Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Sale of residential units	$ 143,878	$ 100,345	$ 264,244	$ 193,742
Sale of land and lots	11,132	4,606	19,031	10,546
Total revenues	155,010	104,951	283,275	204,288
Cost of residential units	112,316	78,553	206,825	152,314
Cost of land and lots	8,076	3,472	14,702	7,762
Total cost of sales	120,392	82,025	221,527	160,076
Total gross profit	34,618	22,926	61,748	44,212
Salary expense	6,737	5,332	13,675	10,767
Selling, general and administrative expense	7,280	4,167	13,105	8,445
Operating profit	20,601	13,427	34,968	25,000
Equity in income of unconsolidated entities	2,279	0	3,815	0
Other income, net	1,350	386	2,058	928
Income before taxes	24,230	13,813	40,841	25,928
Income tax provision	5,235	4,382	8,607	8,271
Net income	18,995	9,431	32,234	17,657
Less: Net income attributable to noncontrolling interests	4,126	1,742	6,162	3,771
Net income attributable to Green Brick Partners, Inc.	$ 14,869	$ 7,689	$ 26,072	$ 13,886
Net income attributable to Green Brick Partners, Inc. per common share:
Basic (in dollars per share)	$ 0.29	$ 0.16	$ 0.52	$ 0.28
Diluted (in dollars per share)	$ 0.29	$ 0.16	$ 0.51	$ 0.28
Weighted average common shares used in the calculation of net income attributable to Green Brick Partners, Inc. per common share:
Basic (in shares)	50,664	49,047	50,620	49,003
Diluted (in shares)	50,783	49,123	50,751	49,070