XML 117 R108.htm IDEA: XBRL DOCUMENT v3.23.2

Fair Value of Financial Instruments - Schedule of Quantitative Information Regarding Significant and Unobservable Inputs Used in the Valuation of Level 3 Assets and Liabilities Measured at Fair Value (Details)	6 Months Ended
	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Consolidated SLST CDOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	$ 617,168,000	$ 634,495,000
Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	617,168,000	634,495,000
Consolidated SLST | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Variable interest entity, primary beneficiary, maximum loss exposure, amount	170,000,000	191,500,000
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, at fair value	3,136,812,000
Fair Value	168,755,000	179,746,000
Level 3 | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	617,168,000	$ 634,495,000
Level 3 | Valuation Technique, Discounted Cash Flow | Equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value	143,755,000
Level 3 | Valuation Technique, Discounted Cash Flow | Equity investments in disposal group held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value	$ 7,695,000
Level 3 | Loss severity | Valuation Technique, Discounted Cash Flow | Weighted Average | Equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	0
Level 3 | Loss severity | Valuation Technique, Discounted Cash Flow | Weighted Average | Equity investments in disposal group held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	0
Level 3 | Discount rate | Valuation Technique, Discounted Cash Flow | Weighted Average | Equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	0.136
Level 3 | Discount rate | Valuation Technique, Discounted Cash Flow | Weighted Average | Equity investments in disposal group held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	0.160
Level 3 | Discount rate | Valuation Technique, Discounted Cash Flow | Minimum | Equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	0.130
Level 3 | Discount rate | Valuation Technique, Discounted Cash Flow | Minimum | Equity investments in disposal group held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	0.160
Level 3 | Discount rate | Valuation Technique, Discounted Cash Flow | Maximum | Equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	0.155
Level 3 | Discount rate | Valuation Technique, Discounted Cash Flow | Maximum | Equity investments in disposal group held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	0.160
Level 3 | Months to assumed redemption | Valuation Technique, Discounted Cash Flow | Weighted Average | Equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	21
Level 3 | Months to assumed redemption | Valuation Technique, Discounted Cash Flow | Weighted Average | Equity investments in disposal group held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	15
Level 3 | Months to assumed redemption | Valuation Technique, Discounted Cash Flow | Minimum | Equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	1
Level 3 | Months to assumed redemption | Valuation Technique, Discounted Cash Flow | Minimum | Equity investments in disposal group held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	15
Level 3 | Months to assumed redemption | Valuation Technique, Discounted Cash Flow | Maximum | Equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	57
Level 3 | Months to assumed redemption | Valuation Technique, Discounted Cash Flow | Maximum | Equity investments in disposal group held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity method investment, measurement input	15
Level 3 | Residential loans and residential loans held in securitization trusts | Valuation Technique, Discounted Cash Flow
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, at fair value	$ 2,121,820,000
Level 3 | Residential loans and residential loans held in securitization trusts | Valuation Technique, Liquidation Model
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, at fair value	$ 225,023,000
Level 3 | Residential loans and residential loans held in securitization trusts | Lifetime CPR | Valuation Technique, Discounted Cash Flow | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.047
Level 3 | Residential loans and residential loans held in securitization trusts | Lifetime CPR | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0
Level 3 | Residential loans and residential loans held in securitization trusts | Lifetime CPR | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.363
Level 3 | Residential loans and residential loans held in securitization trusts | Lifetime CDR | Valuation Technique, Discounted Cash Flow | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.008
Level 3 | Residential loans and residential loans held in securitization trusts | Lifetime CDR | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0
Level 3 | Residential loans and residential loans held in securitization trusts | Lifetime CDR | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.355
Level 3 | Residential loans and residential loans held in securitization trusts | Loss severity | Valuation Technique, Discounted Cash Flow | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.138
Level 3 | Residential loans and residential loans held in securitization trusts | Loss severity | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0
Level 3 | Residential loans and residential loans held in securitization trusts | Loss severity | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	1.000
Level 3 | Residential loans and residential loans held in securitization trusts | Yield | Valuation Technique, Discounted Cash Flow | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.078
Level 3 | Residential loans and residential loans held in securitization trusts | Yield | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.056
Level 3 | Residential loans and residential loans held in securitization trusts | Yield | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.478
Level 3 | Residential loans and residential loans held in securitization trusts | Yield | Valuation Technique, Liquidation Model | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.076
Level 3 | Residential loans and residential loans held in securitization trusts | Yield | Valuation Technique, Liquidation Model | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.069
Level 3 | Residential loans and residential loans held in securitization trusts | Yield | Valuation Technique, Liquidation Model | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.289
Level 3 | Residential loans and residential loans held in securitization trusts | Annual home price appreciation/(depreciation) | Valuation Technique, Liquidation Model | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.001
Level 3 | Residential loans and residential loans held in securitization trusts | Annual home price appreciation/(depreciation) | Valuation Technique, Liquidation Model | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	(0.016)
Level 3 | Residential loans and residential loans held in securitization trusts | Annual home price appreciation/(depreciation) | Valuation Technique, Liquidation Model | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input	0.037
Level 3 | Residential loans and residential loans held in securitization trusts | Liquidation timeline (months) | Valuation Technique, Liquidation Model | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input, liquidation timeline (in months)	18 years
Level 3 | Residential loans and residential loans held in securitization trusts | Liquidation timeline (months) | Valuation Technique, Liquidation Model | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input, liquidation timeline (in months)	2 years
Level 3 | Residential loans and residential loans held in securitization trusts | Liquidation timeline (months) | Valuation Technique, Liquidation Model | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, measurement input, liquidation timeline (in months)	54 years
Level 3 | Residential loans and residential loans held in securitization trusts | Property value | Valuation Technique, Liquidation Model | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, at fair value	$ 2,329,886
Level 3 | Residential loans and residential loans held in securitization trusts | Property value | Valuation Technique, Liquidation Model | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, at fair value	15,300
Level 3 | Residential loans and residential loans held in securitization trusts | Property value | Valuation Technique, Liquidation Model | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, at fair value	13,800,000
Level 3 | Multi-family loans | Valuation Technique, Discounted Cash Flow
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Multi-family loans	$ 97,422,000
Level 3 | Multi-family loans | Loss severity | Valuation Technique, Discounted Cash Flow | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0
Level 3 | Multi-family loans | Discount rate | Valuation Technique, Discounted Cash Flow | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.125
Level 3 | Multi-family loans | Discount rate | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.110
Level 3 | Multi-family loans | Discount rate | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, measurement input	0.205
Level 3 | Multi-family loans | Months to assumed redemption | Valuation Technique, Discounted Cash Flow | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, assumed redemption period (in months)	31 years
Level 3 | Multi-family loans | Months to assumed redemption | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, assumed redemption period (in months)	4 years
Level 3 | Multi-family loans | Months to assumed redemption | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial instruments owned, assumed redemption period (in months)	58 years
Level 3 | Consolidated SLST | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Residential mortgage loans, at fair value	$ 789,969,000
Variable interest entity, primary beneficiary, maximum loss exposure, amount	170,000,000
Level 3 | Consolidated SLST | Valuation Technique, Discounted Cash Flow | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	$ 617,168,000
Level 3 | Consolidated SLST | Loss severity | Valuation Technique, Discounted Cash Flow | Weighted Average | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.215
Level 3 | Consolidated SLST | Loss severity | Valuation Technique, Discounted Cash Flow | Minimum | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.021
Level 3 | Consolidated SLST | Loss severity | Valuation Technique, Discounted Cash Flow | Maximum | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.263
Level 3 | Consolidated SLST | Yield | Valuation Technique, Discounted Cash Flow | Weighted Average | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.056
Level 3 | Consolidated SLST | Yield | Valuation Technique, Discounted Cash Flow | Minimum | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.048
Level 3 | Consolidated SLST | Yield | Valuation Technique, Discounted Cash Flow | Maximum | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.100
Level 3 | Consolidated SLST | Collateral prepayment rate | Valuation Technique, Discounted Cash Flow | Weighted Average | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.059
Level 3 | Consolidated SLST | Collateral prepayment rate | Valuation Technique, Discounted Cash Flow | Minimum | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.027
Level 3 | Consolidated SLST | Collateral prepayment rate | Valuation Technique, Discounted Cash Flow | Maximum | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.068
Level 3 | Consolidated SLST | Collateral default rate | Valuation Technique, Discounted Cash Flow | Weighted Average | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.014
Level 3 | Consolidated SLST | Collateral default rate | Valuation Technique, Discounted Cash Flow | Minimum | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0
Level 3 | Consolidated SLST | Collateral default rate | Valuation Technique, Discounted Cash Flow | Maximum | Consolidated SLST CDOs | VIE, Primary Beneficiary
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt, measurement input	0.101

X

- Definition

Equity Method Investment, Measurement Input

+ References

No definition available.

+ Details

Name:	nymt_EquityMethodInvestmentMeasurementInput
Namespace Prefix:	nymt_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Financial Instruments Owned, Measurement Input

+ References

No definition available.

+ Details

Name:	nymt_FinancialInstrumentsOwnedMeasurementInput
Namespace Prefix:	nymt_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Financial Instruments Owned, Measurement Input, Assumed Redemption Period

+ References

No definition available.

+ Details

Name:	nymt_FinancialInstrumentsOwnedMeasurementInputAssumedRedemptionPeriod
Namespace Prefix:	nymt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Financial Instruments Owned, Multi-family Loans

+ References

No definition available.

+ Details

Name:	nymt_FinancialInstrumentsOwnedMultiFamilyLoans
Namespace Prefix:	nymt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Residential Mortgage Loans, Fair Value Disclosure

+ References

No definition available.

+ Details

Name:	nymt_ResidentialMortgageLoansFairValueDisclosure
Namespace Prefix:	nymt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Residential Mortgage Loans, Measurement Input

+ References

No definition available.

+ Details

Name:	nymt_ResidentialMortgageLoansMeasurementInput
Namespace Prefix:	nymt_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Residential Mortgage Loans, Measurement Input, Liquidation Timeline, Period

+ References

No definition available.

+ Details

Name:	nymt_ResidentialMortgageLoansMeasurementInputLiquidationTimelinePeriod
Namespace Prefix:	nymt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value portion of investments accounted under the equity method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2E

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(12))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

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

X

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

X

- Definition

Value of input used to measure long-term debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

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

X

- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

+ Details

Name:	us-gaap_SecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of maximum exposure to loss from involvement with consolidated variable interest entity (VIE).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481203/810-10-50-5A

+ Details

Name:	us-gaap_VariableInterestEntityPrimaryBeneficiaryMaximumLossExposureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=nymt_ResidentialCollateralizedDebtObligationsAtFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=nymt_ConsolidatedSLSTMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=nymt_ResidentialLoansandResidentialLoansHeldinSecuritizationTrustsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=nymt_MultiFamilyLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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