XML 78 R63.htm IDEA: XBRL DOCUMENT v3.10.0.1

Residential Mortgage Loans Held in Securitization Trusts, Net and Real Estate Owned - Narrative (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Allowance for loan losses	$ 3,759,000	$ 4,191,000	$ 3,782,000	$ 3,399,000
Allowance for loan losses, basis points	6.25%	5.41%
Real estate owned held in residential securitization trusts	$ 0	$ 118,000
CDOs outstanding	4,800,000	$ 4,400,000
Principal amount of loans subject to delinquent principal or interest	$ 151,591,000
Residential Mortgage Loans Held in Securitization Trusts and Real Estate Owned Held in Residential Securitization
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of delinquent loans | loan	19	26
Principal amount of loans subject to delinquent principal or interest	$ 10,900,000	$ 16,500,000
Payment Deferral | Residential Mortgage Loans Held in Securitization Trusts and Real Estate Owned Held in Residential Securitization
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal amount of loans subject to delinquent principal or interest	$ 6,600,000	$ 10,200,000
Delinquent loans under modified payment plan (as a percent)	61.00%	62.00%

X

- Definition

Represents Company’s net investment in the residential securitization trusts, which is the maximum amount of the Company’s investment that is at risk to loss and represents the difference between (i) the carrying amount of the mortgage loans and real estate owned held in residential securitization trusts and (ii) the amount of Residential CDOs outstanding.

+ References

No definition available.

+ Details

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

X

- Definition

Represents allowance for loan losses expressed as basis points of the outstanding principal balance of residential loans held in securitization trusts.

+ References

No definition available.

+ Details

Name:	nymt_FinancingReceivableAllowanceForCreditLossesBasisPoints
Namespace Prefix:	nymt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the percentage of delinquent loans that are currently under some form of modified payment plan.

+ References

No definition available.

+ Details

Name:	nymt_ModifiedPercent
Namespace Prefix:	nymt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The aggregate number of delinquent loans.

+ References

No definition available.

+ Details

Name:	nymt_NumberOfDelinquentLoans
Namespace Prefix:	nymt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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:	srt_MortgageLoansOnRealEstateLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of principal due on delinquent mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column H
-Subsection 29

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column H))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

Name:	srt_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans
Namespace Prefix:	srt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

+ Details

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

X

- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5162-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4437-111522

+ Details

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

X

- Details

Name:	srt_MortgageLoansOnRealEstateLoanTypeAxis=nymt_ResidentialMortgageLoansHeldInSecuritizationTrustsAndRealEstateOwnedHeldInResidentialSecuritizationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PaymentDeferralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: