Statement of Shareholders' Equity (Statement) - USD ($)	Total	Additional Paid-in Capital [Member]	Common Stock [Member]	Retained Earnings	Noncontrolling Interest
Statement of Stockholders' Equity [Abstract]
Additional Paid in Capital	$ 293,242,000
Treasury Stock, Value	$ 3,167,000
Treasury Stock, Common, Shares	391,939
Common Stock, Shares, Issued	51,053,858
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 511,000
Treasury Stock, Value	$ 3,167,000
Common Stock, Shares, Issued	51,053,858
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 511,000
Treasury Stock, Common, Shares	391,939
Additional Paid in Capital	$ 293,242,000
Retained Earnings (Accumulated Deficit)	349,656,000
Stockholders' Equity Attributable to Parent	640,242,000
Stockholders' Equity Attributable to Noncontrolling Interest	9,167,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 649,409,000
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	139,371
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 2,437,000	$ 2,436,000	$ 1,000
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ 834,000	(833,000)	(1,000)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	41,318
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 319,000
Temporary Equity, Accretion to Redemption Value, Adjustment		(3,007,000)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	1,606,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					$ 6,741,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	84,973,000
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	319,000
Temporary Equity, Accretion to Redemption Value, Adjustment		(3,007,000)
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	834,000	(833,000)	(1,000)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 2,437,000	2,436,000	1,000
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	139,371
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	41,318
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 319,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	1,606,000
Net income attributable to Green Brick Partners, Inc.	78,232,000			$ 78,232,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					6,741,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	84,973,000
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	319,000
Payment for Contingent Consideration Liability, Operating Activities	368,000
Additional Paid in Capital	293,162,000
Treasury Stock, Value	$ 3,167,000
Treasury Stock, Common, Shares	391,939
Common Stock, Shares, Issued	51,124,215
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 511,000
Treasury Stock, Value	$ 3,167,000
Common Stock, Shares, Issued	51,124,215
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 511,000
Treasury Stock, Common, Shares	391,939
Additional Paid in Capital	$ 293,162,000
Retained Earnings (Accumulated Deficit)	375,625,000
Stockholders' Equity Attributable to Parent	666,131,000
Stockholders' Equity Attributable to Noncontrolling Interest	10,630,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 676,761,000
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	27,696
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 0		0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	173,000	173,000
Temporary Equity, Accretion to Redemption Value, Adjustment	(1,178,000)	(1,178,000)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	1,606,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					5,278,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	57,541,000
Temporary Equity, Accretion to Redemption Value, Adjustment	(1,178,000)	(1,178,000)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 0		0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	27,696
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 173,000	173,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	1,606,000
Net income attributable to Green Brick Partners, Inc.	52,263,000			52,263,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					5,278,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	57,541,000
Noncontrolling Interest, Change in Redemption Value	1,178,000
Additional Paid in Capital	292,157,000	292,157,000
Treasury Stock, Value	$ 3,167,000
Treasury Stock, Common, Shares	391,939
Common Stock, Shares, Issued	51,151,911
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 511,000		511,000
Treasury Stock, Value	$ 3,167,000
Common Stock, Shares, Issued	51,151,911
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 511,000		511,000
Treasury Stock, Common, Shares	391,939
Additional Paid in Capital	$ 292,157,000	292,157,000
Retained Earnings (Accumulated Deficit)	427,888,000
Stockholders' Equity Attributable to Parent	717,389,000
Stockholders' Equity Attributable to Noncontrolling Interest	14,302,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	731,691,000
Additional Paid in Capital	289,641,000
Treasury Stock, Value	$ 3,167,000
Treasury Stock, Common, Shares	391,939
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 7.49
Common Stock, Shares, Issued	51,151,911
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 512,000
Treasury Stock, Value	$ 3,167,000
Common Stock, Shares, Issued	51,151,911
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 512,000
Treasury Stock, Common, Shares	391,939
Additional Paid in Capital	$ 289,641,000
Retained Earnings (Accumulated Deficit)	539,866,000
Stockholders' Equity Attributable to Parent	874,548,000
Stockholders' Equity Attributable to Noncontrolling Interest	14,146,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 888,694,000
Preferred stock, shares outstanding (in shares)	2,000
Preferred Stock, Including Additional Paid in Capital	$ 47,696,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 3 months 29 days
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	169,662
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 2,754,000	2,752,000	2,000
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ 1,075,000	1,074,000	(1,000)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	46,415
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 460,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	5,718,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					7,676,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	$ 170,509,000
Granted (in shares)	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	2 years 3 months 29 days
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ 1,075,000	1,074,000	(1,000)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 2,754,000	2,752,000	2,000
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	169,662
Dividends	$ (1,374,000)
Stock Repurchased During Period, Value	$ (92,312,000)
Stock Repurchased During Period, Shares	(4,412,213)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	46,415
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 460,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	5,718,000
Net income attributable to Green Brick Partners, Inc.	162,833,000			162,833,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					7,676,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	170,509,000
Noncontrolling Interest, Change in Redemption Value	1,557,000	1,557,000
Payment for Contingent Consideration Liability, Operating Activities	0
Additional Paid in Capital	292,155,000
Treasury Stock, Value	$ 28,968,000
Treasury Stock, Common, Shares	1,584,976
Common Stock, Shares, Issued	51,245,206
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 512,000
Treasury Stock, Value	$ 28,968,000
Common Stock, Shares, Issued	51,245,206
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 512,000
Treasury Stock, Common, Shares	1,584,976
Additional Paid in Capital	$ 292,155,000
Retained Earnings (Accumulated Deficit)	600,788,000
Stockholders' Equity Attributable to Parent	912,183,000
Stockholders' Equity Attributable to Noncontrolling Interest	10,178,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 922,361,000
Preferred stock, shares outstanding (in shares)	2,000
Preferred Stock, Value, Outstanding	$ 47,696
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	29,952
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 2,000	1,000	1,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	180,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					5,926,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	107,182,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 2,000	1,000	1,000
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	29,952
Dividends	$ (719,000)
Stock Repurchased During Period, Value	$ (66,511,000)
Stock Repurchased During Period, Shares	(3,219,176)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 180,000
Net income attributable to Green Brick Partners, Inc.	101,256,000			$ 101,256,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest					$ 5,926,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	107,182,000
Noncontrolling Interest, Change in Redemption Value	1,000,000	1,000,000
Additional Paid in Capital	293,336,000	293,336,000
Treasury Stock, Value	$ 95,479,000
Treasury Stock, Common, Shares	4,804,152
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 7.49
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 6,040,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 7.49
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 6,040,000
Common Stock, Shares, Issued	51,275,158
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 513,000		513,000
Treasury Stock, Value	$ 95,479,000
Common Stock, Shares, Issued	51,275,158
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,275,158 and 51,151,911 issued and 46,471,006 and 50,759,972 outstanding as of June 30, 2022 and December 31, 2021, respectively	$ 513,000		$ 513,000
Treasury Stock, Common, Shares	4,804,152
Additional Paid in Capital	$ 293,336,000	$ 293,336,000
Retained Earnings (Accumulated Deficit)	701,325,000
Stockholders' Equity Attributable to Parent	947,391,000
Stockholders' Equity Attributable to Noncontrolling Interest	16,104,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 963,495,000
Preferred stock, shares outstanding (in shares)	2,000
Preferred Stock, Including Additional Paid in Capital	$ 47,696,000
Preferred Stock, Value, Outstanding	$ 47,696,000