| 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 | ||||||||||||||||
| Total net interest income | ||||||||||||||||
| Other Income | ||||||||||||||||
| Revenue from real estate owned operations | ||||||||||||||||
| Income (loss) from equity method investments | ||||||||||||||||
| Change in net assets of consolidated variable interest entities, CMBS trusts | ||||||||||||||||
| Gain (loss) on foreign currency translation (includes unrealized gains (losses) of $2,547 and ($2,829) in 2026 and $0 and $0 in 2025, respectively) | — | — | ||||||||||||||
| Gain (loss) on foreign currency forward contracts (includes unrealized gains (losses) of ($5,333) and $1,488 in 2026 and $0 and $0 in 2025, respectively) | — | — | ||||||||||||||
| Gain (loss) on sale of real estate owned | — | |||||||||||||||
| Other miscellaneous income | ||||||||||||||||
| Total other income | ||||||||||||||||
| Operating Expenses | ||||||||||||||||
| Provision for credit losses, net | ||||||||||||||||
| Change in fair value of loan held-for-sale | — | — | — | |||||||||||||
| Expenses from real estate owned operations | ||||||||||||||||
| Management fee to related parties | ||||||||||||||||
| General and administrative | ||||||||||||||||
| Total operating expenses | ||||||||||||||||
| Income (Loss) Before Income Taxes | ||||||||||||||||
| Income tax expense | ||||||||||||||||
| Net Income (Loss) | ||||||||||||||||
| Net income (loss) attributable to noncontrolling interests | ||||||||||||||||
| Net Income (Loss) Attributable to KKR Real Estate Finance Trust Inc. and Subsidiaries | ||||||||||||||||
| Preferred stock dividends | ||||||||||||||||
| Participating securities' share in earnings | ||||||||||||||||
| Net Income (Loss) Attributable to Common Stockholders | ||||||||||||||||
| Basic (usd per share) | ||||||||||||||||
| Diluted (usd per share) |