v3.26.1
Investment in Unconsolidated Entities (Details) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Apr. 26, 2018
Aug. 15, 2017
Schedule of Equity Method Investments [Line Items]                                
Equity Method Investments                     $ 93,050,000 $ 60,582,000        
Revenues $ 484,216,000 $ 534,563,000 $ 484,453,000 $ 514,329,000 $ 552,507,000 $ 439,174,000 $ 1,019,016,000 $ 991,681,000 $ 1,503,232,000 $ 1,506,010,000 2,039,994,000 2,061,475,000 $ 1,749,310,000      
Net income                     343,511,000 417,155,000 306,675,000      
Cash                     154,590,000 141,543,000        
Assets                     2,534,767,000 2,249,994,000        
Liabilities                     601,782,000 551,831,000        
Stockholders' Equity Attributable to Parent                     1,858,962,000 1,625,415,000 1,300,704,000 $ 1,061,907,000    
Stockholders' Equity Attributable to Noncontrolling Interest                     21,752,000 28,039,000 17,309,000 20,908,000    
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest                     1,880,714,000 1,653,454,000 1,318,013,000 $ 1,082,815,000    
Liabilities and Equity                     2,534,767,000 2,249,994,000        
Income (Loss) from Equity Method Investments                     1,002,000 5,083,000 16,742,000      
Guarantor Obligations, Maximum Exposure, Undiscounted                     22,500,000          
Contributions of LLC Members                     1,600,000          
Payments to Acquire Equity Method Investments                     38,756,000 31,757,000 5,547,000      
Goodwill                     680,000 680,000     $ 700,000  
Challenger [Member]                                
Schedule of Equity Method Investments [Line Items]                                
Income (Loss) from Equity Method Investments                     0 929,000 10,921,000      
Equity Method Investment, Ownership Percentage                               49.90%
EJB River Holdings, LLC [Member]                                
Equity Method Investments and Joint Ventures [Abstract]                                
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount                     8,100,000          
Schedule of Equity Method Investments [Line Items]                                
Equity Method Investments                     8,075,000 12,288,000        
Income (Loss) from Equity Method Investments                     $ 2,288,000 2,421,000 2,812,000      
Equity Method Investment, Ownership Percentage                     50.00%          
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount                     $ 8,100,000          
BHome Mortgage [Member]                                
Schedule of Equity Method Investments [Line Items]                                
Equity Method Investments                     0 670,000        
Income (Loss) from Equity Method Investments                     120,000 1,733,000 3,009,000      
Green Brick Mortgage, LLC [Member]                                
Schedule of Equity Method Investments [Line Items]                                
Equity Method Investments                       18,633,000        
Income (Loss) from Equity Method Investments                     (1,406,000) 0 0      
GBTM Sendera [Member]                                
Equity Method Investments and Joint Ventures [Abstract]                                
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount                     37,000,000.0          
Schedule of Equity Method Investments [Line Items]                                
Equity Method Investments                     $ 21,985,000 21,985,000        
Equity Method Investment, Ownership Percentage                     50.00%          
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount                     $ 37,000,000.0          
Rainwater Crossing                                
Equity Method Investments and Joint Ventures [Abstract]                                
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount                     61,100,000          
Schedule of Equity Method Investments [Line Items]                                
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount                     61,100,000          
Equity Method Investment, Underlying Equity in Net Assets                     51,484,000          
Equity Method Investment, Nonconsolidated Investee, Other                                
Schedule of Equity Method Investments [Line Items]                                
Revenues                     31,549,000 49,124,000 270,322,000      
Costs and Expenses                     26,729,000 38,875,000 236,038,000      
Net income                     4,820,000 10,249,000 34,284,000      
Cash                     10,713,000 7,334,000        
Accounts and Other Receivables, Net, Current                     1,615,000 488,000        
Financing Receivable, after Allowance for Credit Loss                     9,599,000 12,038,000        
Inventory, Net                     177,003,000 111,771,000        
Other Assets, Current                     2,284,000 1,738,000        
Assets                     201,214,000 133,369,000        
Accounts Payable, Current                     8,050,000 6,280,000        
Accrued Liabilities, Current                     10,746,000 1,369,000        
Notes Payable, Current                     37,274,000 23,194,000        
Liabilities                     56,070,000 30,843,000        
Stockholders' Equity Attributable to Parent                     93,051,000 58,312,000        
Stockholders' Equity Attributable to Noncontrolling Interest                     52,093,000 44,214,000        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest                     145,144,000 102,526,000        
Liabilities and Equity                     201,214,000 133,369,000        
GBTM Sendera [Member]                                
Schedule of Equity Method Investments [Line Items]                                
Assets                     60,800,000          
Liabilities                     $ 16,800,000          
Contributions of LLC Members                       $ 2,000,000.0 $ 5,000,000.0