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Debt (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 13 Months Ended
May 11, 2023
USD ($)
Sep. 01, 2022
USD ($)
$ / shares
Aug. 31, 2023
USD ($)
Jul. 31, 2023
USD ($)
Mar. 31, 2023
USD ($)
Feb. 28, 2023
USD ($)
Jan. 31, 2023
Jun. 30, 2023
USD ($)
Mar. 31, 2023
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
$ / shares
shares
Jun. 30, 2022
USD ($)
Aug. 09, 2023
USD ($)
$ / shares
shares
Jul. 01, 2023
USD ($)
May 01, 2023
USD ($)
Dec. 31, 2022
USD ($)
May 01, 2022
USD ($)
Debt Instrument [Line Items]                                  
Debt               $ 137,432,000     $ 137,432,000         $ 122,765,000  
Unamortized debt issuance costs               2,000,000     2,000,000         1,100,000  
Common Stock, Dividends, Per Share, Declared | $ / shares   $ 4.67                              
Interest costs incurred               2,900,000   $ 1,500,000 5,300,000 $ 2,600,000          
Dividends, Common Stock, Cash   $ 40,000,000                              
Stock Repurchase Program, Authorized Amount   $ 10,000,000                              
Dividends Payable               700,000     700,000         1,300,000  
Stock Repurchased During Period, Value               695,000 $ 894,000   $ 1,600,000            
Stock Repurchased During Period, Shares | shares                     74,306            
Treasury Stock Acquired, Average Cost Per Share | $ / shares                     $ 21.36            
Subsequent event                                  
Debt Instrument [Line Items]                                  
Stock Repurchased During Period, Value                         $ 9,800,000        
Stock Repurchased During Period, Shares | shares                         381,889        
Treasury Stock Acquired, Average Cost Per Share | $ / shares                         $ 25.65        
Stock Repurchase Program, Remaining Authorized Repurchase Amount                         $ 200,000        
Comerica Bank revolving credit facility                                  
Debt Instrument [Line Items]                                  
Debt               0     $ 0         0  
Comerica Bank revolving credit facility | Letter of Credit                                  
Debt Instrument [Line Items]                                  
Letters of credit committed               11,000,000     11,000,000            
Comerica Bank revolving credit facility | Letter of Credit | Revolving Credit Facility                                  
Debt Instrument [Line Items]                                  
Line of Credit Facility, Maximum Borrowing Capacity                             $ 13,300,000   $ 11,500,000
Comerica Bank revolving credit facility | Letter of Credit | Revolving Credit Facility | Subsequent event | Lakeway                                  
Debt Instrument [Line Items]                                  
New letter of credit                           $ 2,300,000      
Municipal improvements       $ 2,300,000                          
Comerica Bank revolving credit facility | Revolving Credit Facility                                  
Debt Instrument [Line Items]                                  
Credit facility, available borrowing capacity               42,700,000     42,700,000            
Debt Instrument, Debt Covenant, Consent for Common Stock Repurchases, Amount               1,000,000     1,000,000            
Comerica Bank revolving credit facility | Revolving Credit Facility | Subsequent event                                  
Debt Instrument [Line Items]                                  
Credit facility, available borrowing capacity                         $ 40,400,000        
Comerica Bank revolving credit facility | Revolving Credit Facility | Bloomberg short-term bank yield index                                  
Debt Instrument [Line Items]                                  
Debt Instrument, Interest Rate Floor         (0.50%)                        
Basis spread on variable rate         4.00%                        
Jones Crossing loan                                  
Debt Instrument [Line Items]                                  
Debt               22,289,000     $ 22,289,000         24,143,000  
Repayments of Debt $ 1,700,000         $ 231,000                      
Debt Instrument, Covenant, Debt Service Coverage Ratio                     1.15            
Jones Crossing loan | Subsequent event                                  
Debt Instrument [Line Items]                                  
Repayments of Debt     $ 1,200,000                            
The Annie B land loan                                  
Debt Instrument [Line Items]                                  
Debt               13,950,000     $ 13,950,000         13,969,000  
Debt instrument, interest reserve           $ 600,000                      
The Annie B land loan | Bloomberg short-term bank yield index                                  
Debt Instrument [Line Items]                                  
Debt Instrument, Interest Rate Floor           (0.50%)                      
Basis spread on variable rate           3.00%                      
New Caney land loan                                  
Debt Instrument [Line Items]                                  
Debt               0     0         4,047,000  
Kingwood Place                                  
Debt Instrument [Line Items]                                  
Debt               28,044,000     28,044,000         27,507,000  
Lantana Place                                  
Debt Instrument [Line Items]                                  
Debt               21,792,000     21,792,000         21,782,000  
The Saint June                                  
Debt Instrument [Line Items]                                  
Debt               24,617,000     24,617,000         13,829,000  
The Saint June | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate                                  
Debt Instrument [Line Items]                                  
Debt Instrument, Interest Rate Floor             (0.75%)                    
Basis spread on variable rate             2.85%                    
Debt Instrument, Basis Spread Floor             3.50%                    
Magnolia Place Construction Loan [Member]                                  
Debt Instrument [Line Items]                                  
Debt               8,006,000     8,006,000         6,816,000  
Magnolia Place Construction Loan [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate                                  
Debt Instrument [Line Items]                                  
Debt Instrument, Interest Rate Floor 0.00%                                
Basis spread on variable rate 3.36%                                
Debt Instrument, Basis Spread Floor 3.50%                                
West Killeen Market                                  
Debt Instrument [Line Items]                                  
Debt               5,276,000     5,276,000         5,306,000  
Amarra Villas revolving credit facility                                  
Debt Instrument [Line Items]                                  
Debt               10,951,000     10,951,000         5,366,000  
Amarra Villas revolving credit facility | Line of credit                                  
Debt Instrument [Line Items]                                  
Repayments of Debt         $ 2,200,000                        
Holden Hills construction loan | Construction Loan Payable                                  
Debt Instrument [Line Items]                                  
Debt Instrument, Covenant, Loan to Value Ratio           0.28                      
Debt Covenant, net asset value           $ 125,000,000                      
Debt principal           $ 26,100,000                      
Construction cost percent           23.00%                      
Holden Hills construction loan | Construction Loan Payable | Bloomberg short-term bank yield index                                  
Debt Instrument [Line Items]                                  
Debt Instrument, Interest Rate Floor           (0.50%)                      
Basis spread on variable rate           3.00%                      
Saint George construction loan                                  
Debt Instrument [Line Items]                                  
Debt               $ 2,507,000     $ 2,507,000         $ 0