XML 89 R87.htm IDEA: XBRL DOCUMENT v3.19.3

Fair Value of Financial Instruments - Narrative (Details) - Discount Rate	Sep. 30, 2019	Dec. 31, 2018
CMBS | Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Rate used to determine fair value		0.045
CMBS | Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Rate used to determine fair value		0.095
Distressed and other residential mortgage loans | Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Rate used to determine fair value	0.039
Distressed and other residential mortgage loans | Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Rate used to determine fair value	0.128

X

- 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

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

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
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_FinancialInstrumentAxis=nymt_DistressedAndOtherResidentialMortgageLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: