Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands

12 Months Ended

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

EARNINGS PER SHARE

The Company’s restricted stock awards have the right to receive forfeitable dividends on an equal basis with common stock and therefore are not considered participating securities that must be included in the calculation of net income per share using the two-class method. Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding during each period, adjusted for non-vested shares of restricted stock awards during each period. Diluted earnings per share is calculated using the treasury stock method and includes the effect of all dilutive securities, including stock options and restricted stock awards.

The computation of basic and diluted net income attributable to Green Brick Partners, Inc. per share is as follows (in thousands, except per share amounts):

	Years Ended December 31,
	2019		2018		2017
Net income attributable to Green Brick Partners, Inc.	$	58,656	$	51,623	$	14,970
Weighted-average number of shares outstanding - basic	50,530		50,652		49,597
Basic net income attributable to Green Brick Partners, Inc. per share	$	1.16	$	1.02	$	0.30
Weighted-average number of shares outstanding - basic	50,530		50,652		49,597
Dilutive effect of stock options and restricted stock awards	106		99		86
Weighted-average number of shares outstanding - diluted	50,636		50,751		49,683
Diluted net income attributable to Green Brick Partners, Inc. per share	$	1.16	$	1.02	$	0.30

The following shares that could potentially dilute earnings per share in the future are not included in the determination of diluted net income attributable to Green Brick Partners, Inc. per common share (in thousands):

	Years Ended December 31,
	2019	2018	2017
Antidilutive options to purchase common stock and restricted stock awards	14	8	—

Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount

14

8

0

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

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):

	Years Ended December 31,
	2019		2018		2017
Net income attributable to Green Brick Partners, Inc.	$	58,656	$	51,623	$	14,970
Weighted-average number of shares outstanding - basic	50,530		50,652		49,597
Basic net income attributable to Green Brick Partners, Inc. per share	$	1.16	$	1.02	$	0.30
Weighted-average number of shares outstanding - basic	50,530		50,652		49,597
Dilutive effect of stock options and restricted stock awards	106		99		86
Weighted-average number of shares outstanding - diluted	50,636		50,751		49,683
Diluted net income attributable to Green Brick Partners, Inc. per share	$	1.16	$	1.02	$	0.30

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The following shares that could potentially dilute earnings per share in the future are not included in the determination of diluted net income attributable to Green Brick Partners, Inc. per common share (in thousands):

	Years Ended December 31,
	2019	2018	2017
Antidilutive options to purchase common stock and restricted stock awards	14	8	—

Net Income (Loss) Attributable to Parent

$ 58,656

$ 51,623

$ 14,970

Weighted Average Number Diluted Shares Outstanding Adjustment

106

99

86

Weighted Average Number of Shares Outstanding, Basic

50,530

50,652

49,597

Earnings Per Share, Basic

$ 1.16

$ 1.02

$ 0.30

Weighted Average Number of Shares Outstanding, Diluted

50,636

50,751

49,683

Earnings Per Share, Diluted

$ 1.16

$ 1.02

$ 0.30