INVESTMENTS IN MORTGAGE SERVICING RIGHTS AND MORTGAGE SERVICING RIGHTS FINANCING RECEIVABLES - Rollforward of Carrying Value of Investments In MSRs (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Mortgage Servicing Rights Financing Receivable [Roll Forward]
Beginning balance	$ 0
Ending balance	598,728	$ 0
MSRs
Mortgage Servicing Rights [Roll Forward]
Beginning balance	659,483	0
Purchases	1,143,693	571,158
Amortization of servicing rights	(223,167)	(15,354)
Change in valuation inputs and assumptions	155,495	103,679
Ending balance	1,735,504	659,483
Mortgage Servicing Rights Financing Receivable [Roll Forward]
Investments made	1,143,693	571,158
Amortization of servicing rights	(223,167)	(15,354)
Change in valuation inputs and assumptions	(155,495)	(103,679)
Mortgage Servicing Rights Financing Receivable \| MSRs
Mortgage Servicing Rights Financing Receivable [Roll Forward]
Ending balance	598,728
Mortgage Servicing Rights Financing Receivable \| New Residential Mortgage LLC \| MSRs
Mortgage Servicing Rights [Roll Forward]
Purchases	467,884
Amortization of servicing rights	(43,190)
Change in valuation inputs and assumptions	109,584
Mortgage Servicing Rights Financing Receivable [Roll Forward]
Beginning balance	0
Investments made	467,884
Ocwen Transaction	64,450
Amortization of servicing rights	(43,190)
Change in valuation inputs and assumptions	(109,584)
Ending balance	$ 598,728	$ 0

Mortgage Servicing Rights, Additional Transactions

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Mortgage Servicing Rights Financing Receivable [Roll Forward]

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Mortgage Servicing Rights, Financing Receivable, at Fair Value

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- Definition

Mortgage Servicing Rights

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- Definition

The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized 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. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 4
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122739-111746

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(4)(i)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

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