Mortgages and Other Notes Payable - Schedule of Mortgages and Other Notes Payable (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($) extension_option	Dec. 31, 2024 USD ($)	Feb. 08, 2024
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 198,153	$ 181,856
Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	198,153	181,856
770 South Post Oak | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 10,872	10,939
Interest Rate	4.36%
Alera
Debt Instrument [Line Items]
Proceeds from construction loans payable	$ 33,000
Variable interest rate	3.00%
Number of extension options | extension_option	2
Extension term	1 year
Alera | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 12,020	8,554
Interest Rate	7.41%
Bandera Ridge
Debt Instrument [Line Items]
Proceeds from construction loans payable	$ 23,500
Variable interest rate	3.00%
Bandera Ridge | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 5,348	0
Interest Rate	7.41%
Blue Lake Villas | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 9,282	9,327
Interest Rate	3.15%
Blue Lake Villas Phase II | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 3,252	3,271
Interest Rate	2.85%
Chelsea | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 7,831	7,878
Interest Rate	3.36%
EQK Portage | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 3,350	3,350
Interest Rate	5.00%
Forest Grove | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 6,426	6,421
Interest Rate	6.56%
Variable interest rate	2.15%
Landing on Bayou Cane | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 14,090	14,162
Interest Rate	3.52%
Legacy at Pleasant Grove | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 12,295	12,381
Interest Rate	3.55%
Merano
Debt Instrument [Line Items]
Proceeds from construction loans payable	$ 25,407
Variable interest rate	0.25%
Merano | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 8,317	0
Interest Rate	7.75%
Northside on Travis | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 11,056	11,125
Interest Rate	2.50%
Parc at Denham Springs | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 15,958	16,048
Interest Rate	3.75%
Parc at Denham Springs Phase II | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 15,371	15,419
Interest Rate	4.05%
RCM HC Enterprises | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 5,086	5,086
Interest Rate	5.00%
Residences at Holland Lake | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 10,167	10,219
Interest Rate	3.60%
Villas at Bon Secour | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 18,692	18,798
Interest Rate	3.08%
Villas of Park West I | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 8,933	8,983
Interest Rate	3.04%
Villas of Park West II | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 8,113	8,158
Interest Rate	3.18%
Vista Ridge | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 9,299	9,342
Interest Rate	4.00%
Windmill Farms | Mortgages and other notes payable
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 2,395	$ 2,395
Interest Rate	7.50%		7.50%