Quarterly report pursuant to Section 13 or 15(d)

DEBT OBLIGATIONS - Schedule of Debt Obligations (Details)

v3.20.1
DEBT OBLIGATIONS - Schedule of Debt Obligations (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Outstanding Face Amount $ 17,843,669,000  
Carrying Value $ 17,828,709,000 $ 35,636,373,000
Weighted Average Funding Cost 2.92%  
Weighted Average Life (Years) 1 year 2 months 12 days  
MSR purchase price holdback $ 37,585,000 68,668,000
Agency RMBS | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 302,508,000  
Carrying Value $ 302,508,000 15,481,677,000
Weighted Average Funding Cost 1.68%  
Weighted Average Life (Years) 2 hours  
Agency RMBS | Repurchase Agreements | Trade And Other Receivables    
Debt Instrument [Line Items]    
Collateral amount $ 2,900,000,000  
Agency RMBS | Repurchase Agreements | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years 9 months 18 days  
Outstanding Face of Collateral $ 306,566,000  
Amortized Cost Basis of Collateral 308,486,000  
Carrying Value of Collateral 318,567,000  
Non-Agency RMBS | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 6,131,955,000  
Carrying Value $ 6,131,955,000 7,317,519,000
Weighted Average Funding Cost 2.77%  
Weighted Average Life (Years) 3 days  
Non-Agency RMBS | Repurchase Agreements | Trade And Other Receivables    
Debt Instrument [Line Items]    
Collateral amount $ 3,300,000,000  
Non-Agency RMBS | Repurchase Agreements | Retained Servicer Advance and Consumer Bonds    
Debt Instrument [Line Items]    
Carrying Value 7,500,000  
Non-Agency RMBS | Repurchase Agreements | Retainer Bonds Collateralized by Agency MSRs    
Debt Instrument [Line Items]    
Carrying Value $ 533,300,000  
Non-Agency RMBS | Repurchase Agreements | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 2 years 9 months 18 days  
Outstanding Face of Collateral $ 25,071,311,000  
Amortized Cost Basis of Collateral 6,413,847,000  
Carrying Value of Collateral 5,389,267,000  
Non-Agency RMBS | Repurchase Agreements | Collateral | Retained Servicer Advance and Consumer Bonds    
Debt Instrument [Line Items]    
Carrying Value 10,000,000.0  
Non-Agency RMBS | Repurchase Agreements | Collateral | Retainer Bonds Collateralized by Agency MSRs    
Debt Instrument [Line Items]    
Carrying Value 697,600,000  
Residential Mortgage | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 4,311,309,000  
Carrying Value $ 4,309,869,000 5,053,207,000
Weighted Average Funding Cost 2.70%  
Weighted Average Life (Years) 24 days  
Residential Mortgage | Repurchase Agreements | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 12 years 4 months 24 days  
Outstanding Face of Collateral $ 5,003,435,000  
Amortized Cost Basis of Collateral 5,411,739,000  
Carrying Value of Collateral 4,612,611,000  
Residential Mortgage | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 431,953,000  
Carrying Value $ 428,218,000 864,451,000
Weighted Average Funding Cost 4.68%  
Weighted Average Life (Years) 8 years 4 months 24 days  
Residential Mortgage | Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 4 years 7 months 6 days  
Outstanding Face of Collateral $ 685,168,000  
Amortized Cost Basis of Collateral 987,623,000  
Carrying Value of Collateral 633,205,000  
Real Estate Owned | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 69,798,000  
Carrying Value $ 69,798,000 63,822,000
Weighted Average Funding Cost 2.70%  
Weighted Average Life (Years) 21 days  
Real Estate Owned | Repurchase Agreements | Collateral    
Debt Instrument [Line Items]    
Carrying Value of Collateral $ 88,221,000  
Total Repurchase Agreements | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 10,815,570,000  
Carrying Value $ 10,814,130,000 27,916,225,000
Weighted Average Funding Cost 2.71%  
Weighted Average Life (Years) 12 days  
MSR purchase price holdback $ 80,400,000  
Excess MSRs    
Debt Instrument [Line Items]    
Carrying Value 308,800,000 217,300,000
Excess MSRs | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 308,800,000  
Carrying Value $ 308,800,000 217,300,000
Weighted Average Funding Cost 4.29%  
Weighted Average Life (Years) 2 years 2 months 12 days  
Excess MSRs | Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years 1 month 6 days  
Outstanding Face of Collateral $ 94,182,895,000  
Amortized Cost Basis of Collateral 302,878,000  
Carrying Value of Collateral 377,649,000  
MSRs | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 2,546,879,000  
Carrying Value $ 2,541,089,000 2,640,036,000
Weighted Average Funding Cost 3.76%  
Weighted Average Life (Years) 1 year 4 months 24 days  
MSRs | Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 5 years 9 months 18 days  
Outstanding Face of Collateral $ 424,610,405,000  
Amortized Cost Basis of Collateral 4,450,640,000  
Carrying Value of Collateral 4,603,915,000  
Servicer Advances    
Debt Instrument [Line Items]    
Carrying Value 2,969,209,000 3,181,672,000
Servicer Advances | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 2,976,208,000  
Carrying Value $ 2,969,209,000 3,181,672,000
Weighted Average Funding Cost 2.49%  
Weighted Average Life (Years) 2 years  
Face amount of debt at fixed rate $ 1,900,000,000  
Servicer Advances | Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Minimum    
Debt Instrument [Line Items]    
Variable interest rate spread 1.00%  
Servicer Advances | Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Maximum    
Debt Instrument [Line Items]    
Variable interest rate spread 1.98%  
Servicer Advances | Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 1 year 6 months  
Outstanding Face of Collateral $ 3,388,387,000  
Amortized Cost Basis of Collateral 3,582,852,000  
Carrying Value of Collateral 3,588,437,000  
Consumer Loans    
Debt Instrument [Line Items]    
Carrying Value 767,263,000 816,689,000
Consumer Loans | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 764,259,000  
Carrying Value $ 767,263,000 816,689,000
Weighted Average Funding Cost 3.26%  
Weighted Average Life (Years) 3 years 10 months 24 days  
Consumer Loans | Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 3 years 10 months 24 days  
Outstanding Face of Collateral $ 764,960,000  
Amortized Cost Basis of Collateral 772,715,000  
Carrying Value of Collateral 774,527,000  
Total Notes Payable | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 7,028,099,000  
Carrying Value $ 7,014,579,000 $ 7,720,148,000
Weighted Average Funding Cost 3.25%  
Weighted Average Life (Years) 2 years 4 months 24 days  
Non-agency RMBS Repurchase Agreements, LIBOR Based Floating Interest Rate | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 5,615,000,000.0  
Non-agency RMBS Repurchase Agreements, Fixed Rate | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 517,000,000.0  
2.50% Secured Corporate Note | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 91,500,000  
2.50% Secured Corporate Note | Secured Debt | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Variable interest rate spread 2.50%  
2.75% Secured Corporate Note | Secured Debt | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 217,300,000  
Variable interest rate spread 2.75%  
2.25% Agency MSR Secured Note | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 1,232,800,000  
2.25% Agency MSR Secured Note | Secured Debt | London Interbank Offered Rate (LIBOR) | Minimum    
Debt Instrument [Line Items]    
Variable interest rate spread 2.25%  
2.25% Agency MSR Secured Note | Secured Debt | London Interbank Offered Rate (LIBOR) | Maximum    
Debt Instrument [Line Items]    
Variable interest rate spread 2.75%  
2.50% Agency MSR Secured Note | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 56,900,000  
2.50% Agency MSR Secured Note | Secured Debt | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Variable interest rate spread 2.50%  
3.55% Corporate Note | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 1,257,200,000  
3.55% Corporate Note | Secured Debt | London Interbank Offered Rate (LIBOR) | Minimum    
Debt Instrument [Line Items]    
Variable interest rate spread 3.55%  
3.55% Corporate Note | Secured Debt | London Interbank Offered Rate (LIBOR) | Maximum    
Debt Instrument [Line Items]    
Variable interest rate spread 4.62%  
2.88% Residential Mortgage Loans | Notes and Bonds Payable | Mr. Cooper    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 5,000,000.0  
Collateral amount $ 1,500,000  
2.88% Residential Mortgage Loans | Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Mr. Cooper    
Debt Instrument [Line Items]    
Variable interest rate spread 2.88%  
6.58% Assetbacked Notes | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 176,100,000  
Weighted Average Funding Cost 6.60%  
Non-Agency RMBS | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 99,900,000  
Non-Agency RMBS | Notes and Bonds Payable | Minimum    
Debt Instrument [Line Items]    
Weighted Average Funding Cost 3.50%  
Non-Agency RMBS | Notes and Bonds Payable | Maximum    
Debt Instrument [Line Items]    
Weighted Average Funding Cost 3.75%  
Asset-backed Notes, LIBOR Based Floating Interest Rate | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 150,900,000  
Collateral amount $ 1,200,000  
Asset-backed Notes, LIBOR Based Floating Interest Rate | Secured Debt | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Variable interest rate spread 1.25%  
Consumer Loan, UPB Class A | Secured Debt    
Debt Instrument [Line Items]    
UPB of Underlying Mortgages $ 685,100,000  
Interest rate, stated percentage 3.20%  
Consumer Loan, UPB Class B | Secured Debt    
Debt Instrument [Line Items]    
UPB of Underlying Mortgages $ 70,400,000  
Interest rate, stated percentage 3.58%  
Consumer Loan, UPB Class C-1 | Secured Debt    
Debt Instrument [Line Items]    
UPB of Underlying Mortgages $ 8,700,000  
Interest rate, stated percentage 5.06%