Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards - Variable Interest Entities (Details) - USD ($) $ in Thousands |
3 Months Ended | ||||
|---|---|---|---|---|---|
Mar. 31, 2023 |
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
Dec. 31, 2024 |
|
| Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards | |||||
| Cash, cash equivalents and restricted cash | $ 22,459 | $ 30,571 | $ 30,518 | $ 42,683 | |
| Variable interest entities ("VIEs") | |||||
| Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards | |||||
| Gain on consolidation of Sponsored REIT | $ 400 | ||||
| Variable interest entities ("VIEs") | FSP Monument Circle LLC | |||||
| Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards | |||||
| Cash, cash equivalents and restricted cash | $ 3,000 |