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v3.25.1

Commitments and Contingencies (Details) $ in Millions | Mar. 31, 2025 USD ($)
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Maximum |
Other Commitments [Line Items] |
Commitments to fund advances for business purpose loans | $ 184.8

X
- Definition Unrecorded Commitment To Fund Advances On Business Purpose Loans + References No definition available. + Details
Name: | nymt_UnrecordedCommitmentToFundAdvancesOnBusinessPurposeLoans
Namespace Prefix: | nymt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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