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Mortgage Servicing Rights - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2025
Transfers and Servicing [Abstract]
Subservicing fee expenses	$ 0.2	$ 0.4

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- Definition

Subservicing Fee Expenses

+ References

No definition available.

+ Details

Name:	nymt_SubservicingFeeExpenses
Namespace Prefix:	nymt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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