Quarterly report pursuant to Section 13 or 15(d)

DEBT OBLIGATIONS - Schedule of Debt Obligations (Footnote) (Details)

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DEBT OBLIGATIONS - Schedule of Debt Obligations (Footnote) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Accrued interest payable $ 19,988 $ 18,268
Trade and Other Receivables [Member]    
Debt Instrument [Line Items]    
Collateral amount 1,500,000  
Repurchase Agreements [Member] | Total Repurchase Agreements [Member]    
Debt Instrument [Line Items]    
Accrued interest payable $ 6,700  
Repurchase Agreements [Member] | Consumer Loan Investment [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 3.50%  
Collateral percentage 56.00%  
Notes Payable [Member] | Residential Mortgage [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 2.875%  
Notes Payable [Member] | Secured Corporate Note [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 5.25%  
Notes Payable [Member] | Servicer Advances [Member]    
Debt Instrument [Line Items]    
Face amount of debt at fixed rate $ 2,700,000  
Notes Payable [Member] | Servicer Advances [Member] | LIBOR [Member] | Lower Range [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 1.73036%  
Notes Payable [Member] | Servicer Advances [Member] | LIBOR [Member] | Upper Range [Member]    
Debt Instrument [Line Items]    
Variable interest rate spread 2.20483%  
Secured Debt [Member]    
Debt Instrument [Line Items]    
Redemption rate 100.00%  
Secured Debt [Member] | UPB Class A Notes, 2.7%, Matures May 2023 [Member]    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 850,200  
Interest rate 2.70%  
Specified call premium percentage 1.00%  
Secured Debt [Member] | UPB Class B Notes, 4.61%, Matures October 2027 [Member]    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 427,000  
Interest rate 4.61%  
Specified call premium percentage 0.75%  
Secured Debt [Member] | UPB Class C Notes, 5.59%, Matures October 2033 [Member]    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 331,200  
Interest rate 5.59%  
Specified call premium percentage 1.00%  
Secured Debt [Member] | UPB Class D Notes, 6.82%, Matures April 2034 [Member]    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 199,800  
Interest rate 6.82%  
Specified call premium percentage 2.00%  
Collateral [Member] | Repurchase Agreements [Member] | Non-Agency RMBS [Member]    
Debt Instrument [Line Items]    
Repurchase agreements $ 145,800