MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Schedule of Carrying Value of Investments in MSRs and MSR Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]
Beginning balance	$ 4,585,841
Purchases, net	4,044
Transfers	0
Originations	255,473
Proceeds from sales	(1,793)
Amortization of servicing rights	(340,983)
Change in valuation inputs and assumptions	543,956
(Gain) loss realized	(1,199)
Ending balance	5,045,339
MSRs
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]
Proceeds from sales	(1,945)	$ (8,504)
MSRs
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]
Beginning balance	3,489,675
Purchases, net	4,044
Transfers	47,831
Originations	255,473
Proceeds from sales	(1,016)
Amortization of servicing rights	(319,029)
Change in valuation inputs and assumptions	547,510
(Gain) loss realized	(929)
Ending balance	4,023,559
New Residential Mortgage LLC \| Mortgage Servicing Rights Financing Receivable
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]
Beginning balance	1,096,166
Purchases, net	0
Transfers	(47,831)
Originations	0
Proceeds from sales	(777)
Amortization of servicing rights	(21,954)
Change in valuation inputs and assumptions	(3,554)	(33,610)
(Gain) loss realized	(270)
Ending balance	1,021,780
New Residential Mortgage LLC \| Mortgage Servicing Rights Financing Receivable \| MSRs
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]
Proceeds from sales	$ (1,047)	$ (3,708)

Amortization Of Mortgage Servicing Rights (MSRs), Excluding Excess Spread Financing

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- Definition

Gain (Loss) On Sale Of Mortgage Servicing Rights Financing Receivables

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- Definition

Mortgage Servicing Rights

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- Definition

Servicing Assets At Fair Value, Originations

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Servicing Assets At Fair Value, Transfers

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The cash inflow from the sale of servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. Rights may be obtained via (1) acquisition or assumption of a servicing obligation that does not relate to financial assets of the servicer or its consolidated affiliates; or (2) by originating mortgage loans and then (a) transferring the loans to a Variable Interest Entity (VIE) in a transaction that meets the necessary transfer and classification requirements, or (b) transferring the loans in a transaction that meets the requirements for sale accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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- Definition

The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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- Definition

Amount of increase (decrease) in fair value from changes in the inputs, assumptions, or model used to calculate the fair value of the contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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