Net Income Attributable to Green Brick Partners, Inc. Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income attributable to Green Brick Partners, Inc.	$ 101,256	$ 52,263	$ 162,833	$ 78,232
Preferred Stock Dividends, Income Statement Impact	719	0	1,438	0
Net Income (Loss) Available to Common Stockholders, Basic	$ 100,537	$ 52,263	$ 161,395	$ 78,232
Weighted-average number of shares outstanding —basic (in shares)	48,046	50,701	49,309	50,667
Basic net income attributable to Green Brick Partners, Inc. per share (in dollars per share)	$ 2.09	$ 1.03	$ 3.27	$ 1.54
Dilutive effect of stock options and restricted stock awards (in shares)	338	363	330	362
Weighted-average number of shares outstanding —diluted (in shares)	48,384	51,064	49,639	51,029
Diluted net income attributable to Green Brick Partners, Inc. per share (in dollars per share)	$ 2.08	$ 1.02	$ 3.25	$ 1.53