Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
EXCESS MORTGAGE SERVICING RIGHTS - Summary of Investments in Excess MSRs (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Servicing Assets at Fair Value [Line Items]      
Weighted Average Life (Years) 2 years 2 months 12 days    
Carrying Value $ 4,585,841 $ 5,686,233 $ 4,528,604
Changes in fair value recorded in other income (16,232) (10,505) $ (58,656)
Corporate Joint Venture | Servicer Advance Investments      
Servicing Assets at Fair Value [Line Items]      
UPB of Underlying Mortgages 26,061,499 31,442,267  
Excess MSRs      
Servicing Assets at Fair Value [Line Items]      
UPB of Underlying Mortgages 72,688,905 88,345,237  
Amortized Cost Basis 250,901 303,478  
Carrying Value 310,938 379,747  
Excess MSRs | Agency      
Servicing Assets at Fair Value [Line Items]      
UPB of Underlying Mortgages $ 34,593,406 $ 43,310,917  
Weighted Average Life (Years) 5 years 10 months 24 days 5 years 6 months  
Amortized Cost Basis $ 141,204 $ 178,603  
Carrying Value $ 162,645 $ 209,633  
Excess MSRs | Agency | Minimum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (32.50%) (3250.00%)  
Excess MSRs | Agency | Maximum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (66.70%) (66.70%)  
Excess MSRs | Agency | Weighted Average | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (53.30%) (53.30%)  
Excess MSRs | Agency | Fortress-managed funds | Minimum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR 0.00% 0.00%  
Excess MSRs | Agency | Fortress-managed funds | Maximum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (40.00%) (40.00%)  
Excess MSRs | Agency | Mr. Cooper | Minimum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (20.00%) (20.00%)  
Excess MSRs | Agency | Mr. Cooper | Maximum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (35.00%) (35.00%)  
Excess MSRs | Non-Agency      
Servicing Assets at Fair Value [Line Items]      
UPB of Underlying Mortgages $ 38,095,499 $ 45,034,320  
Weighted Average Life (Years) 6 years 6 months 6 years 6 months  
Amortized Cost Basis $ 109,697 $ 124,875  
Carrying Value $ 148,293 $ 170,114  
Excess MSRs | Non-Agency | Minimum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (33.30%) (3330.00%)  
Excess MSRs | Non-Agency | Maximum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (100.00%) (100.00%)  
Excess MSRs | Non-Agency | Weighted Average | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (59.40%) (59.40%)  
Excess MSRs | Non-Agency | Fortress-managed funds | Minimum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR 0.00% 0.00%  
Excess MSRs | Non-Agency | Fortress-managed funds | Maximum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (50.00%) (50.00%)  
Excess MSRs | Non-Agency | Mr. Cooper | Minimum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR 0.00% 0.00%  
Excess MSRs | Non-Agency | Mr. Cooper | Maximum | Original and Recaptured Pools      
Servicing Assets at Fair Value [Line Items]      
Interest in Excess MSR (33.30%) (33.30%)