] | Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	740,000	230,000	750,000	4,570,000
Land development
Disaggregation of Revenue [Line Items]
Total revenues	8,746,000	12,363,000	24,228,000	27,054,000
Land development | Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Builder operations
Disaggregation of Revenue [Line Items]
Total revenues	200,658,000	139,689,000
Builder operations | Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Total revenues	700,000	200,000	800,000	4,600,000
Builder operations | Land and Lots [Member]
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Builder operations | Central
Disaggregation of Revenue [Line Items]
Total revenues	104,685,000	60,886,000
Builder operations | Southeast [Domain]
Disaggregation of Revenue [Line Items]
Total revenues	$ 95,973,000	$ 78,803,000	$ 269,032,000	$ 209,249,000

Revenue Recognition (Transactio

Revenue Recognition (Transaction Price Allocated to Remaining Performance Obligations) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Revenue from Contract with Customer [Abstract]
Revenue, Practical Expedient, Remaining Performance Obligation, Description	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, Revenue from Contracts with Customers, and therefore has not disclosed the transaction price allocated to remaining performance obligations as of the end of the reporting period.
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 10,824
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	36,720
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	16,859
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	$ 64,403

Investment in Unconsolidated _3

Investment in Unconsolidated Entities (Summary of Financial Information of Investment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Assets:
Cash	$ 11,642		$ 11,642		$ 14,584
Accounts receivable	2,696		2,696		1,259
EquityMethodInvestmentsSummarizedFinancialInformationBondsReceivable	5,864		5,864		5,864
EquityMethodInvestmentSummarizedFinancialInformationLoansHeldForSale	14,944		14,944		3,083
Inventory	54,032		54,032		44,375
Other assets	4,255		4,255		3,132
Total assets	93,433		93,433		72,297
Liabilities:
Accounts payable	5,835		5,835		2,173
Accrued expenses and other liabilities	7,758		7,758		5,328
Notes payable	39,782		39,782		31,402
Total liabilities	53,375		53,375		38,903
Owners’ equity:
Green Brick	19,971		19,971		15,653
Others	20,087		20,087		17,741
Total owners’ equity	40,058		40,058		33,394
Total liabilities and owners’ equity	93,433		93,433		$ 72,297
Statements of Income (Unaudited)
Revenues	42,428	$ 43,758	116,786	$ 120,710
Costs and expenses	36,227	38,308	101,348	107,328
Net earnings of unconsolidated entities	6,201	5,450	15,438	13,382
Company’s share in net earnings of unconsolidated entities	$ 3,022	$ 2,719	$ 7,565	$ 6,534

Investment in Unconsolidated _4

Investment in Unconsolidated Entities (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01		$ 0.01
Goodwill	$ 680		$ 680		$ 680
Investment in unconsolidated entities	24,444		24,444		$ 20,269
Equity in income of unconsolidated entity	$ 3,022	$ 2,719	$ 7,565	$ 6,534

Debt (Schedule of Lines of Cred

Debt (Schedule of Lines of Credit Outstanding) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Oct. 11, 2019	Jul. 23, 2019	Dec. 31, 2018	Dec. 15, 2015	Jul. 30, 2015
Line of Credit Facility [Line Items]
Letters of Credit Issued			$ 1,300,000
Document Period End Date	Sep. 30, 2019
Long-term Line of Credit	$ 164,792,000			$ 200,386,000
Debt issuance costs, net of amortization	(1,208,000)			(1,614,000)
Letters of Credit Outstanding, Amount	3,300,000			2,200,000
Line of Credit Facility, Remaining Borrowing Capacity	71,800,000
Unsecured Debt [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit	215,000,000				$ 40,000,000
Line of Credit Facility, Maximum Borrowing Capacity	275,000,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit	31,500,000			46,500,000
Line of Credit Facility, Maximum Borrowing Capacity	75,000,000					$ 50,000,000
Letters of Credit Outstanding, Amount	3,200,000
Unsecured Debt [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit	$ 134,500,000			$ 155,500,000
Subsequent Event [Member]
Line of Credit Facility [Line Items]
Letters of Credit Issued		$ 5,700,000
Line of Credit Facility, Remaining Borrowing Capacity		$ 66,100,000

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($)	Aug. 08, 2019	Sep. 30, 2019	Sep. 30, 2018	Aug. 08, 2026	Aug. 08, 2025	Aug. 08, 2024	Jul. 23, 2019	Dec. 31, 2018	Dec. 15, 2015	Jul. 30, 2015
Debt Instrument [Line Items]
Document Period End Date		Sep. 30, 2019
Debt Instrument, Interest Rate, Stated Percentage	4.00%
Proceeds from Issuance of Senior Long-term Debt	$ 73,300,000	$ 75,000,000	$ 0
Debt Instrument, Fee Amount	1,500,000
Payments of Debt Issuance Costs	200,000	1,682,000	228,000
Repayments of Lines of Credit		201,500,000	$ 40,000,000
Letters of Credit Issued							$ 1,300,000
Costs associated with amendment		1,208,000						$ 1,614,000
Borrowings on lines of credit		164,792,000						200,386,000
Line of Credit Facility, Remaining Borrowing Capacity		71,800,000
Senior Notes	$ 75,000,000	73,358,000						0
Unsecured Debt [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		275,000,000
Borrowings on lines of credit		$ 215,000,000							$ 40,000,000
Unsecured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End		4.53%
Unsecured Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End		4.55%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 75,000,000								$ 50,000,000
Borrowings on lines of credit		$ 31,500,000						$ 46,500,000
Line of Credit Facility, Interest Rate at Period End		4.75%
Forecast [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five				$ 50,000,000	$ 12,500,000	$ 12,500,000

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Common Stock, Shares, Issued	50,879,949	50,719,884	50,879,949	50,719,884	50,879,949	50,719,884	50,719,884	50,598,901
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)			50,583,128
Beginning balance	$ 498,643	$ 455,532	$ 485,632	$ 433,038
Ending balance (in shares)	50,488,010		50,488,010
Ending balance	$ 516,493	470,194	$ 516,493	470,194
Common stock, $0.01 par value: 100,000,000 shares authorized; 50,879,949 and 50,719,884 issued and 50,488,010 and 50,583,128 outstanding as of September 30, 2019 and December 31, 2018, respectively	$ 509	$ 507	$ 509	$ 507	$ 509	$ 507	$ 507	$ 506
Treasury Stock, Common, Shares	(391,939)	0	(391,939)	0	(183,938)	(136,756)	0	0
Treasury Stock, Value	$ (3,167)	$ 0	$ (3,167)	$ 0	$ (1,369)	$ (981)	$ 0	$ 0
Additional Paid in Capital	291,111	291,007	291,111	291,007	289,739	291,299	290,842	289,938
Retained Earnings (Accumulated Deficit)	220,262	164,172	220,262	164,172	204,591	177,526	151,975	125,903
Stockholders' Equity Attributable to Parent	508,715	455,686	508,715	455,686	493,470	468,351	443,324	416,347
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	73	72	$ 215	$ 215
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			219,181	140,211
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture			$ 1,466	$ 1,081
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(59,116)	(39,228)
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ (544)	$ (412)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 136	104	$ 354	$ 301
Treasury Stock, Shares, Acquired	(208,001)		(255,183)	0
Treasury Stock, Value, Acquired, Cost Method	$ (1,798)		$ (2,186)	$ 0
Stockholders' Equity Attributable to Noncontrolling Interest	7,778	14,508	7,778	14,508	$ 5,173	$ 17,281	$ 12,208	$ 16,691
Payments to Noncontrolling Interests			10,993	10,746
Stock Issued During Period, Value, Acquisitions			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		(323)	(10,993)	(10,746)
Net income attributable to Green Brick Partners, Inc.	15,671	12,197	42,736	38,269
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	2,605	2,623	1,490	8,563
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	18,276	14,820	44,226	46,832
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture			3	1
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			1	0
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture			1,463	1,080
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			(543)	412
Temporary Equity, Accretion to Redemption Value, Adjustment	$ 1,163	$ (11)	$ (1,677)	$ (115)

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	Aug. 05, 2019	Sep. 30, 2019	Jul. 31, 2019	Jun. 30, 2019	Jan. 31, 2019	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Equity [Abstract]
Redeemable Noncontrolling Interest [Table Text Block]						The following table shows the changes in redeemable noncontrolling interest in equity of consolidated subsidiary during the three and nine months ended September 30, 2019 (in thousands): Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Redeemable noncontrolling interest, beginning of period $ 12,509 $ 8,531 Net income attributable to redeemable noncontrolling interest partner 863 2,528 Distributions of income to redeemable noncontrolling interest partner — (527 ) Accretion of redeemable noncontrolling interest (1,163 ) 1,677 Redeemable noncontrolling interest, end of period $ 12,209 $ 12,209
Class of Stock [Line Items]
Stock Repurchased During Period, Shares		63,417	144,584	39,320	7,862
Stock Repurchased During Period, Value		$ 0.6	$ 1.2	$ 0.3	$ 0.1
Common stock, shares authorized (in shares)		100,000,000				100,000,000	100,000,000
Common stock, par value (in dollars per share)		$ 0.01				$ 0.01	$ 0.01
Common Stock, Shares, Issued		50,879,949		50,879,949		50,879,949	50,719,884	50,719,884	50,719,884	50,598,901
Common stock, shares outstanding (in shares)		50,488,010				50,488,010	50,583,128
Preferred stock, shares authorized (in shares)		5,000,000				5,000,000	5,000,000
Preferred stock, par value (in dollars per share)		$ 0.01				$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)		0				0	0
Preferred stock, shares outstanding (in shares)		0				0	0
Stock Repurchase Program Expiration Date	Aug. 5, 2019
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 26.8				$ 26.8
GHO Homes [Member]
Class of Stock [Line Items]
Ownership percentage by noncontrolling owners		20.00%				20.00%

Stockholders' Equity (Schedule

Stockholders' Equity (Schedule of Changes in Redeemable Noncontrolling Interest) (Details) $ in Thousands	Sep. 30, 2019USD ($)
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance as of beginning of period	$ 8,531
Balance as of end of period	$ 12,209

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			59,116	39,228
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 544	$ 412
Stock options granted (in shares)			0
Share-based compensation expense	$ 200	$ 200	$ 2,035	$ 1,597
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	300		$ 300
Period for recognition			7 months 6 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 20		$ 20
Period for recognition			1 month 6 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%

Share-Based Compensation (Summa

Share-Based Compensation (Summary of Share-Based Awards Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Payment Arrangement [Abstract]
Share-based Payment Arrangement, Expense, Tax Benefit	$ 0	$ 0	$ 0.5	$ 0.4
Number of Shares
Nonvested, beginning of period (in shares)			34
Granted (in shares)			219
Vested (in shares)			(194)
Forfeited (in shares)			0
Nonvested, end of period (in shares)	59		59
Weighted Average Grant Date Fair Value per Share
Nonvested, beginning of period (in dollars per share)			$ 12
Granted (in dollars per share)			9.14
Vested (in dollars per share)			9.67
Forfeited (in dollars per share)			0
Nonvested, end of period (in dollars per share)	$ 9.05		$ 9.05

Share-Based Compensation (Sum_2

Share-Based Compensation (Summary of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)$ / sharesshares
Number of Shares
Options outstanding, beginning balance (in shares) | shares	500
Granted (in shares) | shares	0
Exercised (in shares) | shares	0
Forfeited (in shares) | shares	0
Options outstanding, ending balance (in shares) | shares	500
Options exercisable (in shares) | shares	400
Weighted Average Exercise Price per Share
Options outstanding, beginning balance (in dollars per share) | $ / shares	$ 7.49
Granted (in dollars per share) | $ / shares	0
Exercised (in dollars per share) | $ / shares	0
Forfeited (in dollars per share) | $ / shares	0
Options outstanding, ending balance (in dollars per share) | $ / shares	7.49
Options exercisable (in dollars per share) | $ / shares	$ 7.49
Options outstanding, weighted average remaining contractual term (in years)	5 years 29 days
Options exercisable, weighted average remaining contractual term (in years)	5 years 29 days
Options outstanding, aggregate intrinsic value | $	$ 1,605
Options exercisable, aggregate intrinsic value | $	$ 1,284

Share-Based Compensation (Sum_3

Share-Based Compensation (Summary of Unvested Stock Options Activity) (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2019$ / sharesshares
Number of Shares
Unvested, beginning balance (in shares) | shares	100
Granted (in shares) | shares	0
Vested (in shares) | shares	0
Forfeited (in shares) | shares	0
Unvested, ending balance (in shares) | shares	100
Weighted Average Grant Date Fair Value per Share
Unvested, beginning balance (in dollars per share) | $ / shares	$ 2.88
Granted (in dollars per share) | $ / shares	0
Vested (in dollars per share) | $ / shares	0
Forfeited (in dollars per share) | $ / shares	0
Unvested, ending balance (in dollars per share) | $ / shares	$ 2.88

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income tax expense	$ 5,833	$ 4,734	$ 14,993	$ 13,341

Related Party Transactions (Det

Related Party Transactions (Details)	3 Months Ended		9 Months Ended		43 Months Ended
	Sep. 30, 2019USD ($)board_seat	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)board_seat	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)board_seat	Mar. 31, 2016townhome
Related Party Transaction [Line Items]
Document Period End Date			Sep. 30, 2019
Operating Lease, Expense	$ 300,000		$ 900,000
Lots Remaining To Be Sold	0		0		0
Suwanee Station
Related Party Transaction [Line Items]
Board seats held | board_seat	2		2		2
Board seats available | board_seat	3		3		3
Centre Living
Related Party Transaction [Line Items]
Ownership percentage by parent	50.00%		50.00%		50.00%
Ownership percentage by noncontrolling owners	50.00%		50.00%		50.00%
Percentage of voting interest	51.00%		51.00%		51.00%
Investee | Suwanee Station
Related Party Transaction [Line Items]
Number of real estate properties | townhome						73
Payments of Capital Distribution	$ 0	$ 200,000	$ 900,000	$ 900,000	$ 3,300,000
Number of Lots Purchased	0	7	13	18
Lots Purchased, Cost	$ 0	$ 300,000	$ 500,000	$ 1,000,000
Investee | Suwanee Station | Green Brick Partners, Inc. [Member]
Related Party Transaction [Line Items]
Payments of Capital Distribution	0	$ 100,000	500,000	$ 400,000
Investee | Suwanee Station | Parent Company [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage						50.00%
Investee | Suwanee Station | Affiliated Entity
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage						50.00%
Affiliated Entity | Office Space Lease Agreements | Trophy Signature Homes [Member]
Related Party Transaction [Line Items]
Amounts due to affiliates	0		0		0
Affiliated Entity | Office Space Lease Agreements | GHO Homes [Member]
Related Party Transaction [Line Items]
Operating Lease, Expense			100,000
Amounts due to affiliates	0		0		0
Affiliated Entity | Title Closing Services | GHO Homes [Member]
Related Party Transaction [Line Items]
Amounts due to affiliates	$ 0		$ 0		$ 0

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Carrying Value and Estimated Fair Value of Financial Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Document Period End Date			Sep. 30, 2019
Contingent consideration	$ 2,110		$ 2,110		$ 2,207
Payment for Contingent Consideration Liability, Financing Activities			(514)	$ 0
Payment for Contingent Consideration Liability, Operating Activities			(1,332)	0
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	1,492	$ 0	1,749	$ 0
Debt Instrument, Fair Value Disclosure	$ 78,200		$ 78,200

Commitments and Contingencies

Commitments and Contingencies (Warranty activity) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Letters of Credit Outstanding, Amount	$ 3,300		$ 3,300		$ 2,200
Movement in Standard Product Warranty Accrual [Roll Forward]
Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties	169	$ 34	72	$ 17
Accrued Expenses
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty accrual, beginning of period	2,898	2,539	2,980	2,083
Warranties issued	930	532	2,351	1,645
Settlements	(639)	(455)	(2,045)	(1,095)
Warranty accrual, end of period	3,358	$ 2,650	3,358	$ 2,650
Performance Bonds
Product Warranty Liability [Line Items]
Amount of performance bonds outstanding	$ 5,200		$ 5,200		$ 5,300

Commitments and Contingencies_2

Commitments and Contingencies (Schedule of Annual Minimum Operating Lease Payments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Operating Lease, Liability	$ 3,837	$ 4,200	$ 0
Remainder of 2019	321
Operating Leases, Future Minimum Payments, Due in Two Years	1,320
Lessee, Operating Lease, Liability, Payments, Due Year Three	1,096
2021	819
Lessee, Operating Lease, Liability, Payments, Due Year Five	622
Total future lease payments	$ 4,178

Commitments and Contingencies_3

Commitments and Contingencies (Schedule of Expected Land and Lot Purchase Payments Under Option Agreements) (Details) $ in Thousands	Sep. 30, 2019USD ($)lot	Dec. 31, 2018lot
Commitments and Contingencies Disclosure [Abstract]
Lots under option | lot	2,855	1,843
Remainder of 2019	$ 52,978
2019	113,458
2020	49,861
2021	8,075
Total	$ 224,372

Commitments and Contingencies O

Commitments and Contingencies Operating Leases Disclosures - ASC 842 (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Earnest Money Deposits and Pre-acquisition Costs Written-Off	$ 0	$ 0.1	$ 0.5	$ 0.2
Short-term Lease, Cost	0.1		0.3
Operating Lease, Expense	0.3		0.9
Operating Lease, Payments	$ 0.3		$ 0.9
Operating Lease, Weighted Average Remaining Lease Term	3 years 6 months		3 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	5.22%		5.22%

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Entity Emerging Growth Company			false
Revenues:
Total revenues	$ 209,404	$ 152,052	$ 561,538	$ 438,527
Gross profit:
Gross Profit	44,725	36,668	120,372	110,373
Income before income taxes:
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	24,972	20,107	61,747	60,948
Inventory
Inventory	740,799		740,799		$ 668,961
Goodwill
Goodwill	680		680		$ 680
Builder operations
Revenues:
Total revenues	200,658	139,689
Gross profit:
Gross Profit	47,777	37,915	127,939	112,990
Income before income taxes:
Results of Operations, Income before Income Taxes	23,163	19,633	61,131	62,004
Builder operations | Southeast [Domain]
Revenues:
Total revenues	95,973	78,803	269,032	209,249
Gross profit:
Gross Profit	23,540	21,913	67,682	57,626
Income before income taxes:
Results of Operations, Income before Income Taxes	12,429	12,649	36,543	33,978
Goodwill
Goodwill	700		700
Builder operations | Central
Revenues:
Total revenues	104,685	60,886
Gross profit:
Gross Profit	24,237	16,002	60,257	55,364
Income before income taxes:
Results of Operations, Income before Income Taxes	10,734	6,984	24,588	28,026
Land development
Revenues:
Total revenues	8,746	12,363	24,228	27,054
Gross profit:
Gross Profit	2,300	2,142	6,202	6,591
Income before income taxes:
Results of Operations, Income before Income Taxes	4,067	1,292	8,366	4,975
Corporate and Other [Member]
Gross profit:
Other General Expense	(5,352)	(3,389)
Income before income taxes:
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(2,258)	(818)	(7,750)	(6,031)
Real Estate, Other [Member]
Revenues:
Total revenues	9,486	12,593	24,978	31,624
Real Estate, Other [Member] | Southeast [Domain]
Revenues:
Total revenues	740	230	750	4,570
Real Estate, Other [Member] | Central
Revenues:
Total revenues	8,746	12,363	24,228	27,054
Real Estate, Other [Member] | Builder operations
Revenues:
Total revenues	700	200	800	4,600
Residential Real Estate [Member]
Revenues:
Total revenues	199,918	139,459	536,560	406,903
Residential Real Estate [Member] | Southeast [Domain]
Revenues:
Total revenues	95,233	78,573	268,282	204,679
Residential Real Estate [Member] | Central
Revenues:
Total revenues	104,685	60,886	268,278	202,224
Residential Real Estate [Member] | Land development
Revenues:
Total revenues	$ 0	$ 0	$ 0	$ 0

Variable Interest Entities Vari

Variable Interest Entities Variable Interest Entities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Variable Interest Entity, Consolidated, Assets, Pledged [Abstract]
Variable Interest Entity Disclosure [Text Block]	3. VARIABLE INTEREST ENTITIES Our controlled builders’ creditors have no recourse against us. As of September 30, 2019 , 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 September 30, 2019 totaled $85.2 million , of which $0.6 million was cash and $75.3 million was inventory. The assets of our VIEs that could be used only to settle obligations of the VIEs as of December 31, 2018 totaled $76.3 million , of which $0.7 million was cash and $66.6 million was inventory. However, as we have voting control over these builders, it is ultimately within the control of Green Brick Partners, Inc. whether the assets of these VIEs are utilized to settle obligations of Green Brick Partners, Inc.
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Assets, Pledged	$ 85.2	$ 76.3
Cash [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Assets, Pledged	0.6	0.7
Inventories [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Assets, Pledged	$ 75.3	$ 66.6

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Millions	Oct. 17, 2019	Oct. 11, 2019	Sep. 30, 2019	Jul. 23, 2019
Subsequent Event [Line Items]
Letters of Credit Issued				$ 1.3
Line of Credit Facility, Remaining Borrowing Capacity			$ 71.8
Subsequent Event [Member]
Subsequent Event [Line Items]
Letters of Credit Issued		$ 5.7
Line of Credit Facility, Remaining Borrowing Capacity		$ 66.1
Contributions of LLC Members	$ 5
Equity Method Investment, Ownership Percentage	50.00%