Related Party Transactions	12 Months Ended
Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS During 2017, 2016 and 2015, the Company had related party transactions through the normal course of business. These transactions include the following: On October 27, 2014, in connection with the Transaction, the Company entered into the Loan Agreement, a guaranty and a pledge and security agreement with certain funds and accounts managed by Greenlight, our largest shareholder. Greenlight beneficially owns approximately 47.7% of the voting power of the Company. The Loan Agreement provides for a five year term loan facility in an aggregate principal amount of $150.0 million which funded part of the Transaction. Certain subsidiaries of the Company guarantee obligations under the Term Loan Facility. The Term Loan Facility bore interest at 9.0% per annum, payable quarterly, from October 27, 2014 through the first anniversary thereof and 10.0% per annum thereafter. On July 1, 2015, we used approximately $154.9 million of the net proceeds from the Equity Offering to repay all of the outstanding principal, interest and a prepayment premium under the Term Loan Facility. In 2012, we formed Centre Living Homes, LLC (“Centre Living”), a builder that focuses on a limited number of homes and luxury townhomes each year in the Dallas, Texas market. Trevor Brickman, the son of Green Brick’s Chief Executive Officer, is the President of Centre Living. Effective as of January 1, 2015, Centre Living’s operating agreement was amended and restated to the same general terms as with our other builders, such that Green Brick’s ownership interest in Centre Living is 50% and Trevor Brickman’s ownership interest is 50% for future operations beginning January 1, 2015. Subsequent to this amendment, Green Brick has 51% voting control over the operations of Centre Living. As such, 100% of Centre Living’s operations are included within our consolidated financial statements for the years ended December 31, 2017, December 31, 2016 and December 31, 2015. The noncontrolling interest attributable to Centre Living was $0.1 million and $0.3 million as of December 31, 2017 and December 31, 2016, respectively. In June 2016, the Company sold one developed lot to Trevor Brickman for $0.4 million, of which $0.3 million was included in the cost of land and lots. In September 2016, Trevor Brickman entered into an agreement with Centre Living to construct a home on the developed lot. In accordance with the Company’s employee discount policy, the contract price resulted in a margin of approximately 13%. The home was completed in 2017 and the Company incurred $0.6 million in costs to construct the home. As of December 31, 2017 and December 31, 2016, the Company had $0 and $0.1 million, respectively, in accounts receivable due from Trevor Brickman related to the construction of the home. 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 agreement in place, the Company purchased $0.3 million in lots during the year ended December 31, 2016. The Company purchased $1.0 million in lots during the six months ended June 30, 2017. The Company purchased all 19 lots as of June 30, 2017. In November 2015, the Company purchased 12 lots from an entity affiliated with the president of TPG. The lots are part of a 92-unit townhome community, Glens at Sugarloaf in Atlanta. No deposits were paid by the Company in contracting for the lots. The total paid for the lots in 2015 was $1.0 million. During March 2016, the Company purchased the remaining 80 townhome lots within the community at a price of $4.8 million from the affiliated entity. During March 2016, the Company purchased undeveloped land for an eventual 83 lot community, Academy Street in Atlanta. Simultaneously, the Company entered into a partnership agreement with an entity affiliated with the president of TPG to develop the community for sale of the lots to TPG under GRBK Academy LLC. Contributions and profits are 80% for the Company and 20% for the affiliated entity. The total contributions paid in 2016 were $11.2 million, of which $9.0 million was paid by the Company. The total contributions paid during the year ended December 31, 2017 were $0.5 million, of which $0.4 million was paid by the Company. The Company has 80% ownership in GRBK Academy, LLC and has consolidated the entity’s results of operations and financial condition into its financial statements. During March 2016, the Company purchased undeveloped land for an eventual 73 unit townhome community, Suwanee Station in Atlanta. Simultaneously, the Company entered into a partnership agreement with an entity affiliated with the president of TPG to develop the community for sale of the lots to TPG under GRBK Suwanee Station LLC. Contributions and profits are 50% for the Company and 50% for the affiliated entity. Total capital contributions are estimated at $3.4 million, of which 50% will be contributed by the Company. The total contributions paid in 2016 were $1.8 million, of which $0.9 million was paid by the Company. The total contributions paid during the year ended December 31, 2017 were $0.7 million, of which $0.4 million was paid by the Company. The Company holds two of the three board seats and is able to exercise control over the operations of GRBK Suwanee Station LLC and therefore has consolidated the entity’s results of operations and financial condition into its financial statements. In June 2016, the Company purchased 14 lots from an entity affiliated with the president of TPG. The lots are part of a 40-unit townhome community, Dunwoody Towneship. No deposits were paid by the Company related to these lots. The 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. In February 2017, Richard A. Costello paid a $110,000 deposit to Centre Living for the purchase of a townhome. During the fourth quarter of 2017, Mr. Costello closed on the townhome for approximately $495,000. In accordance with the Company’s employee discount policy, the contract price resulted in a margin of approximately 13%. In February 2017, Jed Dolson paid a $110,000 deposit to Centre Living for the purchase of a townhome. During the fourth quarter of 2017, as allowed for in the Company’s employee discount policy, Mr. Dolson assigned his rights to purchase the townhome to his sister-in-law. The townhome was sold in the fourth quarter of 2017 for approximately $472,000. In accordance with the Company’s employee discount policy, the contract price resulted in a margin of approximately 13%.

RELATED PARTY TRANSACTIONS

During 2017, 2016 and 2015, the Company had related party transactions through the normal course of business. These transactions include the following:

On October 27, 2014, in connection with the Transaction, the Company entered into the Loan Agreement, a guaranty and a pledge and security agreement with certain funds and accounts managed by Greenlight, our largest shareholder. Greenlight beneficially owns approximately 47.7% of the voting power of the Company. The Loan Agreement provides for a five year term loan facility in an aggregate principal amount of $150.0 million which funded part of the Transaction. Certain subsidiaries of the Company guarantee obligations under the Term Loan Facility. The Term Loan Facility bore interest at 9.0% per annum, payable quarterly, from October 27, 2014 through the first anniversary thereof and 10.0% per annum thereafter. On July 1, 2015, we used approximately $154.9 million of the net proceeds from the Equity Offering to repay all of the outstanding principal, interest and a prepayment premium under the Term Loan Facility.

In 2012, we formed Centre Living Homes, LLC (“Centre Living”), a builder that focuses on a limited number of homes and luxury townhomes each year in the Dallas, Texas market. Trevor Brickman, the son of Green Brick’s Chief Executive Officer, is the President of Centre Living. Effective as of January 1, 2015, Centre Living’s operating agreement was amended and restated to the same general terms as with our other builders, such that Green Brick’s ownership interest in Centre Living is 50% and Trevor Brickman’s ownership interest is 50% for future operations beginning January 1, 2015. Subsequent to this amendment, Green Brick has 51% voting control over the operations of Centre Living. As such, 100% of Centre Living’s operations are included within our consolidated financial statements for the years ended December 31, 2017, December 31, 2016 and December 31, 2015. The noncontrolling interest attributable to Centre Living was $0.1 million and $0.3 million as of December 31, 2017 and December 31, 2016, respectively. In June 2016, the Company sold one developed lot to Trevor Brickman for $0.4 million, of which $0.3 million was included in the cost of land and lots. In September 2016, Trevor Brickman entered into an agreement with Centre Living to construct a home on the developed lot. In accordance with the Company’s employee discount policy, the contract price resulted in a margin of approximately 13%. The home was completed in 2017 and the Company incurred $0.6 million in costs to construct the home. As of December 31, 2017 and December 31, 2016, the Company had $0 and $0.1 million, respectively, in accounts receivable due from Trevor Brickman related to the construction of the home.

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 agreement in place, the Company purchased $0.3 million in lots during the year ended December 31, 2016. The Company purchased $1.0 million in lots during the six months ended June 30, 2017. The Company purchased all 19 lots as of June 30, 2017.

In November 2015, the Company purchased 12 lots from an entity affiliated with the president of TPG. The lots are part of a 92-unit townhome community, Glens at Sugarloaf in Atlanta. No deposits were paid by the Company in contracting for the lots. The total paid for the lots in 2015 was $1.0 million. During March 2016, the Company purchased the remaining 80 townhome lots within the community at a price of $4.8 million from the affiliated entity.

During March 2016, the Company purchased undeveloped land for an eventual 83 lot community, Academy Street in Atlanta. Simultaneously, the Company entered into a partnership agreement with an entity affiliated with the president of TPG to develop the community for sale of the lots to TPG under GRBK Academy LLC. Contributions and profits are 80% for the Company and 20% for the affiliated entity. The total contributions paid in 2016 were $11.2 million, of which $9.0 million was paid by the Company. The total contributions paid during the year ended December 31, 2017 were $0.5 million, of which $0.4 million was paid by the Company. The Company has 80% ownership in GRBK Academy, LLC and has consolidated the entity’s results of operations and financial condition into its financial statements.

During March 2016, the Company purchased undeveloped land for an eventual 73 unit townhome community, Suwanee Station in Atlanta. Simultaneously, the Company entered into a partnership agreement with an entity affiliated with the president of TPG to develop the community for sale of the lots to TPG under GRBK Suwanee Station LLC. Contributions and profits are 50% for the Company and 50% for the affiliated entity. Total capital contributions are estimated at $3.4 million, of which 50% will be contributed by the Company. The total contributions paid in 2016 were $1.8 million, of which $0.9 million was paid by the Company. The total contributions paid during the year ended December 31, 2017 were $0.7 million, of which $0.4 million was paid by the Company. The Company holds two of the three board seats and is able to exercise control over the operations of GRBK Suwanee Station LLC and therefore has consolidated the entity’s results of operations and financial condition into its financial statements.

In June 2016, the Company purchased 14 lots from an entity affiliated with the president of TPG. The lots are part of a 40-unit townhome community, Dunwoody Towneship. No deposits were paid by the Company related to these lots. The 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.

In February 2017, Richard A. Costello paid a $110,000 deposit to Centre Living for the purchase of a townhome. During the fourth quarter of 2017, Mr. Costello closed on the townhome for approximately $495,000. In accordance with the Company’s employee discount policy, the contract price resulted in a margin of approximately 13%.

In February 2017, Jed Dolson paid a $110,000 deposit to Centre Living for the purchase of a townhome. During the fourth quarter of 2017, as allowed for in the Company’s employee discount policy, Mr. Dolson assigned his rights to purchase the townhome to his sister-in-law. The townhome was sold in the fourth quarter of 2017 for approximately $472,000. In accordance with the Company’s employee discount policy, the contract price resulted in a margin of approximately 13%.