Quarterly report pursuant to Section 13 or 15(d)

DEBT OBLIGATIONS - Schedule of Debt Obligations (Details)

v3.19.2
DEBT OBLIGATIONS - Schedule of Debt Obligations (Details) - USD ($)
6 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Outstanding Face Amount $ 28,783,315,000  
Carrying Value $ 28,778,010,000 $ 22,656,235,000
Weighted Average Funding Cost 3.46%  
Weighted Average Life (Years) 24 days  
MSR purchase price holdback $ 61,953,000 49,352,000
UPB of Underlying Mortgages 74,500,000,000  
Agency RMBS | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 8,023,603,000  
Carrying Value $ 8,023,603,000 4,346,070,000
Weighted Average Funding Cost 2.60%  
Weighted Average Life (Years) 3 days  
Agency RMBS | Repurchase Agreements | Trade And Other Receivables    
Debt Instrument [Line Items]    
Collateral amount $ 5,300,000,000  
Agency RMBS | Repurchase Agreements | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 2 years 1 month 6 days  
Outstanding Face of Collateral $ 8,092,018,000  
Amortized Cost Basis of Collateral 8,270,539,000  
Carrying Value of Collateral 8,334,665,000  
Non-Agency RMBS | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 8,018,358,000  
Carrying Value $ 8,018,317,000 7,434,785,000
Weighted Average Funding Cost 3.42%  
Weighted Average Life (Years) 3 days  
Non-Agency RMBS | Repurchase Agreements | Retained Servicer Advance and Consumer Bonds    
Debt Instrument [Line Items]    
Carrying Value $ 136,400,000  
Non-Agency RMBS | Repurchase Agreements | Retainer Bonds Collateralized by Agency MSRs    
Debt Instrument [Line Items]    
Carrying Value $ 741,100,000  
Non-Agency RMBS | Repurchase Agreements | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years 6 months  
Outstanding Face of Collateral $ 20,457,734,000  
Amortized Cost Basis of Collateral 8,074,682,000  
Carrying Value of Collateral 8,733,701,000  
Residential Mortgage | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 5,365,278,000  
Carrying Value $ 5,364,296,000 3,678,246,000
Weighted Average Funding Cost 4.22%  
Weighted Average Life (Years) 21 days  
Residential Mortgage | Repurchase Agreements | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 14 years 9 months 18 days  
Outstanding Face of Collateral $ 5,905,393,000  
Amortized Cost Basis of Collateral 5,727,584,000  
Carrying Value of Collateral 5,721,192,000  
Residential Mortgage | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 980,613,000  
Carrying Value $ 983,367,000 122,465,000
Weighted Average Funding Cost 4.03%  
Weighted Average Life (Years) 3 years  
Residential Mortgage | Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 8 years 10 months 24 days  
Outstanding Face of Collateral $ 1,202,743,000  
Amortized Cost Basis of Collateral 1,170,746,000  
Carrying Value of Collateral 1,148,931,000  
Real Estate Owned | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 74,046,000  
Carrying Value $ 74,029,000 94,868,000
Weighted Average Funding Cost 4.46%  
Weighted Average Life (Years) 12 days  
Real Estate Owned | Repurchase Agreements | Collateral    
Debt Instrument [Line Items]    
Carrying Value of Collateral $ 79,406,000  
Real Estate Owned | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 1,981,000  
Carrying Value $ 1,981,000 2,480,000
Weighted Average Funding Cost 4.98%  
Weighted Average Life (Years) 24 days  
Real Estate Owned | Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Carrying Value of Collateral $ 1,387,000  
Total Repurchase Agreements | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 21,481,285,000  
Carrying Value $ 21,480,245,000 15,553,969,000
Weighted Average Funding Cost 3.32%  
Weighted Average Life (Years) 9 days  
MSR purchase price holdback $ 85,600,000  
Excess MSRs    
Debt Instrument [Line Items]    
Carrying Value 287,759,000 297,563,000
Excess MSRs | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 287,759,000  
Carrying Value $ 287,759,000 297,563,000
Weighted Average Funding Cost 5.25%  
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) 5 years 10 months 24 days  
Outstanding Face of Collateral $ 111,126,425,000  
Amortized Cost Basis of Collateral 332,488,000  
Carrying Value of Collateral 431,095,000  
MSRs | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 2,185,886,000  
Carrying Value $ 2,177,950,000 2,360,856,000
Weighted Average Funding Cost 4.32%  
Weighted Average Life (Years) 2 years 6 months  
MSRs | Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 5 years 9 months 18 days  
Outstanding Face of Collateral $ 429,678,985,000  
Amortized Cost Basis of Collateral 4,378,609,000  
Carrying Value of Collateral 4,826,580,000  
Servicer Advances    
Debt Instrument [Line Items]    
Carrying Value 2,978,590,000 3,382,455,000
Servicer Advances | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 2,980,954,000  
Carrying Value $ 2,978,590,000 3,382,455,000
Weighted Average Funding Cost 3.57%  
Weighted Average Life (Years) 1 year 7 months 6 days  
Face amount of debt at fixed rate $ 2,600,000,000  
Servicer Advances | Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Minimum    
Debt Instrument [Line Items]    
Variable interest rate spread 1.15%  
Servicer Advances | Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Maximum    
Debt Instrument [Line Items]    
Variable interest rate spread 2.15%  
Servicer Advances | Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 1 year 7 months 6 days  
Outstanding Face of Collateral $ 3,473,192,000  
Amortized Cost Basis of Collateral 3,661,779,000  
Carrying Value of Collateral 3,685,115,000  
Consumer Loans    
Debt Instrument [Line Items]    
Carrying Value 868,118,000 936,447,000
Consumer Loans | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 864,837,000  
Carrying Value $ 868,118,000 936,447,000
Weighted Average Funding Cost 3.23%  
Weighted Average Life (Years) 3 years 2 months 12 days  
Consumer Loans | Notes and Bonds Payable | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 3 years 8 months 12 days  
Outstanding Face of Collateral $ 937,497,000  
Amortized Cost Basis of Collateral 942,696,000  
Carrying Value of Collateral 938,821,000  
Total Notes Payable | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 7,302,030,000  
Carrying Value $ 7,297,765,000 $ 7,102,266,000
Weighted Average Funding Cost 3.88%  
Weighted Average Life (Years) 2 years 3 months 18 days  
Non-agency RMBS Repurchase Agreements, LIBOR Based Floating Interest Rate | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 7,417,600,000  
Non-agency RMBS Repurchase Agreements, Fixed Rate | Repurchase Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 600,700,000  
Corporate Note, LIBOR Based Floating Interest Rate | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount 187,800,000  
3.00% Secured Corporate Note | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 100,000,000.0  
3.00% Secured Corporate Note | Secured Debt | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Variable interest rate spread 3.00%  
2.50% Secured Corporate Note | Secured Debt | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Variable interest rate spread 2.50%  
2.25% Agency MSR Secured Note | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 675,200,000  
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%  
3.55% Corporate Note | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 1,510,700,000  
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 4620.00%  
2.88% Residential Mortgage Loans | Notes and Bonds Payable | Nationstar    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 6,300,000  
2.88% Residential Mortgage Loans | Notes and Bonds Payable | London Interbank Offered Rate (LIBOR) | Nationstar    
Debt Instrument [Line Items]    
Variable interest rate spread 2.88%  
Non-Agency RMBS | Notes and Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 113,900,000  
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 3.76%  
4.59% Asset-backed Notes | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 369,700,000  
Weighted Average Funding Cost 4.59%  
Asset-backed Notes, LIBOR Based Floating Interest Rate | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 494,600,000  
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]    
Interest rate, stated percentage 3.20%  
UPB of Underlying Mortgages $ 822,800,000  
Consumer Loan, UPB Class C-1 | Secured Debt    
Debt Instrument [Line Items]    
Interest rate, stated percentage 5.06%  
UPB of Underlying Mortgages $ 8,700,000  
4.00% Consumer Loans | Secured Debt    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 6,600,000  
Interest rate, stated percentage 4.00%