v3.26.3
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2026
Oct. 22, 2026
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2026  
Document Transition Report false  
Entity File Number 001-33530  
Entity Registrant Name Green Brick Partners, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 5501 Headquarters Drive  
Entity Address, Address Line Two Suite 300W  
Entity Tax Identification Number 20-5952523  
Entity Address, City or Town Plano  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 75024  
City Area Code (469)  
Local Phone Number 573-6755  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   42,432,826
Entity Central Index Key 0001373670  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q3  
NYSE TEXAS, INC.    
Entity Information [Line Items]    
Security Exchange Name NYSE  
NEW YORK STOCK EXCHANGE, INC.    
Entity Information [Line Items]    
Security Exchange Name NYSE  
Common Stock    
Entity Information [Line Items]    
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol GRBK  
Series A Preferred Stock    
Entity Information [Line Items]    
Title of 12(b) Security Depositary Shares (each representing a 1/1000th interest in a share of 5.75% Series A Cumulative Perpetual Preferred Stock, par value $0.01 per share)  
Trading Symbol GRBK PRA  
Security Exchange Name NYSE