Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENT - Financial Assets Measured at Fair Value on a Recurring Basis using Level 3 Inputs (Details)

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FAIR VALUE MEASUREMENT - Financial Assets Measured at Fair Value on a Recurring Basis using Level 3 Inputs (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Non-Agency    
Gains (losses) included in net income    
Included in gain (loss) on settlement of investments, net $ (600)  
Excess MSRs Investees    
Purchases, sales and repayments    
New Residential’s ownership 50.00% 50.00%
Recurring Basis | Level 3    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning $ 13,681,878  
Transfers from Level 3 0  
Transfers to Level 3 0  
Gains (losses) included in net income    
Included in other-than-temporary impairment (''OTTI'') on securities (14,224)  
Included in change in fair value of investments in excess mortgage servicing rights (50,967)  
Included in change in fair value of investments in excess mortgage servicing rights, equity method investees 2,228  
Included in servicing revenue, net 61,859  
Included in change in fair value of investments in mortgage servicing rights financing receivables(D) 151,973  
Included in change in fair value of servicer advance investments (81,228)  
Included in gain (loss) on settlement of investments, net 112,358  
Included in other income (loss), net 8,264  
Gains (losses) included in other comprehensive income 85,132  
Interest income 210,472  
Purchases, sales and repayments    
Purchases 3,098,910  
Proceeds from sales (68,966)  
Proceeds from repayments (1,886,053)  
New Ocwen Agreements (Note 5) (2,823,412)  
Balance, ending 12,488,224  
Recurring Basis | Level 3 | Servicer Advances    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning 4,027,379  
Transfers from Level 3 0  
Transfers to Level 3 0  
Gains (losses) included in net income    
Included in other-than-temporary impairment (''OTTI'') on securities 0  
Included in change in fair value of investments in excess mortgage servicing rights 0  
Included in change in fair value of investments in excess mortgage servicing rights, equity method investees 0  
Included in servicing revenue, net 0  
Included in change in fair value of investments in mortgage servicing rights financing receivables(D) 0  
Included in change in fair value of servicer advance investments (81,228)  
Included in gain (loss) on settlement of investments, net 72,585  
Included in other income (loss), net 0  
Gains (losses) included in other comprehensive income 0  
Interest income 31,381  
Purchases, sales and repayments    
Purchases 1,340,237  
Proceeds from sales 0  
Proceeds from repayments (1,344,078)  
New Ocwen Agreements (Note 5) (3,202,838)  
Balance, ending 843,438  
Recurring Basis | Level 3 | MSRs    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning 1,735,504  
Transfers from Level 3 0  
Transfers to Level 3 0  
Gains (losses) included in net income    
Included in other-than-temporary impairment (''OTTI'') on securities 0  
Included in change in fair value of investments in excess mortgage servicing rights 0  
Included in change in fair value of investments in excess mortgage servicing rights, equity method investees 0  
Included in servicing revenue, net 61,859  
Included in change in fair value of investments in mortgage servicing rights financing receivables(D) 0  
Included in change in fair value of servicer advance investments 0  
Included in gain (loss) on settlement of investments, net 0  
Included in other income (loss), net 0  
Gains (losses) included in other comprehensive income 0  
Interest income 0  
Purchases, sales and repayments    
Purchases 434,763  
Proceeds from sales 0  
Proceeds from repayments 0  
New Ocwen Agreements (Note 5) 0  
Balance, ending 2,232,126  
Recurring Basis | Level 3 | Mortgage Servicing Rights Financing Receivable    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning 598,728  
Transfers from Level 3 0  
Transfers to Level 3 0  
Gains (losses) included in net income    
Included in other-than-temporary impairment (''OTTI'') on securities 0  
Included in change in fair value of investments in excess mortgage servicing rights 0  
Included in change in fair value of investments in excess mortgage servicing rights, equity method investees 0  
Included in servicing revenue, net 0  
Included in change in fair value of investments in mortgage servicing rights financing receivables(D) 151,973  
Included in change in fair value of servicer advance investments 0  
Included in gain (loss) on settlement of investments, net 0  
Included in other income (loss), net 0  
Gains (losses) included in other comprehensive income 0  
Interest income 0  
Purchases, sales and repayments    
Purchases 138,993  
Proceeds from sales (2,768)  
Proceeds from repayments 0  
New Ocwen Agreements (Note 5) 1,017,993  
Balance, ending 1,904,919  
Recurring Basis | Level 3 | Non-Agency    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning 5,974,789  
Transfers from Level 3 0  
Transfers to Level 3 0  
Gains (losses) included in net income    
Included in other-than-temporary impairment (''OTTI'') on securities (14,224)  
Included in change in fair value of investments in excess mortgage servicing rights 0  
Included in change in fair value of investments in excess mortgage servicing rights, equity method investees 0  
Included in servicing revenue, net 0  
Included in change in fair value of investments in mortgage servicing rights financing receivables(D) 0  
Included in change in fair value of servicer advance investments 0  
Included in gain (loss) on settlement of investments, net (644)  
Included in other income (loss), net 4,804  
Gains (losses) included in other comprehensive income 85,132  
Interest income 158,348  
Purchases, sales and repayments    
Purchases 1,184,917  
Proceeds from sales (66,198)  
Proceeds from repayments (473,516)  
New Ocwen Agreements (Note 5) 0  
Balance, ending 6,853,408  
Recurring Basis | Level 3 | MSRs Agency    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning 324,636  
Transfers from Level 3 0  
Transfers to Level 3 0  
Gains (losses) included in net income    
Included in other-than-temporary impairment (''OTTI'') on securities 0  
Included in change in fair value of investments in excess mortgage servicing rights (7,617)  
Included in change in fair value of investments in excess mortgage servicing rights, equity method investees 0  
Included in servicing revenue, net 0  
Included in change in fair value of investments in mortgage servicing rights financing receivables(D) 0  
Included in change in fair value of servicer advance investments 0  
Included in gain (loss) on settlement of investments, net 0  
Included in other income (loss), net 3,288  
Gains (losses) included in other comprehensive income 0  
Interest income 10,415  
Purchases, sales and repayments    
Purchases 0  
Proceeds from sales 0  
Proceeds from repayments (31,151)  
New Ocwen Agreements (Note 5) 0  
Balance, ending 299,571  
Recurring Basis | Level 3 | MSRs Agency | Excess MSRs Investees    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning 171,765  
Transfers from Level 3 0  
Transfers to Level 3 0  
Gains (losses) included in net income    
Included in other-than-temporary impairment (''OTTI'') on securities 0  
Included in change in fair value of investments in excess mortgage servicing rights 0  
Included in change in fair value of investments in excess mortgage servicing rights, equity method investees 2,228  
Included in servicing revenue, net 0  
Included in change in fair value of investments in mortgage servicing rights financing receivables(D) 0  
Included in change in fair value of servicer advance investments 0  
Included in gain (loss) on settlement of investments, net 0  
Included in other income (loss), net 0  
Gains (losses) included in other comprehensive income 0  
Interest income 0  
Purchases, sales and repayments    
Purchases 0  
Proceeds from sales 0  
Proceeds from repayments (14,959)  
New Ocwen Agreements (Note 5) 0  
Balance, ending 159,034  
Recurring Basis | Level 3 | MSRs Non-Agency    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning 849,077  
Transfers from Level 3 0  
Transfers to Level 3 0  
Gains (losses) included in net income    
Included in other-than-temporary impairment (''OTTI'') on securities 0  
Included in change in fair value of investments in excess mortgage servicing rights (43,350)  
Included in change in fair value of investments in excess mortgage servicing rights, equity method investees  
Included in servicing revenue, net 0  
Included in change in fair value of investments in mortgage servicing rights financing receivables(D) 0  
Included in change in fair value of servicer advance investments  
Included in gain (loss) on settlement of investments, net 40,417  
Included in other income (loss), net 172  
Gains (losses) included in other comprehensive income 0  
Interest income 10,328  
Purchases, sales and repayments    
Purchases 0  
Proceeds from sales 0  
Proceeds from repayments (22,349)  
New Ocwen Agreements (Note 5) (638,567)  
Balance, ending $ 195,728