XML 72 R63.htm IDEA: XBRL DOCUMENT
v3.23.3

Multi-family Loans, at Fair Value - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Loan premiums, early redemption | $ 128,000 | $ 1,356,000 | $ 315,000 | $ 3,839,000
Multi-family loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Unrealized gains (losses) | (16,800) | (2,500,000) | 900,000 | (3,000,000)
Loan premiums, early redemption | $ 0 | $ 7,100 | $ 200,000 | $ 1,000,000

X
- Definition Loan Premiums, Loans and Preferred Equity and Mezzanine Loans, Early Redemption + References No definition available. + Details
Name: | nymt_LoanPremiumsLoansAndPreferredEquityAndMezzanineLoansEarlyRedemption
Namespace Prefix: | nymt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unrealized Gain (Loss) Loans and Preferred Equity + References No definition available. + Details
Name: | nymt_UnrealizedGainLossLoansandPreferredEquityandMezzanineLoans
Namespace Prefix: | nymt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 29 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 948 -SubTopic 310 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479851/948-310-S99-1 + Details
Name: | srt_MortgageLoansOnRealEstateLineItems
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=nymt_MezzanineLoanandPreferredEquityInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |