Quarterly report pursuant to Section 13 or 15(d)

DEBT OBLIGATIONS - Schedule of Debt Obligations (Details)

v3.7.0.1
DEBT OBLIGATIONS - Schedule of Debt Obligations (Details) - USD ($)
6 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Outstanding Face Amount $ 16,069,475,000  
Balance Outstanding $ 16,049,180,000 $ 13,181,236,000
Weighted Average Funding Cost 3.05%  
Weighted Average Life (Years) 1 year 3 months 18 days  
Interest payable $ 30,230,000 23,108,000
Servicer Advances [Member]    
Debt Instrument [Line Items]    
Balance Outstanding 4,519,048,000 5,549,872,000
Consumer Loans [Member]    
Debt Instrument [Line Items]    
Balance Outstanding 1,434,057,000 1,700,211,000
Repurchase Agreements [Member] | Agency RMBS [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 2,720,413,000  
Balance Outstanding $ 2,720,413,000 1,764,760,000
Weighted Average Funding Cost 1.14%  
Weighted Average Life (Years) 1 month 6 days  
Repurchase Agreements [Member] | Agency RMBS [Member] | Trade And Other Receivables [Member]    
Debt Instrument [Line Items]    
Collateral amount $ 2,700,000,000  
Repurchase Agreements [Member] | Agency RMBS [Member] | Collateral [Member]    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 3 months 18 days  
Outstanding Face of Collateral $ 2,727,477,000  
Amortized Cost Basis of Collateral 2,805,774,000  
Carrying Value of Collateral 2,808,860,000  
Repurchase Agreements [Member] | Non-Agency RMBS [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 4,226,691,000  
Balance Outstanding $ 4,226,691,000 2,654,242,000
Weighted Average Funding Cost 2.68%  
Weighted Average Life (Years) 1 month 6 days  
Repurchase Agreements [Member] | Non-Agency RMBS [Member] | Collateral [Member]    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 8 years  
Outstanding Face of Collateral $ 10,947,964,000  
Amortized Cost Basis of Collateral 5,069,675,000  
Carrying Value of Collateral 5,382,793,000  
Repurchase Agreements [Member] | Residential Mortgage [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 1,213,786,000  
Balance Outstanding $ 1,211,460,000 686,412,000
Weighted Average Funding Cost 3.88%  
Weighted Average Life (Years) 6 months  
Repurchase Agreements [Member] | Residential Mortgage [Member] | Collateral [Member]    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 3 years 9 months 18 days  
Outstanding Face of Collateral $ 1,811,738,000  
Amortized Cost Basis of Collateral 1,581,267,000  
Carrying Value of Collateral 1,563,004,000  
Repurchase Agreements [Member] | Real Estate Owned [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 103,031,000  
Balance Outstanding $ 102,834,000 85,217,000
Weighted Average Funding Cost 3.88%  
Weighted Average Life (Years) 4 months 24 days  
Repurchase Agreements [Member] | Real Estate Owned [Member] | Collateral [Member]    
Debt Instrument [Line Items]    
Carrying Value of Collateral $ 137,402,000  
Repurchase Agreements [Member] | Total Repurchase Agreements [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 8,263,921,000  
Balance Outstanding $ 8,261,398,000 5,190,631,000
Weighted Average Funding Cost 2.36%  
Weighted Average Life (Years) 2 months 12 days  
Interest payable $ 17,600,000  
Notes Payable [Member] | Residential Mortgage [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 144,562,000  
Balance Outstanding $ 144,562,000 8,271,000
Weighted Average Funding Cost 3.60%  
Weighted Average Life (Years) 2 years 8 months 12 days  
Notes Payable [Member] | Residential Mortgage [Member] | Collateral [Member]    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 7 years 6 months  
Outstanding Face of Collateral $ 237,605,000  
Amortized Cost Basis of Collateral 186,261,000  
Carrying Value of Collateral 186,261,000  
Notes Payable [Member] | Real Estate Owned [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 2,178,000  
Balance Outstanding $ 2,178,000 3,106,000
Weighted Average Funding Cost 3.74%  
Weighted Average Life (Years) 3 months 18 days  
Notes Payable [Member] | Real Estate Owned [Member] | Collateral [Member]    
Debt Instrument [Line Items]    
Carrying Value of Collateral $ 2,815,000  
Notes Payable [Member] | Secured Corporate Note [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 768,443,000  
Balance Outstanding $ 764,601,000 729,145,000
Weighted Average Funding Cost 5.69%  
Weighted Average Life (Years) 1 year 9 months 18 days  
Notes Payable [Member] | Secured Corporate Note [Member] | Collateral [Member]    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years 1 month 6 days  
Outstanding Face of Collateral $ 275,957,786,000  
Amortized Cost Basis of Collateral 1,195,335,000  
Carrying Value of Collateral 1,339,563,000  
Notes Payable [Member] | Full MSRs [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 924,214,000  
Balance Outstanding $ 923,336,000 0
Weighted Average Funding Cost 5.23%  
Weighted Average Life (Years) 2 years 10 months 24 days  
Notes Payable [Member] | Full MSRs [Member] | Collateral [Member]    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years 9 months 18 days  
Outstanding Face of Collateral $ 191,111,797,000  
Amortized Cost Basis of Collateral 1,647,679,000  
Carrying Value of Collateral 1,836,451,000  
Notes Payable [Member] | Servicer Advances [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 4,528,323,000  
Balance Outstanding $ 4,519,048,000 5,549,872,000
Weighted Average Funding Cost 3.28%  
Weighted Average Life (Years) 2 years 3 months 18 days  
Face amount of debt at fixed rate $ 4,100,000,000  
Notes Payable [Member] | Servicer Advances [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 1.90%  
Notes Payable [Member] | Servicer Advances [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 2.40%  
Notes Payable [Member] | Servicer Advances [Member] | Collateral [Member]    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 5 years  
Outstanding Face of Collateral $ 4,562,746,000  
Amortized Cost Basis of Collateral 4,905,989,000  
Carrying Value of Collateral 4,984,475,000  
Notes Payable [Member] | Consumer Loans [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 1,437,834,000  
Balance Outstanding $ 1,434,057,000 1,700,211,000
Weighted Average Funding Cost 3.37%  
Weighted Average Life (Years) 3 years  
Notes Payable [Member] | Consumer Loans [Member] | Collateral [Member]    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 3 years 7 months 6 days  
Outstanding Face of Collateral $ 1,576,163,000  
Amortized Cost Basis of Collateral 1,574,459,000  
Carrying Value of Collateral 1,569,217,000  
Notes Payable [Member] | Total Notes Payable [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount 7,805,554,000  
Balance Outstanding $ 7,787,782,000 $ 7,990,605,000
Weighted Average Funding Cost 3.77%  
Weighted Average Life (Years) 2 years 6 months  
Notes Payable [Member] | 3.60% Residential Mortgage Asset-backed Notes [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 138,100,000  
Interest rate, stated percentage 3.60%  
Secured Debt [Member] | 4.75% Secured Corporate Note [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 213,300,000  
Secured Debt [Member] | 4.75% Secured Corporate Note [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 4.75%  
Secured Debt [Member] | 4.25% Secured Corporate Note [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 270,000,000  
Secured Debt [Member] | 4.25% Secured Corporate Note [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 4.25%  
Secured Debt [Member] | 5.68% Secured Corporate Note [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 285,100,000  
Interest rate, stated percentage 5.683%  
Secured Debt [Member] | 4.25% Agency MSR Secured Note [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 290,000,000  
Secured Debt [Member] | 4.25% Agency MSR Secured Note [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 4.25%  
Secured Debt [Member] | 3.75% Agency MSR Secured Note [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 60,000,000  
Secured Debt [Member] | 3.75% Agency MSR Secured Note [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 3.75%  
Secured Debt [Member] | 3.65% Agency MSR Secured Note [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 74,000,000  
Secured Debt [Member] | 3.65% Agency MSR Secured Note [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 3.65%  
Secured Debt [Member] | 4.00% Agency MSR Secured Note [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 500,200,000  
Secured Debt [Member] | 4.00% Agency MSR Secured Note [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 4.00%  
Secured Debt [Member] | Consumer Loan, UPB Class A [Member]    
Debt Instrument [Line Items]    
UPB of Underlying Mortgages $ 1,100,000,000  
Interest rate, stated percentage 3.05%  
Secured Debt [Member] | Consumer Loan, UPB Class B [Member]    
Debt Instrument [Line Items]    
UPB of Underlying Mortgages $ 210,800,000  
Interest rate, stated percentage 4.10%  
Secured Debt [Member] | Consumer Loan, UPB Class C-1 [Member]    
Debt Instrument [Line Items]    
UPB of Underlying Mortgages $ 18,300,000  
Interest rate, stated percentage 5.63%  
Secured Debt [Member] | Consumer Loan, UPB Class C-2 [Member]    
Debt Instrument [Line Items]    
UPB of Underlying Mortgages $ 18,300,000  
Interest rate, stated percentage 5.63%  
Secured Debt [Member] | 3.25% Consumer Loans [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 96,400,000  
Secured Debt [Member] | 3.25% Consumer Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 3.25%  
Retained Servicer Advance and Consumer Bonds [Member] | Repurchase Agreements [Member] | Non-Agency RMBS [Member]    
Debt Instrument [Line Items]    
Balance Outstanding $ 159,900,000  
Nationstar [Member] | Notes Payable [Member] | 2.875% Residential Mortgage Loans [Member]    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 8,700,000  
Nationstar [Member] | Notes Payable [Member] | 2.875% Residential Mortgage Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 2.875%