Net Income Attributable to Green Brick Partners, Inc. Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income attributable to Green Brick Partners, Inc.	$ 73,520	$ 48,507	$ 236,353	$ 126,739
Preferred Stock Dividends, Income Statement Impact	719	0	2,156	0
Net Income (Loss) Available to Common Stockholders, Basic	$ 72,801	$ 48,507	$ 234,197	$ 126,739
Weighted-average number of shares outstanding —basic (in shares)	46,032	50,732	48,205	50,689
Basic net income attributable to Green Brick Partners, Inc. per share (in dollars per share)	$ 1.58	$ 0.96	$ 4.86	$ 2.50
Dilutive effect of stock options and restricted stock awards (in shares)	358	347	339	357
Weighted-average number of shares outstanding —diluted (in shares)	46,390	51,079	48,544	51,046
Diluted net income attributable to Green Brick Partners, Inc. per share (in dollars per share)	$ 1.57	$ 0.95	$ 4.82	$ 2.48