Mortgages and Other Notes Payable - Schedule of Notes and Interest Payable (Details) $ in Thousands	12 Months Ended
Dec. 31, 2025 USD ($) extension_option	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 214,367	$ 185,398
Proceeds from construction loans payable	$ 63,781
Mortgages
Debt Instrument [Line Items]
Interest Rate	2.15%
770 South Post Oak
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 0	10,939
Interest Rate	0.00%
Alera
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 29,243	8,554
Interest Rate	6.87%
Proceeds from construction loans payable	$ 33,000
Number of extension options \| extension_option	2
Extension term	1 year
Bandera Ridge
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 18,808	0
Interest Rate	6.66%
Proceeds from construction loans payable	$ 23,500
Variable interest rate (as a percent)	3.00%
Bandera Ridge \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable interest rate (as a percent)	3.00%
Blue Lake Villas
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 9,146	9,327
Interest Rate	3.15%
Blue Lake Villas Phase II
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 3,192	3,271
Interest Rate	2.85%
Chelsea
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 7,686	7,878
Interest Rate	3.36%
EQK Portage
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 3,350	3,350
Interest Rate	5.00%
Forest Grove
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 6,442	6,421
Interest Rate	6.02%
Landing on Bayou Cane
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 13,872	14,162
Interest Rate	3.52%
Legacy at Pleasant Grove
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 12,034	12,381
Interest Rate	3.55%
Merano
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 24,284	0
Interest Rate	7.00%
Proceeds from construction loans payable	$ 25,407
Merano \| Prime
Debt Instrument [Line Items]
Variable interest rate (as a percent)	0.25%
New Concept Energy
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 3,542	3,542
Interest Rate	4.24%
Northside on Travis
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 10,849	11,125
Interest Rate	2.50%
Parc at Denham Springs
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 15,683	16,048
Interest Rate	3.75%
Parc at Denham Springs Phase II
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 15,223	15,419
Interest Rate	4.05%
RCM HC Enterprises
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 5,086	5,086
Interest Rate	5.00%
Residences at Holland Lake
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 10,006	10,219
Interest Rate	3.60%
Villas at Bon Secour
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 0	18,798
Interest Rate	0.00%
Villas of Park West Phase I
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 8,779	8,983
Interest Rate	3.04%
Villas of Park West Phase II
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 7,977	8,158
Interest Rate	3.18%
Vista Ridge
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 9,165	9,342
Interest Rate	4.00%
Windmill Farms
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 0	$ 2,395
Interest Rate	0.00%

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Debt Instrument, Number Of Extension Options

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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