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Commitments and Contingencies (Details) - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2018
Feb. 28, 2025
Jan. 31, 2025
May 01, 2023
Feb. 28, 2023
Long-term Purchase Commitment [Line Items]                
Noncancellable construction contract commitments   $ 10,000,000            
Minimum annual rental income under long-term operating leases:                
Year one   10,800,000            
Year two   11,000,000.0            
Year three   10,800,000            
Year four   10,200,000            
Year five   8,400,000            
After year five   76,000,000.0            
Operating lease, cost   $ 2,100,000 $ 2,100,000          
Lessee, Finance Lease, Remaining Lease Term   3 years            
Lessee, Finance Lease, Discount Rate   6.40%            
Holden Hills                
Minimum annual rental income under long-term operating leases:                
Municipal improvements remaining   $ 3,500,000            
Scenario, Forecast [Member] | Holden Hills                
Minimum annual rental income under long-term operating leases:                
Capital Contribution $ 125,000              
Deferred Profit Sharing [Member]                
Long-term Purchase Commitment [Line Items]                
Preferred return percent   10.00%   10.00%        
Stratus Block 150, L.P., The Saint June, L.P. and The Saint George Apartments, L.P. Construction Loans | Scenario, Forecast [Member]                
Minimum annual rental income under long-term operating leases:                
Basis Spread on Variable Rate 5.00%              
Long-term Debt, Gross $ 1,700,000              
Letter of Credit [Member] | Comerica credit facility [Member] | Letter of Credit [Member]                
Minimum annual rental income under long-term operating leases:                
Letters of Credit Outstanding, Amount   $ 13,300,000           $ 2,300,000
Letter of Credit [Member] | Comerica credit facility [Member] | Letter of Credit [Member] | Subsequent Event                
Minimum annual rental income under long-term operating leases:                
Letters of Credit Outstanding, Amount         $ 2,300,000 $ 15,600,000    
Letter of Credit [Member] | Comerica credit facility [Member] | Revolving Line of Credit Tranche [Member]                
Minimum annual rental income under long-term operating leases:                
Letters of Credit Outstanding, Amount     $ 11,500,000       $ 13,300,000  
Letter of Credit [Member] | Comerica Credit Facility, Holden Hills and Section N Obligation | Revolving Line of Credit Tranche [Member]                
Minimum annual rental income under long-term operating leases:                
Letters of Credit Outstanding, Amount             $ 11,000,000  
HEB Store [Member]                
Long-term Purchase Commitment [Line Items]                
Payments of Participation Interest   10.00%            
Stratus Properties Inc | Holden Hills                
Minimum annual rental income under long-term operating leases:                
Municipal improvements remaining   $ 2,100,000            
Percentage of Costs Reimbursed   60.00%