Mortgages and Other Notes Payable - Schedule of Mortgages and Other Notes Payable (Details) $ in Thousands	9 Months Ended
Sep. 30, 2025 USD ($) extension_option	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Carrying Value	$ 227,028	$ 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 (in years)	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
Debt Instrument [Line Items]
Carrying Value	$ 0	10,939
Mortgages \| Alera
Debt Instrument [Line Items]
Carrying Value	$ 27,489	8,554
Interest Rate	7.24%
Mortgages \| Bandera Ridge
Debt Instrument [Line Items]
Carrying Value	$ 15,903	0
Interest Rate	7.24%
Mortgages \| Blue Lake Villas
Debt Instrument [Line Items]
Carrying Value	$ 9,192	9,327
Interest Rate	3.15%
Mortgages \| Blue Lake Villas Phase II
Debt Instrument [Line Items]
Carrying Value	$ 3,212	3,271
Interest Rate	2.85%
Mortgages \| Chelsea
Debt Instrument [Line Items]
Carrying Value	$ 7,734	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	$ 6,436	6,421
Interest Rate	6.39%
Mortgages \| Landing on Bayou Cane
Debt Instrument [Line Items]
Carrying Value	$ 13,946	14,162
Interest Rate	3.52%
Mortgages \| Legacy at Pleasant Grove
Debt Instrument [Line Items]
Carrying Value	$ 12,122	12,381
Interest Rate	3.55%
Mortgages \| Merano
Debt Instrument [Line Items]
Carrying Value	$ 20,045	0
Interest Rate	7.50%
Mortgages \| New Concept Energy
Debt Instrument [Line Items]
Carrying Value	$ 3,542	3,542
Interest Rate	4.45%
Mortgages \| Northside on Travis
Debt Instrument [Line Items]
Carrying Value	$ 10,919	11,125
Interest Rate	2.50%
Mortgages \| Parc at Denham Springs
Debt Instrument [Line Items]
Carrying Value	$ 15,776	16,048
Interest Rate	3.75%
Mortgages \| Parc at Denham Springs Phase II
Debt Instrument [Line Items]
Carrying Value	$ 15,273	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	$ 10,060	10,219
Interest Rate	3.60%
Mortgages \| Villas at Bon Secour
Debt Instrument [Line Items]
Carrying Value	$ 18,484	18,798
Interest Rate	3.08%
Mortgages \| Villas of Park West I
Debt Instrument [Line Items]
Carrying Value	$ 8,831	8,983
Interest Rate	3.04%
Mortgages \| Villas of Park West II
Debt Instrument [Line Items]
Carrying Value	$ 8,023	8,158
Interest Rate	3.18%
Mortgages \| Vista Ridge
Debt Instrument [Line Items]
Carrying Value	$ 9,211	9,342
Interest Rate	4.00%
Mortgages \| Windmill Farms
Debt Instrument [Line Items]
Carrying Value	$ 2,394	$ 2,395
Interest Rate	7.50%

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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The cash inflow from borrowings to finance the cost of construction.

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