XML 61 R51.htm IDEA: XBRL DOCUMENT
v3.21.2

Multi-family Loans, at Fair Value - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Receivables [Abstract] |  |  |  |
Unrealized gains (losses) | $ (0.4) | $ (0.9) | $ (0.7) | $ (6.6)
Loan premiums, early redemption | $ (0.1) | $ (0.4) | $ (2.1) | $ (0.5)

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
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration