FAIR VALUE MEASUREMENT - Securities Valuation Methodology and Results (Details) $ in Thousands	12 Months Ended
Dec. 31, 2019 USD ($) source	Dec. 31, 2018 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Outstanding Face Amount	$ 36,159,591	$ 22,152,845
Amortized Cost Basis	18,782,175	11,212,428
Real estate and other securities, available-for-sale	$ 19,477,728	11,636,581
Number of broker quotation sources \| source	2
Percentage of instruments with ranges of assumptions used available	67.70%
Fair Value	$ 659,738
Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Outstanding Face Amount	11,301,603	2,613,395
Amortized Cost Basis	11,474,338	2,657,917
Real estate and other securities, available-for-sale	11,519,943	2,665,618
Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Outstanding Face Amount	24,857,988	19,539,450
Amortized Cost Basis	7,307,837	8,554,511
Real estate and other securities, available-for-sale	7,957,785	8,970,963
Fair Value	5,389,502
Multiple Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate and other securities, available-for-sale	19,473,516	11,625,463
Single Quote
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate and other securities, available-for-sale	4,212	11,118
Single Quote \| Seller
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate and other securities, available-for-sale	700	11,100
Level 2 \| Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate and other securities, available-for-sale	11,519,943	2,665,618
Level 2 \| Multiple Quotes \| Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate and other securities, available-for-sale	11,519,943	2,665,618
Level 2 \| Single Quote \| Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate and other securities, available-for-sale	0	0
Level 3 \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate and other securities, available-for-sale	7,957,785	8,970,963
Level 3 \| Multiple Quotes \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate and other securities, available-for-sale	7,953,573	8,959,845
Level 3 \| Single Quote \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate and other securities, available-for-sale	$ 4,212	$ 11,118
Discount Rate \| Minimum \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.0182
Discount Rate \| Maximum \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.1784
Prepayment Rate \| Minimum \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.005
Prepayment Rate \| Maximum \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.230
CDR \| Minimum \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.002
CDR \| Maximum \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.0700
Loss Severity \| Minimum \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.150
Loss Severity \| Maximum \| Non-Agency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	1

Fair Value Measurements, Percentage of Instruments with Ranges of Assumptions Used Available

No definition available.

Name:	nrz_FairValueMeasurementsPercentageofInstrumentswithRangesofAssumptionsUsedAvailable
Namespace Prefix:	nrz_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Broker Quotation Sources

+ References

No definition available.

+ Details

Name:	nrz_NumberOfBrokerQuotationSources
Namespace Prefix:	nrz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Value of input used to measure investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

For investments which are quantified by principal amount, the principle balance held at close of period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-12C.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010

+ Details

Name:	us-gaap_InvestmentOwnedBalancePrincipalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as available-for-sale.

+ References

No definition available.

+ Details

Name:	us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationTechniqueAxis=nrz_MultipleQuotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationTechniqueAxis=nrz_SingleQuoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=nrz_SellerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPrepaymentRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDefaultRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputLossSeverityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: