Quarterly report pursuant to Section 13 or 15(d)

DEBT OBLIGATIONS - Schedule of Debt Obligations (Details)

v3.21.2
DEBT OBLIGATIONS - Schedule of Debt Obligations (Details) - USD ($)
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Outstanding Face Amount $ 31,033,899,000  
Carrying Value $ 31,008,077,000 $ 25,191,875,000
Weighted Average Funding Cost 1.72%  
Weighted Average Life (Years) 1 year 1 month 6 days  
MSR purchase price holdback $ 45,983,000 44,623,000
Margin receivable, net 388,528,000 271,753,000
Secured Notes and Bonds Payable | Mr. Cooper    
Debt Instrument [Line Items]    
Outstanding Face Amount 5,800,000  
Secured Financing Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 22,763,086,000  
Carrying Value $ 22,759,985,000 17,547,680,000
Weighted Average Funding Cost 1.31%  
Weighted Average Life (Years) 6 months  
MSR purchase price holdback $ 65,700,000  
Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 8,270,813,000  
Carrying Value $ 8,248,092,000 7,644,195,000
Weighted Average Funding Cost 2.87%  
Weighted Average Life (Years) 2 years 8 months 12 days  
Real Estate Owned    
Debt Instrument [Line Items]    
Weighted Average Funding Cost 2.91%  
Warehouse Credit Facilities-Residential Mortgage Loans | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 12,923,024,000  
Carrying Value $ 12,919,922,000 4,039,564,000
Weighted Average Funding Cost 2.01%  
Weighted Average Life (Years) 9 months 18 days  
Repurchase agreements $ 266,400,000  
Interest rate 4.00%  
Warehouse Credit Facilities-Residential Mortgage Loans | Repurchase Agreements | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 23 years 10 months 24 days  
Outstanding Face of Collateral $ 13,774,859,000  
Amortized Cost Basis of Collateral 13,775,860,000  
Carrying Value of Collateral 13,803,756,000  
Agency RMBS | Repurchase Agreements    
Debt Instrument [Line Items]    
Margin receivable, net 341,800,000  
Agency RMBS | Secured Financing Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 8,956,064,000  
Carrying Value $ 8,956,064,000 12,682,427,000
Weighted Average Funding Cost 0.16%  
Weighted Average Life (Years) 1 month 6 days  
Agency RMBS | Secured Financing Agreements | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years 7 months 6 days  
Outstanding Face of Collateral $ 8,876,431,000  
Amortized Cost Basis of Collateral 9,158,455,000  
Carrying Value of Collateral 9,321,370,000  
Non-Agency RMBS | Repurchase Agreements | Retained Servicer Advance and Consumer Bonds    
Debt Instrument [Line Items]    
Carrying Value 12,300,000  
Non-Agency RMBS | Repurchase Agreements    
Debt Instrument [Line Items]    
Margin receivable, net 2,400,000  
Non-Agency RMBS | Repurchase Agreements | Collateral | Retained Servicer Advance and Consumer Bonds    
Debt Instrument [Line Items]    
Carrying Value 16,500,000  
Non-Agency RMBS | Secured Financing Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 723,486,000  
Carrying Value $ 723,486,000 817,209,000
Weighted Average Funding Cost 2.52%  
Weighted Average Life (Years) 0 years  
Non-Agency RMBS | Secured Financing Agreements | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 3 years 3 months 18 days  
Outstanding Face of Collateral $ 13,927,317,000  
Amortized Cost Basis of Collateral 905,336,000  
Carrying Value of Collateral 987,803,000  
Real Estate Owned | Secured Financing Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 160,512,000  
Carrying Value $ 160,513,000 8,480,000
Weighted Average Life (Years) 1 year 2 months 12 days  
Real Estate Owned | Secured Financing Agreements | Single Family Rental Collateralized Notes    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 152,600,000  
Real Estate Owned | Secured Financing Agreements | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 4 years 6 months  
Amortized Cost Basis of Collateral $ 230,128,000  
Carrying Value of Collateral 224,580,000  
Excess MSRs    
Debt Instrument [Line Items]    
Carrying Value 248,061,000 275,088,000
Excess MSRs | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 248,061,000  
Carrying Value $ 248,061,000 275,088,000
Weighted Average Funding Cost 3.74%  
Weighted Average Life (Years) 3 years 10 months 24 days  
Excess MSRs | Secured Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years 3 months 18 days  
Outstanding Face of Collateral $ 84,829,582,000  
Amortized Cost Basis of Collateral 281,142,000  
Carrying Value of Collateral 348,080,000  
MSRs | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 3,629,810,000  
Carrying Value $ 3,617,850,000 2,691,791,000
Weighted Average Funding Cost 3.69%  
Weighted Average Life (Years) 3 years 2 months 12 days  
MSRs | Secured Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years 1 month 6 days  
Outstanding Face of Collateral $ 531,851,913,000  
Amortized Cost Basis of Collateral 6,029,066,000  
Carrying Value of Collateral 6,477,289,000  
Servicer Advance Investments | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 381,286,000  
Carrying Value $ 380,420,000 423,144,000
Weighted Average Funding Cost 1.30%  
Weighted Average Life (Years) 1 year 1 month 6 days  
Servicer Advance Investments | Secured Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years  
Outstanding Face of Collateral $ 408,085,000  
Amortized Cost Basis of Collateral 453,442,000  
Carrying Value of Collateral $ 472,004,000  
Servicer Advances | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Minimum    
Debt Instrument [Line Items]    
Variable interest rate spread 1.10%  
Servicer Advances | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Maximum    
Debt Instrument [Line Items]    
Variable interest rate spread 1.90%  
Servicer Advances | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 2,347,819,000  
Carrying Value $ 2,342,335,000 2,585,575,000
Weighted Average Funding Cost 2.34%  
Weighted Average Life (Years) 1 year 4 months 24 days  
Face amount of debt at fixed rate $ 1,800,000,000  
Servicer Advances | Secured Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 8 months 12 days  
Outstanding Face of Collateral $ 2,796,796,000  
Amortized Cost Basis of Collateral 2,782,622,000  
Carrying Value of Collateral 2,782,622,000  
Residential Mortgage Loans | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 1,170,838,000  
Carrying Value $ 1,162,080,000 1,039,838,000
Weighted Average Funding Cost 2.10%  
Weighted Average Life (Years) 3 years 7 months 6 days  
Residential Mortgage Loans | Secured Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 20 years  
Outstanding Face of Collateral $ 1,192,146,000  
Amortized Cost Basis of Collateral 1,311,940,000  
Carrying Value of Collateral 1,313,998,000  
Consumer Loans    
Debt Instrument [Line Items]    
Carrying Value 497,346,000 628,759,000
Consumer Loans | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 492,999,000  
Carrying Value $ 497,346,000 $ 628,759,000
Weighted Average Funding Cost 2.04%  
Weighted Average Life (Years) 3 years 7 months 6 days  
Consumer Loans | Secured Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 3 years 3 months 18 days  
Outstanding Face of Collateral $ 485,966,000  
Amortized Cost Basis of Collateral 496,573,000  
Carrying Value of Collateral 547,548,000  
3.7% Secured Corporate Note | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 248,100,000  
3.7% Secured Corporate Note | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Variable interest rate spread 3.70%  
2.8% To 4.5% Agency MSR Secured Note And Bond Payable | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 1,300,000,000  
2.8% To 4.5% Agency MSR Secured Note And Bond Payable | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Minimum    
Debt Instrument [Line Items]    
Variable interest rate spread 2.80%  
2.8% To 4.5% Agency MSR Secured Note And Bond Payable | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Maximum    
Debt Instrument [Line Items]    
Variable interest rate spread 4.50%  
3.9% Agency MSR | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Variable interest rate spread 3.90%  
3.9% Agency MSR | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 99,900,000  
3.0% To 5.4% Public Notes | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 2,200,000,000  
3.0% To 5.4% Public Notes | Secured Notes and Bonds Payable | Minimum    
Debt Instrument [Line Items]    
Interest rate 3.00%  
3.0% To 5.4% Public Notes | Secured Notes and Bonds Payable | Maximum    
Debt Instrument [Line Items]    
Interest rate 5.40%  
2.9% Residential Mortgage Loans | Secured Notes and Bonds Payable | Mr. Cooper    
Debt Instrument [Line Items]    
Collateral amount $ 1,600,000  
2.9% Residential Mortgage Loans | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Mr. Cooper    
Debt Instrument [Line Items]    
Variable interest rate spread 2.90%  
3.8% Asset-Backed Notes | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 30,400,000  
3.8% Asset-Backed Notes | Secured Notes and Bonds Payable | Maximum    
Debt Instrument [Line Items]    
Weighted Average Funding Cost 3.80%  
6.6% Asset-Backed Notes | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 46,500,000  
Interest rate 6.60%  
3.6% To 5.00% Asset-Backed Notes | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 232,200,000  
3.6% To 5.00% Asset-Backed Notes | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Minimum    
Debt Instrument [Line Items]    
Variable interest rate spread 3.60%  
3.6% To 5.00% Asset-Backed Notes | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Maximum    
Debt Instrument [Line Items]    
Variable interest rate spread 5.00%  
2.8% Asset-Backed Notes | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 105,800,000  
Interest rate 2.75%  
Revolving Warehouse Facility Backed Notes | Secured Notes and Bonds Payable | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Variable interest rate spread 1.13%  
Revolving Warehouse Facility Backed Notes | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 750,000,000  
Consumer Loan, UPB Class A | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Interest rate 2.00%  
Residential mortgage loan UPB $ 440,000,000  
Consumer Loan, UPB Class B | Secured Notes and Bonds Payable    
Debt Instrument [Line Items]    
Interest rate 2.70%  
Residential mortgage loan UPB $ 53,000,000