Net Income Attributable to Green Brick Partners, Inc. Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income attributable to Green Brick Partners, Inc.	$ 61,577	$ 25,969
Preferred Stock Dividends, Income Statement Impact	(599)	0
Preferred Stock Dividends and Other Adjustments	(120)	0
Net Income (Loss) Available to Common Stockholders, Basic	$ 60,858	$ 25,969
Weighted-average number of shares outstanding —basic (in shares)	50,586	50,633
Basic net income attributable to Green Brick Partners, Inc. per share (in dollars per share)	$ 1.20	$ 0.51
Dilutive effect of stock options and restricted stock awards (in shares)	338	360
Weighted-average number of shares outstanding —diluted (in shares)	50,924	50,993
Diluted net income attributable to Green Brick Partners, Inc. per share (in dollars per share)	$ 1.20	$ 0.51