Statement of Shareholders' Equity (Statement) - USD ($) $ in Thousands	Total	Additional Paid-in Capital [Member]	Common Stock [Member]	Retained Earnings	Noncontrolling Interest	Treasury Stock, Common	Parent
Common stock, shares issued (in shares)	51,151,911
Common stock, $0.01 par value: 100,000,000 shares authorized; 45,378,364 issued and outstanding as of September 30, 2023 and 46,032,930 issued and outstanding as of December 31, 2022, respectively	$ 512
Preferred stock, $0.01 par value: 5,000,000 shares authorized; 2,000 issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	$ 47,696
Preferred stock, shares outstanding (in shares)	2,000
Treasury Stock, Common, Shares	391,939
Treasury Stock, Value	$ 3,167
Additional paid-in capital	289,641
Retained Earnings (Accumulated Deficit)	539,866
Stockholders' Equity Attributable to Parent	874,548
Stockholders' Equity Attributable to Noncontrolling Interest	14,146
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 888,694
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	168,651
APIC, Share-based Payment Arrangement, Increase for Cost Recognition							$ 664
Dividends	$ (2,092)			$ (2,092)			(2,092)
Stock Repurchased During Period, Value	101,463						101,463
Net income attributable to Green Brick Partners, Inc.	236,353			236,353			236,353
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					$ 13,135
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	249,488
Temporary Equity, Accretion to Redemption Value, Adjustment	(448)	$ (448)					(448)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 2,753	2,751	$ 2				2,753
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	46,415
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ 1,075	(1,074)	$ (1)				1,075
Stock Repurchased During Period, Shares	4,844,559
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	$ 5,718				5,718
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	$ 664	664
Common stock, shares issued (in shares)	51,275,158
Common stock, $0.01 par value: 100,000,000 shares authorized; 45,378,364 issued and outstanding as of September 30, 2023 and 46,032,930 issued and outstanding as of December 31, 2022, respectively	$ 513
Preferred stock, $0.01 par value: 5,000,000 shares authorized; 2,000 issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	$ 47,696
Preferred stock, shares outstanding (in shares)	2,000
Treasury Stock, Common, Shares	4,804,152
Treasury Stock, Value	$ 95,479
Additional paid-in capital	293,336
Retained Earnings (Accumulated Deficit)	701,325
Stockholders' Equity Attributable to Parent	947,391
Stockholders' Equity Attributable to Noncontrolling Interest	16,104
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	963,495
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			(1,011)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	204	204					204
Dividends	(718)						(718)
Stock Repurchased During Period, Value	9,151					$ 9,151	9,151
Stock Repurchased and Retired During Period, Shares			(5,236,498)			5,236,498
Treasury Stock, Retired, Cost Method, Amount	0	(29,964)	$ (53)	(74,613)		$ (104,630)	0
Noncontrolling Interest, Change in Redemption Value	2,005
Net income attributable to Green Brick Partners, Inc.	73,520			73,520			73,520
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					5,459
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	78,979
Temporary Equity, Accretion to Redemption Value, Adjustment	(2,005)	(2,005)					(2,005)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ (1)	(1)	$ 0				(1)
Stock Repurchased During Period, Shares						432,346
Common stock, shares issued (in shares)	46,037,649
Common stock, $0.01 par value: 100,000,000 shares authorized; 45,378,364 issued and outstanding as of September 30, 2023 and 46,032,930 issued and outstanding as of December 31, 2022, respectively	$ 460
Preferred stock, $0.01 par value: 5,000,000 shares authorized; 2,000 issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	$ 47,696
Preferred stock, shares outstanding (in shares)	2,000
Preferred Stock, Value, Outstanding	$ 47,696
Treasury Stock, Common, Shares	0
Treasury Stock, Value	$ 0
Additional paid-in capital	261,570
Retained Earnings (Accumulated Deficit)	699,514
Stockholders' Equity Attributable to Parent	1,009,240
Stockholders' Equity Attributable to Noncontrolling Interest	21,563
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,030,803
Common stock, shares issued (in shares)	46,032,930
Common stock, $0.01 par value: 100,000,000 shares authorized; 45,378,364 issued and outstanding as of September 30, 2023 and 46,032,930 issued and outstanding as of December 31, 2022, respectively	$ 460
Preferred stock, $0.01 par value: 5,000,000 shares authorized; 2,000 issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	$ 47,696
Preferred stock, shares outstanding (in shares)	2,000
Treasury Stock, Common, Shares	0
Treasury Stock, Value	$ 0
Additional paid-in capital	259,410
Retained Earnings (Accumulated Deficit)	754,341
Stockholders' Equity Attributable to Parent	1,061,907
Stockholders' Equity Attributable to Noncontrolling Interest	20,908
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,082,815
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			208,882
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,393	1,393					1,393
Dividends	(2,156)			(2,156)			(2,156)
Stock Repurchased During Period, Value	27,991					$ 27,991	27,991
Stock Repurchased and Retired During Period, Shares			(803,591)			(803,591)
Treasury Stock, Retired, Cost Method, Amount		(4,592)		(23,391)		$ (27,991)
Noncontrolling Interest, Change in Redemption Value	(2,706)	(2,706)					(2,706)
Net income attributable to Green Brick Partners, Inc.	211,606			211,606			211,606
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					9,579
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	221,185
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	5,232	5,230	$ 2				5,232
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			59,857
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	1,976	1,976	$ 0				1,976
Stock Repurchased During Period, Shares						803,591
Stock Repurchased and Retired During Period, Value			$ (8)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	$ 14,056				14,056
Common stock, shares issued (in shares)	45,378,678
Common stock, $0.01 par value: 100,000,000 shares authorized; 45,378,364 issued and outstanding as of September 30, 2023 and 46,032,930 issued and outstanding as of December 31, 2022, respectively	$ 454
Preferred stock, $0.01 par value: 5,000,000 shares authorized; 2,000 issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	$ 47,696
Preferred stock, shares outstanding (in shares)	2,000
Additional paid-in capital	$ 256,965
Retained Earnings (Accumulated Deficit)	868,962
Stockholders' Equity Attributable to Parent	1,174,077
Stockholders' Equity Attributable to Noncontrolling Interest	16,148
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,190,225
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			314
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	363	363					363
Dividends	(718)			(718)			(718)
Stock Repurchased During Period, Value	0						0
Stock Repurchased and Retired During Period, Shares			0
Treasury Stock, Retired, Cost Method, Amount	0	0	$ 0	0			0
Noncontrolling Interest, Change in Redemption Value	(569)	$ (569)					(569)
Net income attributable to Green Brick Partners, Inc.	72,156			$ 72,156			$ 72,156
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					$ 3,283
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	$ 75,439
Common stock, shares issued (in shares)	45,378,364
Common stock, $0.01 par value: 100,000,000 shares authorized; 45,378,364 issued and outstanding as of September 30, 2023 and 46,032,930 issued and outstanding as of December 31, 2022, respectively	$ 454
Preferred stock, $0.01 par value: 5,000,000 shares authorized; 2,000 issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	$ 47,603
Preferred stock, shares outstanding (in shares)	2,000
Preferred Stock, Value, Outstanding	$ 47,603
Treasury Stock, Common, Shares	0
Treasury Stock, Value	$ 0
Additional paid-in capital	256,759
Retained Earnings (Accumulated Deficit)	940,400
Stockholders' Equity Attributable to Parent	1,245,216
Stockholders' Equity Attributable to Noncontrolling Interest	16,431
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,261,647