Quarterly report pursuant to Section 13 or 15(d)

DEBT OBLIGATIONS - Carrying Value of Debt Obligations (Details)

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DEBT OBLIGATIONS - Carrying Value of Debt Obligations (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Debt Instrument [Roll Forward]    
Beginning balance $ 15,746,530  
Borrowings 63,696,426 $ 36,713,743
Repayments (58,414,966) $ (34,057,218)
Ending balance 21,641,966  
Excess MSRs    
Debt Instrument [Roll Forward]    
Beginning balance 483,978  
Ending balance 297,563  
MSRs    
Debt Instrument [Roll Forward]    
Beginning balance 1,157,179  
Ending balance 2,441,750  
Servicer Advances    
Debt Instrument [Roll Forward]    
Beginning balance 4,060,156  
Ending balance 3,385,842  
Real Estate Securities    
Debt Instrument [Roll Forward]    
Beginning balance 6,694,454  
Ending balance 11,591,577  
Residential Mortgage Loans and REO    
Debt Instrument [Roll Forward]    
Beginning balance 2,108,007  
Ending balance 2,920,626  
Consumer Loans    
Debt Instrument [Roll Forward]    
Beginning balance 1,242,756  
Ending balance 1,004,608  
Repurchase Agreements    
Debt Instrument [Roll Forward]    
Borrowings 64,136,058  
Repayments (58,411,583)  
Capitalized deferred financing costs, net of amortization 406  
Repurchase Agreements | Excess MSRs    
Debt Instrument [Roll Forward]    
Borrowings 0  
Repayments 0  
Capitalized deferred financing costs, net of amortization 0  
Repurchase Agreements | MSRs    
Debt Instrument [Roll Forward]    
Borrowings 0  
Repayments 0  
Capitalized deferred financing costs, net of amortization 0  
Repurchase Agreements | Servicer Advances    
Debt Instrument [Roll Forward]    
Borrowings 0  
Repayments 0  
Capitalized deferred financing costs, net of amortization 0  
Repurchase Agreements | Real Estate Securities    
Debt Instrument [Roll Forward]    
Borrowings 59,467,769  
Repayments (54,570,418)  
Capitalized deferred financing costs, net of amortization (228)  
Repurchase Agreements | Residential Mortgage Loans and REO    
Debt Instrument [Roll Forward]    
Borrowings 4,668,289  
Repayments (3,841,165)  
Capitalized deferred financing costs, net of amortization 634  
Repurchase Agreements | Consumer Loans    
Debt Instrument [Roll Forward]    
Borrowings 0  
Repayments 0  
Capitalized deferred financing costs, net of amortization 0  
Notes Payable    
Debt Instrument [Roll Forward]    
Borrowings 7,688,974  
Repayments (7,512,484)  
Discount on borrowings, net of amortization 1,220  
Unrealized gain on notes, fair value (900)  
Capitalized deferred financing costs, net of amortization (6,255)  
Notes Payable | Excess MSRs    
Debt Instrument [Roll Forward]    
Beginning balance 483,978  
Borrowings 240,000  
Repayments (426,440)  
Discount on borrowings, net of amortization 0  
Unrealized gain on notes, fair value 0  
Capitalized deferred financing costs, net of amortization 25  
Ending balance 297,563  
Notes Payable | MSRs    
Debt Instrument [Roll Forward]    
Borrowings 3,543,776  
Repayments (2,251,280)  
Discount on borrowings, net of amortization 0  
Unrealized gain on notes, fair value 0  
Capitalized deferred financing costs, net of amortization (7,925)  
Notes Payable | Servicer Advances    
Debt Instrument [Roll Forward]    
Beginning balance 4,060,156  
Borrowings 3,784,496  
Repayments (4,460,114)  
Discount on borrowings, net of amortization 33  
Unrealized gain on notes, fair value 0  
Capitalized deferred financing costs, net of amortization 1,271  
Ending balance 3,385,842  
Notes Payable | Real Estate Securities    
Debt Instrument [Roll Forward]    
Borrowings 0  
Repayments 0  
Discount on borrowings, net of amortization 0  
Unrealized gain on notes, fair value 0  
Capitalized deferred financing costs, net of amortization 0  
Notes Payable | Residential Mortgage Loans and REO    
Debt Instrument [Roll Forward]    
Borrowings 120,702  
Repayments (134,941)  
Discount on borrowings, net of amortization 0  
Unrealized gain on notes, fair value (900)  
Capitalized deferred financing costs, net of amortization 0  
Notes Payable | Consumer Loans    
Debt Instrument [Roll Forward]    
Beginning balance 1,242,756  
Borrowings 0  
Repayments (239,709)  
Discount on borrowings, net of amortization 1,187  
Unrealized gain on notes, fair value 0  
Capitalized deferred financing costs, net of amortization 374  
Ending balance 1,004,608  
Shellpoint Acquisition | Repurchase Agreements    
Debt Instrument [Roll Forward]    
Borrowings $ 639,000