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Organization - Additional Information (Detail) $ in Thousands, ft² in Millions |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 14, 2025 USD ($) Property | Jul. 30, 2025 | Feb. 02, 2023 USD ($) | Jul. 07, 2015 USD ($) JointVenture | Mar. 31, 2025 Property | Mar. 31, 2022 USD ($) | Sep. 30, 2025 USD ($) ft² Acres Property | Sep. 30, 2024 USD ($) Property | Dec. 31, 2022 | Dec. 31, 2024 Property
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Number of properties interested in the portfolio | Property |  |  |  |  |  |  | 13 |  |  |
Number of acres held under development | Acres |  |  |  |  |  |  | 198 |  |  |
Number of real estate properties | Property |  |  |  |  |  |  | 3 |  |  | 0
Non cash deferred tax benefit due to revocation of REIT status |  |  |  |  |  | $ 161,300 |  |  |  |
Net cash (used in) provided by operating activities |  |  |  |  |  |  | $ 33,742 | $ 39,621 |  |
Net cash (used in) provided by investing activities |  |  |  |  |  |  | 43,562 | 71,724 |  |
Proceeds from sale of assets |  |  |  |  |  |  | $ 51,560 | $ 106,472 |  |
Minimum percentage of outstanding common stock required for affirmative vote to approve plan of sale |  |  |  |  |  |  | 66.67% |  |  |
Term Loan Facility [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount outstanding |  |  | $ 800,000 |  |  |  | $ 200,000 |  |  |
Number of properties sold | Property |  |  |  |  |  |  | 2 |  |  |
Proceeds from sale of assets |  |  |  |  |  |  | $ 60,700 |  |  |
Principal payment on loan |  |  | $ 230,000 |  |  |  | $ 40,000 |  |  |
Debt instrument extended maturity term |  |  | 2 years |  |  |  |  |  |  |
Line of credit, extended maturity date |  | Jul. 31, 2026 | Jul. 31, 2025 |  |  |  |  |  |  |
Line of credit, maturity date |  |  |  |  |  |  | Jul. 31, 2026 |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Distribution of taxable income to qualify as REIT, percent |  |  |  |  |  |  | 90.00% |  | 90.00% |
Voting and Support Agreement [Member] | Former Chairman [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage ownership of outstanding common shares after effect of exchange of operating partnership interest |  |  |  |  |  |  | 23.80% |  |  |
COVID-19 Pandemic [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Net cash (used in) provided by operating activities |  |  |  |  |  |  | $ (33,700) |  |  |
Net cash (used in) provided by investing activities |  |  |  |  |  |  | $ 43,600 |  |  |
Sears Holdings Corporation [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Business acquisition fair value, purchase price |  |  |  | $ 2,700,000 |  |  |  |  |  |
Interests in joint ventures acquired |  |  |  | 50.00% |  |  |  |  |  |
Number of joint venture acquired | JointVenture |  |  |  | 3 |  |  |  |  |  |
Unconsolidated Properties [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Area of real estate property (in square feet) | ft² |  |  |  |  |  |  | 0.5 |  |  |
Number of acres held under development | Acres |  |  |  |  |  |  | 85 |  |  |
Number of properties sold | Property |  |  |  |  |  |  | 2 |  |  |
Unconsolidated Properties [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Number of properties | Property | 2 |  |  |  |  |  |  |  |  |
Proceeds from sale of assets | $ 38,500 |  |  |  |  |  |  |  |  |
Consolidated Properties [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Number of properties | Property | 4 |  |  |  |  |  |  |  |  |
Proceeds from sale of assets | $ 240,800 |  |  |  |  |  |  |  |  |
Consolidated Properties [Member] | Negotiating Sales [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Number of properties | Property | 1 |  |  |  |  |  |  |  |  |
Proceeds from sale of assets | $ 11,000 |  |  |  |  |  |  |  |  |
Consolidated Properties with Contingencies [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from sale of assets | $ 70,800 |  |  |  |  |  |  |  |  |
Real Estate Investment Trust [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Area of real estate property (in square feet) | ft² |  |  |  |  |  |  | 1.3 |  |  |
Real Estate Investment Trust [Member] | Unconsolidated Properties [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Number of properties | Property |  |  |  |  |  |  |  | 5 |  |
Real Estate Investment Trust [Member] | Wholly Owned Properties [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Number of acres held under development | Acres |  |  |  |  |  |  | 113 |  |  |
Real Estate Investment Trust [Member] | Consolidated Properties [Member] |  |  |  |  |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |
Area of real estate property (in square feet) | ft² |  |  |  |  |  |  | 0.8 |  |  |
Number of properties | Property |  |  |  |  | 8 |  |  |  |  |

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