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Related Party Transactions (Details) |  | 1 Months Ended | 3 Months Ended | 8 Months Ended | 12 Months Ended | 24 Months Ended |
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Jun. 10, 2016 USD ($) townhome | Feb. 28, 2017 USD ($) | Jun. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2017 USD ($) board_seat Lots | Dec. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) Lots townhome | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) board_seat Lots | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2019 USD ($) Lots townhome | Aug. 08, 2019
Related Party Transactions [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  | RELATED PARTY TRANSACTIONS During 2019, 2018 and 2017, the Company had the following related party transactions through the normal course of business. The Parc at Cogburn In September 2015, the Company purchased 11 lots from an entity affiliated with the president of TPG, one of its controlled builders. The lots are part of a 19-home community, The Parc at Cogburn in Atlanta. The total paid for the lots in 2015 was $1.8 million. Under the option contract in place, the Company purchased $0.3 million in lots during the year ended December 31, 2016, and $1.0 million in lots during the year ended December 31, 2017. The Company purchased all 19 lots as of December 31, 2017. Academy Street In March 2016, the Company purchased undeveloped land for an 83-lot community, Academy Street in Atlanta. Simultaneously, the Company entered into a partnership agreement with an entity affiliated with the president of TPG to develop the land for sale of the lots to TPG. Contributions and profits are shared 80% by the Company and 20% by the affiliated entity. During the year ended December 31, 2017, TPG purchased 62 lots within the community for $11.2 million. During the year ended December 31, 2018, TPG purchased the remaining 21 lots within the community for $2.9 million. Total capital contributions as of December 31, 2019 were $11.7 million. Total capital contributions paid during the year ended December 31, 2016 were $11.2 million, of which $9.0 million was paid by the Company. Total capital contributions paid during the year ended December 31, 2017 were $0.5 million, of which $0.4 million was paid by the Company. There were no capital contributions made to the partnership during the years ended December 31, 2019 and 2018. Total capital distributions as of December 31, 2019 were $14.8 million. There were no capital distributions from the partnership during the year ended December 31, 2016. Total capital distributions from the partnership during the year ended December 31, 2017 were $11.5 million, of which $9.2 million was paid to the Company. Total capital distributions from the partnership during the year ended December 31, 2018 were $3.3 million, of which $2.7 million was paid to the Company. The capital distributions made during the year ended December 31, 2018 were final, and the affiliated entity has ceased its activity. The Company has consolidated the entity’s results of operations and financial condition into its consolidated financial statements based on its 80% ownership. 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 TPG to develop the land for sale of the lots to TPG. Contributions and profits are shared 50% by the Company and 50% by the affiliated entity. During the years ended December 31, 2019, 2018 and 2017, TPG purchased 13, 25, and 27 lots within the community for $0.5 million, $1.3 million and $1.6 million, respectively. As of December 31, 2019, there were no lots remaining to be sold to TPG. Total capital contributions as of December 31, 2019 were $2.5 million. Total capital contributions paid during the year ended December 31, 2016 were $1.8 million, of which $0.9 million was paid by the Company. The capital contributions paid during the year ended December 31, 2017 were $0.7 million, of which $0.4 million was paid by the Company. The were no capital contributions paid during the year ended December 31, 2019 and 2018. Total capital distributions as of December 31, 2019 were $3.3 million. There were no capital distributions from the partnership during the year ended December 31, 2016. Total capital distributions from the partnership during the year ended December 31, 2017 were $1.5 million, of which $0.7 million was paid to the Company. Total capital distributions from the partnership during the year ended December 31, 2018 were $0.9 million, of which $0.4 million was paid to the Company. Total capital distributions from the partnership during the year ended December 31, 2019 were $0.9 million, of which $0.5 million was paid to the Company. The capital distributions made during the year ended December 31, 2019 were final, 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 consolidated financial statements. Dunwoody Towneship In June 2016, the Company purchased 14 lots from an entity affiliated with the president of TPG. The lots are part of a 40-unit townhome community, Dunwoody Towneship in Atlanta. The total paid for the 14 lots in 2016 was $1.8 million. The Company purchased the remaining 26 lots during the year ended December 31, 2017 for $3.3 million. Corporate Officers In February 2017, Richard A. Costello paid a $0.1 million deposit to Centre Living Homes, LLC, one of the Company’s builders, on a townhome. During the fourth quarter of 2017, Mr. Costello closed on the townhome for approximately $0.5 million. In accordance with the Company’s employee discount policy, the contract price resulted in a margin of approximately 13%. In February 2017, Jed Dolson paid a $0.1 million deposit to Centre Living on a townhome. During the fourth quarter of 2017, as allowed for in the Company’s employee discount policy, Mr. Dolson assigned his rights to purchase the townhome to his sister-in-law. The townhome was closed on in the fourth quarter of 2017 for approximately $0.5 million. In accordance with the Company’s employee discount policy, the contract price resulted in a margin of approximately 13%. Trevor Brickman, the son of Green Brick’s Chief Executive Officer, is the President of Centre Living. Following a series of transactions described in Part I, Item 1 of this Annual Report on Form 10-K and in Note 3, effective December 31, 2019, Green Brick’s ownership interest in Centre Living is 90% and Trevor Brickman’s ownership interest is 10%. Green Brick has 90% voting control over the operations of Centre Living. As such, 100% of Centre Living’s operations are included within our consolidated financial statements. GRBK GHO GRBK GHO leases office space from entities affiliated with the president of GRBK GHO. During the year ended December 31, 2019 and during the period from April 26, 2018 through December 31, 2018, GRBK GHO incurred a lease cost of $0.1 million and $0.1 million, respectively, under such lease agreements. As of December 31, 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 year ended December 31, 2019 and during the period from April 26, 2018 through December 31, 2018, GRBK GHO incurred de minimus fees related to such title closing services. As of December 31, 2019, no amounts were due to the title company affiliate. |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Document Period End Date |  |  |  |  |  |  | Dec. 31, 2019 |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest |  |  |  |  | $ 16,691,000 | $ 17,281,000 | $ 13,227,000 | $ 17,281,000 | $ 16,691,000 | $ 16,913,000 |  | $ 13,227,000 |
Stated interest rate |  |  |  |  |  |  |  |  |  |  |  |  | 4.00%
The Parc at Cogburn [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of townhomes in community |  |  |  |  | 19 |  | 19 |  | 19 |  |  | 19 |
Number of Lots Purchased |  |  |  | 11 |  |  |  |  |  |  |  |  |
Payments to acquire residential real estate |  |  |  |  |  |  |  |  | $ 1,000,000.0 | 300,000 | $ 1,800,000 |  |
Suwanee Station [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
BoardSeatsAvailable | board_seat |  |  |  |  | 3 |  |  |  | 3 |  |  |  |
CapitalContributionsMade |  |  |  |  |  |  |  | $ 700,000 | $ 1,800,000 |  |  |  |
BoardSeatsHeld | board_seat |  |  |  |  | 2 |  |  |  | 2 |  |  |  |
Number of townhomes in community |  |  |  |  |  |  | 73 |  |  |  |  | 73 |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  | 50.00% |  |  |  |  | 50.00% |
Number of Lots Purchased |  |  |  |  |  |  | 13 | 25 | 27 |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  | 50.00% |  |  |  |  | 50.00% |
Total Capital Distributions |  |  |  |  |  |  | $ 3,300,000 |  |  |  |  | $ 3,300,000 |
Total Capital Contributions |  |  |  |  |  |  | 2,500,000 |  |  |  |  | 2,500,000 |
Payments to acquire residential real estate |  |  |  |  |  |  | 500,000 | $ 1,300,000 | $ 1,600,000 |  |  |  |
Proceeds from Distributions Received from Real Estate Partnerships |  |  |  |  |  |  | 500,000 | 400,000 | 700,000 |  |  |  |
Capital Distributions Made |  |  |  |  |  |  | $ 900,000 | $ 900,000 | $ 1,500,000 |  |  |  |
Centre Living [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  | 90.00% |  |  |  | 90.00% |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  | 10.00% |  |  |  | 10.00% |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  | 90.00% |  |  |  | 90.00% |  |  |  |
Dunwoody Towneship [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of townhomes in community | townhome | 40 |  |  |  |  |  |  |  |  |  |  |  |
Number of Lots Purchased |  |  | 14 |  |  |  |  |  |  |  |  |  |
Number of lots purchased | Lots |  |  |  |  | 26 |  |  |  | 26 |  |  |  |
Payments to acquire residential real estate | $ 1,800,000 |  |  |  |  |  |  |  | $ 3,300,000 |  |  |  |
Academy Street [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
CapitalContributionsMade |  |  |  |  |  |  |  |  | $ 500,000 | 11,200,000 |  | $ 0 |
Number of townhomes in community | Lots |  |  |  |  |  |  | 83 |  |  |  |  | 83 |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  | 80.00% |  |  |  |  | 80.00% |
Number of Lots Purchased |  |  |  |  |  |  |  | 21 | 62 |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  | 20.00% |  |  |  |  | 20.00% |
Total Capital Distributions |  |  |  |  |  |  | $ 14,800,000 |  |  |  |  | $ 14,800,000 |
Total Capital Contributions |  |  |  |  |  |  | 11,700,000 |  |  |  |  | 11,700,000 |
Payments to acquire residential real estate |  |  |  |  |  |  |  | $ 2,900,000 | $ 11,200,000 |  |  |  |
Proceeds from Distributions Received from Real Estate Partnerships |  |  |  |  |  |  |  | 2,700,000 | 9,200,000 |  |  |  |
Capital Distributions Made |  |  |  |  |  |  |  | $ 3,300,000 | 11,500,000 | 0 |  |  |
townhome [Member] | Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gross Margin, Percentage |  | 13.00% |  |  |  |  |  |  |  |  |  |  |
Green Brick Partners, Inc. [Member] | Suwanee Station [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
CapitalContributionsMade |  |  |  |  |  |  |  |  | 400,000 | 900,000 |  |  |
Green Brick Partners, Inc. [Member] | Academy Street [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
CapitalContributionsMade |  |  |  |  |  |  |  |  | $ 400,000 | $ 9,000,000.0 |  |  |
Richard A. Costello [Member] | Centre Living [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Real Estate |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |
Related Party Deposit Liabilities |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |
Jed Dolson [Member] | Centre Living [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Real Estate |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |
Related Party Deposit Liabilities |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |
GHO Homes [Member] | Office Space Lease Agreements [Member] | Affiliated Entity [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lease, Cost |  |  |  |  |  | $ 100,000 | 100,000 |  |  |  |  |  |
Due to Related Parties |  |  |  |  |  |  | $ 0 |  |  |  |  | $ 0 |

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