Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details)

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FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]      
Assets measured at fair value on a nonrecurring basis $ 259,200 $ 259,200 $ 666,600
Broker price discount 10.00% 10.00%  
Notes payable $ 7,883,061 $ 7,883,061 2,908,763
Servicer Advances [Member]      
Schedule of Equity Method Investments [Line Items]      
Estimated fair value of note payable [1] 7,908,800 7,908,800  
Notes payable [1],[2] 7,883,100 7,883,100  
Residential Mortgage Loans [Member]      
Schedule of Equity Method Investments [Line Items]      
Assets measured at fair value on a nonrecurring basis 233,900 233,900 610,100
Real Estate Acquired in Satisfaction of Debt [Member]      
Schedule of Equity Method Investments [Line Items]      
Assets measured at fair value on a nonrecurring basis $ 25,300 25,300 $ 56,500
Loans Held-for-sale [Member]      
Schedule of Equity Method Investments [Line Items]      
Asset fair value reduction   2,700  
Real Estate Owned [Member]      
Schedule of Equity Method Investments [Line Items]      
Asset fair value reduction   $ 2,900  
MSRs [Member] | Excess MSRs Investees [Member]      
Schedule of Equity Method Investments [Line Items]      
Weighted average discount rate, used to value investments in excess MSRs 9.80% 9.80%  
[1] $3.1 billion face amount of the notes have a fixed rate while the remaining notes bear interest equal to the sum of (i) a floating rate index rate equal to one-month LIBOR or a cost of funds rate, as applicable, and (ii) a margin ranging from 1.0% to 2.0%.
[2] Net of deferred financing costs associated with the adoption of ASU No. 2015-03.