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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) |  | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
May 05, 2021 shares | Mar. 31, 2026 USD ($) sub-servicer loan $ / shares shares | Dec. 31, 2025 USD ($) $ / shares shares | Feb. 20, 2026 USD ($) | Feb. 14, 2019 USD ($) | Jan. 15, 2019 USD ($) | Dec. 15, 2015 USD ($)
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |  |
Number of commercial real estate loans included in loan performance analytical model | loan |  | 125,000 |  |  |  |  |
Number of sub-servicers | sub-servicer |  | 2 |  |  |  |  |
Principal amount | $ |  | $ 500,000,000 | $ 500,000,000 |  |  |  |
Common stock, shares authorized (in shares) |  | 450,000,000 | 450,000,000 |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  | $ 0.01 | $ 0.01 |  |  |  |
Common stock, shares issued (in shares) |  | 52,439,463 | 52,399,265 |  |  |  |
Common stock, shares outstanding (in shares) |  | 52,439,463 | 52,399,265 |  |  |  |
Stock repurchase program, authorized amount | $ |  |  |  |  |  |  | $ 10,000,000
Preferred stock, shares authorized (in shares) |  | 50,000,000 | 50,000,000 |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  | $ 0.01 | $ 0.01 |  |  |  |
Preferred stock, shares issued (in shares) |  | 2,400,000 | 2,400,000 |  |  |  |
Preferred stock, dividend rate, percentage |  | 7.875% | 7.875% |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 2,400,000 | 2,400,000 |  |  |  |
REO Assets Held-for-Use | Minimum |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |  |
Estimated useful life |  | 7 years |  |  |  |  |
REO Assets Held-for-Use | Maximum |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |  |
Estimated useful life |  | 39 years |  |  |  |  |
Series A Cumulative Redeemable Preferred Stock |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) | 2,400,000 | 2,400,000 | 2,400,000 |  |  |  |
Preferred stock, dividend rate, percentage | 7.875% |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 2,400,000 | 2,400,000 |  |  |  |
Delayed Draw Facility | Credit Agreement |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |  |
Principal amount | $ |  | $ 50,000,000.0 | $ 47,750,000 | $ 2,300,000 | $ 40,250,000 | $ 40,250,000 |
Collateralized Loan Obligations |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |  |
Maximum exposure to loss from consolidated trusts | $ |  | $ 78,827,950 | $ 147,427,950 |  |  |  |

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