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