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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