Quarterly report pursuant to Section 13 or 15(d)

EXCESS MORTGAGE SERVICING RIGHTS ASSETS - Summary of Excess MSRs Made Through Equity Method Investees (Details)

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EXCESS MORTGAGE SERVICING RIGHTS ASSETS - Summary of Excess MSRs Made Through Equity Method Investees (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Schedule of Investments in Mortgage Servicing Rights [Line Items]    
Weighted Average Life (Years) 1 year 1 month 6 days  
Excess MSRs Investees    
Schedule of Investments in Mortgage Servicing Rights [Line Items]    
New Residential Interest in Investees 50.00% 50.00%
Excess MSRs Investees | Agency    
Schedule of Investments in Mortgage Servicing Rights [Line Items]    
New Residential Interest in Investees 50.00%  
Excess MSRs Investees | Agency | Agency    
Schedule of Investments in Mortgage Servicing Rights [Line Items]    
Unpaid Principal Balance $ 24,230,726  
Investee Interest in Excess MSR 66.70%  
New Residential Interest in Investees 50.00%  
Amortized Cost Basis $ 119,814  
Carrying Value $ 158,916  
Weighted Average Life (Years) 5 years 8 months 12 days