Statement of Shareholders' Equity (Statement) - USD ($)	Total	Additional Paid-in Capital [Member]	Common Stock [Member]
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; 51,245,206 and 51,151,911 issued and 49,660,230 and 50,759,972 outstanding as of March 31, 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; 51,245,206 and 51,151,911 issued and 49,660,230 and 50,759,972 outstanding as of March 31, 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	111,675
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	$ 146,000
Temporary Equity, Accretion to Redemption Value, Adjustment		(1,829,000)
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	1,463,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	27,432,000
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	146,000
Temporary Equity, Accretion to Redemption Value, Adjustment		(1,829,000)
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	111,675
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	41,318
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 146,000
Net income attributable to Green Brick Partners, Inc.	25,969,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	1,463,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	27,432,000
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	146,000
Dividends, Preferred Stock	0
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; 51,245,206 and 51,151,911 issued and 49,660,230 and 50,759,972 outstanding as of March 31, 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; 51,245,206 and 51,151,911 issued and 49,660,230 and 50,759,972 outstanding as of March 31, 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
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; 51,245,206 and 51,151,911 issued and 49,660,230 and 50,759,972 outstanding as of March 31, 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; 51,245,206 and 51,151,911 issued and 49,660,230 and 50,759,972 outstanding as of March 31, 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, Value, Outstanding	$ 47,696,000
Preferred stock, shares outstanding (in shares)	2,000
Preferred Stock, Liquidation Preference Per Share	$ 25,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 6 months 29 days
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	139,710
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 2,752,000	2,751,000	1,000
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	$ 280,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	5,718,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	1,750,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	$ 63,327,000
Granted (in shares)
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 6 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	$ 2,752,000	2,751,000	1,000
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	139,710
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	46,415
Dividends	$ (655,000)
Treasury Stock, Value, Acquired, Cost Method	$ (25,801,000)
Treasury Stock, Shares, Acquired	(1,193,037)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 280,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	5,718,000
Net income attributable to Green Brick Partners, Inc.	61,577,000
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	1,750,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	63,327,000
Noncontrolling Interest, Change in Redemption Value	$ 557,000	557,000
Preferred Stock, Dividend Rate, Percentage	5.75%
Dividends, Preferred Stock	$ 700,000
Additional Paid in Capital	292,155,000	292,155,000
Treasury Stock, Value	$ 28,968,000
Treasury Stock, Common, Shares	1,584,976
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	$ 6,135,000
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	$ 6,135,000
Common Stock, Shares, Issued	51,245,206
Common stock, $0.01 par value: 100,000,000 shares authorized; 51,245,206 and 51,151,911 issued and 49,660,230 and 50,759,972 outstanding as of March 31, 2022 and December 31, 2021, respectively	$ 512,000		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; 51,245,206 and 51,151,911 issued and 49,660,230 and 50,759,972 outstanding as of March 31, 2022 and December 31, 2021, respectively	$ 512,000		$ 512,000
Treasury Stock, Common, Shares	1,584,976
Additional Paid in Capital	$ 292,155,000	$ 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, Value, Outstanding	$ 47,696,000
Preferred stock, shares outstanding (in shares)	2,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 24,199,000