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Mortgages and Other Notes Payable - Schedule of Mortgages and Other Notes Payable (Details)
$ in Thousands
Dec. 15, 2023
USD ($)
Nov. 06, 2023
USD ($)
Mar. 15, 2023
USD ($)
extension_option
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Jul. 10, 2024
Feb. 08, 2024
Debt Instrument [Line Items]              
Carrying Value       $ 201,695 $ 185,398    
Alera              
Debt Instrument [Line Items]              
Proceeds from construction loans payable     $ 33,000        
Variable interest rate (as a percent)     3.00%        
Number of extension options | extension_option     2        
Extension term     1 year        
Bandera Ridge              
Debt Instrument [Line Items]              
Proceeds from construction loans payable $ 23,500            
Bandera Ridge | SOFR              
Debt Instrument [Line Items]              
Variable interest rate (as a percent) 3.00%            
Merano              
Debt Instrument [Line Items]              
Proceeds from construction loans payable   $ 25,407          
Merano | Prime              
Debt Instrument [Line Items]              
Variable interest rate (as a percent)   0.25%          
Mortgages              
Debt Instrument [Line Items]              
Interest Rate           2.15%  
Mortgages | 770 South Post Oak(1)              
Debt Instrument [Line Items]              
Carrying Value       $ 10,872 10,939    
Interest Rate       4.36%      
Mortgages | Alera              
Debt Instrument [Line Items]              
Carrying Value       $ 12,020 8,554    
Interest Rate       7.41%      
Mortgages | Bandera Ridge              
Debt Instrument [Line Items]              
Carrying Value       $ 5,348 0    
Interest Rate       7.41%      
Mortgages | Blue Lake Villas              
Debt Instrument [Line Items]              
Carrying Value       $ 9,282 9,327    
Interest Rate       3.15%      
Mortgages | Blue Lake Villas Phase II              
Debt Instrument [Line Items]              
Carrying Value       $ 3,252 3,271    
Interest Rate       2.85%      
Mortgages | Chelsea              
Debt Instrument [Line Items]              
Carrying Value       $ 7,831 7,878    
Interest Rate       3.36%      
Mortgages | EQK Portage              
Debt Instrument [Line Items]              
Carrying Value       $ 3,350 3,350    
Interest Rate       5.00%      
Mortgages | Forest Grove              
Debt Instrument [Line Items]              
Carrying Value       $ 6,426 6,421    
Interest Rate       6.56%      
Mortgages | Landing on Bayou Cane              
Debt Instrument [Line Items]              
Carrying Value       $ 14,090 14,162    
Interest Rate       3.52%      
Mortgages | Legacy at Pleasant Grove              
Debt Instrument [Line Items]              
Carrying Value       $ 12,295 12,381    
Interest Rate       3.55%      
Mortgages | Merano              
Debt Instrument [Line Items]              
Carrying Value       $ 8,317 0    
Interest Rate       7.75%      
Mortgages | New Concept Energy              
Debt Instrument [Line Items]              
Carrying Value       $ 3,542 3,542    
Interest Rate       4.49%      
Mortgages | Northside on Travis              
Debt Instrument [Line Items]              
Carrying Value       $ 11,056 11,125    
Interest Rate       2.50%      
Mortgages | Parc at Denham Springs              
Debt Instrument [Line Items]              
Carrying Value       $ 15,958 16,048    
Interest Rate       3.75%      
Mortgages | Parc at Denham Springs Phase II              
Debt Instrument [Line Items]              
Carrying Value       $ 15,371 15,419    
Interest Rate       4.05%      
Mortgages | RCM HC Enterprises              
Debt Instrument [Line Items]              
Carrying Value       $ 5,086 5,086    
Interest Rate       5.00%      
Mortgages | Residences at Holland Lake              
Debt Instrument [Line Items]              
Carrying Value       $ 10,167 10,219    
Interest Rate       3.60%      
Mortgages | Villas at Bon Secour              
Debt Instrument [Line Items]              
Carrying Value       $ 18,692 18,798    
Interest Rate       3.08%      
Mortgages | Villas of Park West I              
Debt Instrument [Line Items]              
Carrying Value       $ 8,933 8,983    
Interest Rate       3.04%      
Mortgages | Villas of Park West II              
Debt Instrument [Line Items]              
Carrying Value       $ 8,113 8,158    
Interest Rate       3.18%      
Mortgages | Vista Ridge              
Debt Instrument [Line Items]              
Carrying Value       $ 9,299 9,342    
Interest Rate       4.00%      
Mortgages | Windmill Farms              
Debt Instrument [Line Items]              
Carrying Value       $ 2,395 $ 2,395    
Interest Rate       7.50%     7.50%