Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Narrative (Details)

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INVESTMENTS IN MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Narrative (Details) - USD ($)
$ in Thousands
9 Months Ended
Jan. 18, 2018
Sep. 30, 2019
Aug. 06, 2019
May 21, 2019
Apr. 02, 2019
Feb. 28, 2019
Dec. 31, 2018
Sep. 30, 2018
Jan. 01, 2018
Jul. 23, 2017
Schedule of MSRs [Line Items]                    
Residential mortgage loans subject to repurchase   $ 168,532         $ 121,602 $ 110,181    
Residential mortgage loans, held-for-investment, at fair value   113,133         $ 121,088      
Ocwen                    
Schedule of MSRs [Line Items]                    
UPB of Underlying Mortgages                 $ 86,800,000 $ 110,000,000
Payments to acquire MSRs $ 279,600                  
Mortgage Loans Subserviced                    
Schedule of MSRs [Line Items]                    
UPB of Underlying Mortgages   54,700,000                
Subservicing revenue   $ 99,700                
PHH Mortgage Corporation                    
Schedule of MSRs [Line Items]                    
Subservicer percent of UPB   26.90%                
Nationstar                    
Schedule of MSRs [Line Items]                    
Subservicer percent of UPB   23.10%                
Nationstar | MSRs                    
Schedule of MSRs [Line Items]                    
UPB of Underlying Mortgages           $ 9,500,000        
LoanCare                    
Schedule of MSRs [Line Items]                    
Subservicer percent of UPB   19.20%                
AmeriHome                    
Schedule of MSRs [Line Items]                    
Subservicer percent of UPB   1.80%                
Flagstar Bank                    
Schedule of MSRs [Line Items]                    
Subservicer percent of UPB   0.80%                
Shellpoint Mortgage Servicing                    
Schedule of MSRs [Line Items]                    
Subservicer percent of UPB   28.20%                
Ocwen | New Residential Mortgage LLC | MSRs                    
Schedule of MSRs [Line Items]                    
Unpaid principal balance of underlying loans, transferred   $ 66,700,000                
United Shore | MSRs                    
Schedule of MSRs [Line Items]                    
UPB of Underlying Mortgages       $ 23,700,000 $ 8,200,000          
Quicken | MSRs                    
Schedule of MSRs [Line Items]                    
UPB of Underlying Mortgages     $ 29,100,000