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River Holdings, LLC EJB River Holdings, LLC [Member] EJB River Holdings, LLC Transferred over Time [Member] Transferred over Time [Member] Inventory Write-down Inventory Write-down Derivative Instrument [Axis] Derivative Instrument [Axis] Preferred Stock, Dividend Rate, Per-Dollar-Amount Preferred Stock, Dividend Rate, Per-Dollar-Amount Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Preferred stock, $0.01 par value: 5,000,000 shares authorized; 2,000 issued and outstanding as of June 30, 2026 and December 31, 2025, respectively Preferred Stock, Including Additional Paid in Capital Lessee, Operating Lease, Liability, to be Paid, after Year Five Lessee, Operating Lease, Liability, to be Paid, after Year Five 2027 Notes 2027 Notes [Member] 2027 Notes Leases [Abstract] Leases [Abstract] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service 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NEW YORK STOCK EXCHANGE, INC. 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revenues Real Estate Inventory, Capitalized Interest Costs, Cost of Sales Interest incurred Real Estate Inventory, Capitalized Interest Costs Incurred Land Available for Development Land Available for Development Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Long-Term Debt, Maturity, Year Five Long-Term Debt, Maturity, Year Five Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Derivative, Fair Value, Net Derivative Liability Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value GHO Homes [Member] GHO Homes [Member] GHO Homes [Member] Income tax expense Income Tax Expense (Benefit) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Cost of Product and Service Sold Cost of Product and Service Sold Principles of Consolidation Consolidation, Policy [Policy Text Block] Forecast [Member] Forecast [Member] Net income attributable to Green Brick Partners, Inc. Net income attributable to Green Brick Partners, Inc. Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Statement [Table] Statement [Table] Warranty reserve Warranty reserve Warranty reserve Line of Credit, Current, After Adjustments Line of Credit, Current, After Adjustments Line of Credit, Current, After Adjustments Liabilities assumed Business Combination, Recognized Liability Assumed, Liability [Abstract] Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount US Southeast Region US Southeast Region [Member] Accrued Income Taxes Accrued Income Taxes Revenues: Revenues [Abstract] Land Subdivider and Developers Land Subdivider and Developers [Member] Land Subdivider and Developers Summary of Real Estate Inventory Capitalized Interest Costs Summary of Real Estate Inventory Capitalized Interest Costs [Table Text Block] Summary of Real Estate Inventory Capitalized Interest Costs [Table Text Block]