XML 87 R72.htm IDEA: XBRL DOCUMENT
v3.20.4

Investment Securities Available For Sale, at Fair Value - Weighted Average Life (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Investments, Debt and Equity Securities [Abstract] |  |
0 to 5 years | $ 332,934 | $ 1,359,894
Over 5 to 10 years | 320,361 | 521,517
10+ years | 71,431 | 124,729
Total | $ 724,726 | $ 2,006,140

X
- Definition Debt Securities, Available-For-Sale, Including Fair Value Option + References No definition available. + Details
Name: | nymt_DebtSecuritiesAvailableForSaleIncludingFairValueOption
Namespace Prefix: | nymt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt Securities, Trading, Available-For-Sale, Debt Maturities, Zero Through Year Five, Fair Value + References No definition available. + Details
Name: | nymt_DebtSecuritiesTradingAvailableForSaleDebtMaturitiesZeroThroughYearFiveFairValue
Namespace Prefix: | nymt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt Securities, Trading, Available-For-Sale, Maturity, Allocated And Single Maturity Date, After 10 Years, Fair Value + References No definition available. + Details
Name: | nymt_DebtSecuritiesTradingAvailableForSaleMaturityAllocatedAndSingleMaturityDateAfter10YearsFairValue
Namespace Prefix: | nymt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt Securities, Trading, Available-For-Sale, Maturity, Allocated And Single Maturity Date, After Five Through Ten Years, Fair Value + References No definition available. + Details
Name: | nymt_DebtSecuritiesTradingAvailableForSaleMaturityAllocatedAndSingleMaturityDateAfterFiveThroughTenYearsFairValue
Namespace Prefix: | nymt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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