| Line Item | Jun 30, 2026 | Mar 31, 2026 | Dec 31, 2025 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Dec 31, 2024 | Sep 30, 2024 | Jun 30, 2024 | Mar 31, 2024 | Dec 31, 2023 | Sep 30, 2023 | Jun 30, 2023 | Mar 31, 2023 | Dec 31, 2022 | Sep 30, 2022 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net Interest Income | ||||||||||||||||
| Interest income | ||||||||||||||||
| Interest expense | ||||||||||||||||
| Net interest income (expense) | — | — | ||||||||||||||
| Expenses | ||||||||||||||||
| Related party loan servicing fee | ||||||||||||||||
| Related party management fee | ||||||||||||||||
| Professional fees | ||||||||||||||||
| General and administrative | ||||||||||||||||
| Total expense | ||||||||||||||||
| Other Income (Loss) | ||||||||||||||||
| Realized and unrealized gains (losses), net | — | — | — | |||||||||||||
| Other income (loss), net | ||||||||||||||||
| Total other income (loss), net | ||||||||||||||||
| Income (Loss) Before Income Taxes | ||||||||||||||||
| Income tax expense (benefit) | ||||||||||||||||
| Net Income (Loss) | ||||||||||||||||
| Net income attributable to the noncontrolling interests | ||||||||||||||||
| Net Income (Loss) Attributable to Rithm Property Trust Inc. | ||||||||||||||||
| Dividends on preferred stock | ||||||||||||||||
| Net Income (Loss) Attributable to Common Stockholders | ||||||||||||||||
| Basic (in dollars per share) | — | |||||||||||||||
| Diluted (in dollars per share) | — |