Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN EXCESS MORTGAGE SERVICING RIGHTS - Summary of Direct Investments in Excess MSRs (Details)

v3.20.1
INVESTMENTS IN EXCESS MORTGAGE SERVICING RIGHTS - Summary of Direct Investments in Excess MSRs (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]      
Weighted Average Life (Years) 1 year 2 months 12 days    
Carrying Value $ 5,538,815   $ 5,686,233
Servicer Advance Investments | Servicer Advances      
Schedule of Equity Method Investments [Line Items]      
UPB of Underlying Mortgages 30,043,832   31,442,267
Original and Recaptured Pools      
Schedule of Equity Method Investments [Line Items]      
Original and Recaptured Pools (11,024) $ 4,627  
Excess MSRs      
Schedule of Equity Method Investments [Line Items]      
UPB of Underlying Mortgages $ 85,009,386    
Weighted Average Life (Years) 6 years 1 month 6 days    
Servicing Asset at Amortized Cost $ 298,686    
Carrying Value 363,932   379,747
Excess MSRs | Mr. Cooper      
Schedule of Equity Method Investments [Line Items]      
Carrying Value 361,882   377,692
Excess MSRs | Original and Recaptured Pools | Original and Recaptured Pools      
Schedule of Equity Method Investments [Line Items]      
UPB of Underlying Mortgages $ 41,702,867    
Weighted Average Life (Years) 5 years 8 months 12 days    
Servicing Asset at Amortized Cost $ 174,694    
Carrying Value $ 200,167   209,633
Excess MSRs | Original and Recaptured Pools | Original and Recaptured Pools | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 32.50%    
Excess MSRs | Original and Recaptured Pools | Original and Recaptured Pools | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 66.70%    
Excess MSRs | Original and Recaptured Pools | Original and Recaptured Pools | Weighted Average      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 53.30%    
Excess MSRs | Original and Recaptured Pools | Recapture Agreement | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 32.50%    
Excess MSRs | Original and Recaptured Pools | Recapture Agreement | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 66.70%    
Excess MSRs | Original and Recaptured Pools | Recapture Agreement | Weighted Average      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 53.30%    
Excess MSRs | Original and Recaptured Pools | Fortress-managed funds | Original and Recaptured Pools | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 20.00%    
Excess MSRs | Original and Recaptured Pools | Fortress-managed funds | Original and Recaptured Pools | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 35.00%    
Excess MSRs | Original and Recaptured Pools | Fortress-managed funds | Recapture Agreement | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 20.00%    
Excess MSRs | Original and Recaptured Pools | Fortress-managed funds | Recapture Agreement | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 35.00%    
Excess MSRs | Original and Recaptured Pools | Mr. Cooper | Original and Recaptured Pools | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 20.00%    
Excess MSRs | Original and Recaptured Pools | Mr. Cooper | Original and Recaptured Pools | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 35.00%    
Excess MSRs | Original and Recaptured Pools | Mr. Cooper | Recapture Agreement | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 20.00%    
Excess MSRs | Original and Recaptured Pools | Mr. Cooper | Recapture Agreement | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 35.00%    
Excess MSRs | Non-Agency | Original and Recaptured Pools      
Schedule of Equity Method Investments [Line Items]      
UPB of Underlying Mortgages $ 43,306,519    
Weighted Average Life (Years) 6 years 8 months 12 days    
Servicing Asset at Amortized Cost $ 123,992    
Carrying Value $ 163,765   $ 170,114
Excess MSRs | Non-Agency | Original and Recaptured Pools | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 33.30%    
Excess MSRs | Non-Agency | Original and Recaptured Pools | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 100.00%    
Excess MSRs | Non-Agency | Original and Recaptured Pools | Weighted Average      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 59.40%    
Excess MSRs | Non-Agency | Recapture Agreement | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 33.30%    
Excess MSRs | Non-Agency | Recapture Agreement | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 100.00%    
Excess MSRs | Non-Agency | Recapture Agreement | Weighted Average      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 59.40%    
Excess MSRs | Non-Agency | Fortress-managed funds | Original and Recaptured Pools | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 0.00%    
Excess MSRs | Non-Agency | Fortress-managed funds | Original and Recaptured Pools | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 33.00%    
Excess MSRs | Non-Agency | Fortress-managed funds | Recapture Agreement | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 0.00%    
Excess MSRs | Non-Agency | Fortress-managed funds | Recapture Agreement | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 33.00%    
Excess MSRs | Non-Agency | Mr. Cooper | Original and Recaptured Pools | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 0.00%    
Excess MSRs | Non-Agency | Mr. Cooper | Original and Recaptured Pools | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 33.30%    
Excess MSRs | Non-Agency | Mr. Cooper | Recapture Agreement | Minimum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 0.00%    
Excess MSRs | Non-Agency | Mr. Cooper | Recapture Agreement | Maximum      
Schedule of Equity Method Investments [Line Items]      
Interest in Excess MSR 33.30%