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Initial Project Cost

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- Definition

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Intercompany Loan, Outstanding

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- Definition

Long-Term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. This does not include advances to clients.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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

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Amount of cash distribution paid to unit-holder of limited partnership (LP).

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

Description of intercompany loans made between the LLC or LP and its managing member or general partner or affiliates, including the amount of loan, key terms of loan, type of note, date of issuance, collateral held, interest rate, and allowance for doubtful accounts provided for, if any.

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- Definition

Amount of expense for investment management fee, including, but not limited to, expense in connection with research, selection, supervision, and custody of investment.

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Description of distribution policies and requirements by unit class including dates and amounts of required payments, methods for determining distribution amounts such as an allocation percentage of net income, and other details of distributions.

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The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

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- Definition

The cash inflow from parent as a source of financing that is recorded as additional paid in capital.

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The cash inflow from the capital received in cash from a partner in a partnership during the period.

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The percentage charged for managing real estate properties.

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Limited Partnerships (Details) - USD ($)	1 Months Ended			3 Months Ended		9 Months Ended
Limited Partnerships (Details) - USD ($)	Oct. 31, 2025	Sep. 30, 2025	Apr. 30, 2023	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Dec. 31, 2024	Aug. 31, 2024	Apr. 30, 2024
Limited Partnerships [Line Items]
Intercompany Loan, Amount		$ 1,100,000		$ 1,100,000		$ 1,100,000		$ 1,100,000
Cash and cash equivalents		55,040,000		$ 55,040,000		55,040,000	$ 20,178,000
Partners' Capital, Distributions Policies				the parties to The Saint June, L.P. partnership agreement entered into an amendment to allow for up to $3.0 million of distributions to the partners between September 1, 2025 through September 30, 2027 prior to the partnership’s repayment of the operating loans
Stratus Properties Inc
Limited Partnerships [Line Items]
Cash and cash equivalents		$ 3,800,000		$ 3,800,000		$ 3,800,000
Saint George L.P. \| Stratus Properties Inc
Limited Partnerships [Line Items]
Equity Method Investment, Ownership Percentage		10.00%		10.00%		10.00%
Proceeds from Contributions from Parent				$ 323,000	$ 400,000
Saint George L.P. \| Unrelated Equity Investor
Limited Partnerships [Line Items]
Proceeds from Contributions from Parent				2,900,000	3,600,000
Stratus Block 150, L.P.
Limited Partnerships [Line Items]
Intercompany Loan, Amount		$ 1,500,000		1,500,000	2,400,000	$ 1,500,000
Intercompany Loan, Outstanding		$ 8,300,000		$ 8,300,000		$ 8,300,000
Stratus Block 150, L.P. \| Stratus Properties Inc
Limited Partnerships [Line Items]
Equity Method Investment, Ownership Percentage		31.00%		31.00%		31.00%
Intra-Entity Loan, Description						Stratus has made operating loans to Stratus Block 150, L.P. to facilitate the partnership’s ability to pay ongoing costs, including debt service, of The Annie B project during the pre-construction period. The loans bear interest at one-month Term Secured Overnight Financing Rate (SOFR) plus 5.00 percent, are subordinate to The Annie B land loan and must be repaid before distributions may be made to the partners. In first-quarter 2024, Stratus made an operating loan of $2.4 million. In third-quarter 2024, Stratus made an operating loan of $1.1 million. In first-quarter 2025, Stratus made an operating loan of $1.5 million. In third-quarter 2025, Stratus made an operating loan of $1.1 million. As of September 30, 2025, Stratus’ operating loans outstanding to Stratus Block 150, L.P. totaled $8.3 million.
Basis spread on variable rate			5.00%
Saint June, L.P.
Limited Partnerships [Line Items]
Intra-Entity Loan, Description						Stratus and the Class B limited partner in The Saint June partnership have made operating loans to The Saint June, L.P. to support the partnership’s ability to pay its construction loan interest, which has exceeded the amount anticipated because of prior interest rate increases. The loans bear interest at one-month Term SOFR plus 5.00 percent, are subordinate to The Saint June construction loan and, unless approved by all partners, no distributions may be made to the partners until the operating loans are repaid. In third-quarter 2025, The Saint June partnership was amended to allow for up to $3.0 million of distributions to the partners prior to the repayment of the operating loans. In first-quarter 2024, Stratus made an operating loan of $339 thousand, and the Class B limited partner made an operating loan of $339 thousand to The Saint June, L.P. In second-quarter 2024, Stratus made an operating loan of $85 thousand, and the Class B limited partner made an operating loan of $165 thousand to The Saint June, L.P. No loans were made in third-quarter 2024 or the first nine months of 2025
Saint June, L.P. \| Stratus Properties Inc
Limited Partnerships [Line Items]
Equity Method Investment, Ownership Percentage		34.13%		34.13%		34.13%
Basis spread on variable rate						5.00%
Intercompany Loan, Amount		$ 0		$ 0	339,000	$ 0			$ 85,000
Intercompany Loan, Outstanding					962,000
Saint June, L.P. \| Stratus Properties Inc \| Subsequent event
Limited Partnerships [Line Items]
Distribution Made to Limited Partner, Cash Distributions Paid	$ 225,000
Saint June, L.P. \| Unrelated Equity Investor
Limited Partnerships [Line Items]
Intercompany Loan, Amount					339,000				$ 165,000
Intercompany Loan, Outstanding					$ 493,000
Distribution Made to Limited Partner, Maximum Cash Distributions Allowed		1,500,000		3,000,000
Saint June, L.P. \| Unrelated Equity Investor \| Subsequent event
Limited Partnerships [Line Items]
Distribution Made to Limited Partner, Cash Distributions Paid	$ 435,000
Holden Hills
Limited Partnerships [Line Items]
Advances to Affiliate		$ 1,300,000		$ 1,300,000		$ 1,300,000
Holden Hills \| Stratus Properties Inc
Limited Partnerships [Line Items]
Equity Method Investment, Ownership Percentage		50.00%		50.00%		50.00%
Stratus Kingwood, L.P. [Member] \| Stratus Properties Inc
Limited Partnerships [Line Items]
Equity Method Investment, Ownership Percentage		60.00%		60.00%		60.00%
Holden Hills Phase 2
Limited Partnerships [Line Items]
Initial Project Cost				$ 800,000
Management Fee Expense				$ 39,875
Property Management Fee, Percent Fee				4.00%
Advances to Affiliate		$ 1,600,000		$ 1,600,000		$ 1,600,000
Holden Hills Phase 2 \| Stratus Properties Inc
Limited Partnerships [Line Items]
Equity Method Investment, Ownership Percentage		50.00%		50.00%		50.00%
Proceeds from Partnership Contribution				$ 95,700,000
Payments of Distributions to Affiliates				47,800,000
Holden Hills Phase 2 \| Stratus Properties Inc \| Holden Hills Phase 2 Land
Limited Partnerships [Line Items]
Proceeds from Partnership Contribution				86,900,000
Holden Hills Phase 2 \| Stratus Properties Inc \| Tecoma Improvements
Limited Partnerships [Line Items]
Proceeds from Partnership Contribution				$ 8,800,000
Holden Hills Phase 2 \| Unrelated Equity Investor
Limited Partnerships [Line Items]
Equity Method Investment, Ownership Percentage		50.00%		50.00%		50.00%
Proceeds from Partnership Contribution				$ 47,800,000