Annual report pursuant to Section 13 and 15(d)

TRANSACTIONS WITH AFFILIATES AND AFFILIATED ENTITIES - Narrative (Details)

v3.20.4
TRANSACTIONS WITH AFFILIATES AND AFFILIATED ENTITIES - Narrative (Details)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
May 19, 2020
USD ($)
$ / shares
shares
Mar. 31, 2020
USD ($)
purchaser
Feb. 28, 2019
shares
Jan. 31, 2018
shares
Dec. 31, 2020
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
Related Party Transaction [Line Items]            
Management agreement, renewal term (in years)         1 year  
Termination fee, number of months' pay (in months)         12 months  
Proportion of directors' votes needed to terminate         0.6667  
Number of purchasers | purchaser   6        
Owned mortgages, mortgage-based and asset-backed securities at fair value   $ 6,100.0        
Proceeds from sale of mortgage-backed securities   3,300.0        
Options granted (in shares) | shares         1,619,739 6,352,000
Common stock, par value (in dollars per share) | $ / shares $ 0.01       $ 0.01 $ 0.01
Share-based Payment Arrangement, Nonemployee            
Related Party Transaction [Line Items]            
Options granted (in shares) | shares     4,600,000 2,900,000    
Warrant | Share-based Payment Arrangement, Nonemployee            
Related Party Transaction [Line Items]            
Options granted (in shares) | shares 43,400,000       43,400,000  
Percentage of lenders and recipients managed by an affiliate of the manager 0.48          
2020 Term Loan            
Related Party Transaction [Line Items]            
Debt instrument, term 3 years          
Principal amount $ 600.0          
Fortress Purchaser            
Related Party Transaction [Line Items]            
Owned mortgages, mortgage-based and asset-backed securities at fair value   1,850.0        
Payments to acquire mortgage-backed securities   $ 1,000.0        
Manager            
Related Party Transaction [Line Items]            
Management fee rate (percent)         1.50%  
Incentive compensation percentage         25.00%  
Interest rate for incentive compensation         10.00%