Quarterly report pursuant to Section 13 or 15(d)

DEBT OBLIGATIONS - Schedule of Debt Obligations - Carrying Value (Details)

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DEBT OBLIGATIONS - Schedule of Debt Obligations - Carrying Value (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Debt Instrument [Roll Forward]    
Beginning balance $ 13,181,236  
Borrowings 23,815,777 $ 12,605,745
Repayments (20,745,543) (12,026,068)
Capitalized deferred financing costs, net of amortization 6,800 $ 9,320
Ending balance 16,049,180  
Excess MSRs [Member]    
Debt Instrument [Roll Forward]    
Beginning balance 729,145  
Ending balance 764,601  
Mortgage Servicing Rights [Member]    
Debt Instrument [Roll Forward]    
Beginning balance 0  
Ending balance 923,336  
Servicer Advances [Member]    
Debt Instrument [Roll Forward]    
Beginning balance 5,549,872  
Ending balance 4,519,048  
Real Estate Securities [Member]    
Debt Instrument [Roll Forward]    
Beginning balance 4,419,002  
Ending balance 6,947,104  
Residential Mortgage Loans and REO [Member]    
Debt Instrument [Roll Forward]    
Beginning balance 783,006  
Ending balance 1,461,034  
Consumer Loans [Member]    
Debt Instrument [Roll Forward]    
Beginning balance 1,700,211  
Ending balance 1,434,057  
Repurchase Agreements [Member]    
Debt Instrument [Roll Forward]    
Borrowings 23,815,777  
Repayments (20,745,543)  
Capitalized deferred financing costs, net of amortization 534  
Repurchase Agreements [Member] | Excess MSRs [Member]    
Debt Instrument [Roll Forward]    
Borrowings 0  
Repayments 0  
Capitalized deferred financing costs, net of amortization 0  
Repurchase Agreements [Member] | Mortgage Servicing Rights [Member]    
Debt Instrument [Roll Forward]    
Borrowings 0  
Repayments 0  
Capitalized deferred financing costs, net of amortization 0  
Repurchase Agreements [Member] | Servicer Advances [Member]    
Debt Instrument [Roll Forward]    
Borrowings 0  
Repayments 0  
Capitalized deferred financing costs, net of amortization 0  
Repurchase Agreements [Member] | Real Estate Securities [Member]    
Debt Instrument [Roll Forward]    
Borrowings 22,878,951  
Repayments (20,350,849)  
Capitalized deferred financing costs, net of amortization 0  
Repurchase Agreements [Member] | Residential Mortgage Loans and REO [Member]    
Debt Instrument [Roll Forward]    
Borrowings 936,826  
Repayments (394,694)  
Capitalized deferred financing costs, net of amortization 534  
Repurchase Agreements [Member] | Consumer Loans [Member]    
Debt Instrument [Roll Forward]    
Borrowings 0  
Repayments 0  
Capitalized deferred financing costs, net of amortization 0  
Notes Payable [Member]    
Debt Instrument [Roll Forward]    
Borrowings 4,741,739  
Repayments (4,947,216)  
Capitalized deferred financing costs, net of amortization 1,929  
Discount on borrowings, net of amortization 724  
Notes Payable [Member] | Excess MSRs [Member]    
Debt Instrument [Roll Forward]    
Borrowings 1,150,000  
Repayments (1,115,811)  
Capitalized deferred financing costs, net of amortization 1,267  
Discount on borrowings, net of amortization 0  
Notes Payable [Member] | Mortgage Servicing Rights [Member]    
Debt Instrument [Roll Forward]    
Borrowings 925,187  
Repayments (973)  
Capitalized deferred financing costs, net of amortization (878)  
Discount on borrowings, net of amortization 0  
Notes Payable [Member] | Servicer Advances [Member]    
Debt Instrument [Roll Forward]    
Beginning balance 5,549,872  
Borrowings 2,528,353  
Repayments (3,560,473)  
Capitalized deferred financing costs, net of amortization 1,462  
Discount on borrowings, net of amortization (166)  
Ending balance 4,519,048  
Notes Payable [Member] | Real Estate Securities [Member]    
Debt Instrument [Roll Forward]    
Borrowings 0  
Repayments 0  
Capitalized deferred financing costs, net of amortization 0  
Discount on borrowings, net of amortization 0  
Notes Payable [Member] | Residential Mortgage Loans and REO [Member]    
Debt Instrument [Roll Forward]    
Borrowings 138,199  
Repayments (2,837)  
Capitalized deferred financing costs, net of amortization 0  
Discount on borrowings, net of amortization 0  
Notes Payable [Member] | Consumer Loans [Member]    
Debt Instrument [Roll Forward]    
Beginning balance 1,700,211  
Borrowings 0  
Repayments (267,122)  
Capitalized deferred financing costs, net of amortization 78  
Discount on borrowings, net of amortization 890  
Ending balance $ 1,434,057