XML 80 R63.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Investment Securities Available For Sale, at Fair Value - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract] |  |
Interest receivable | $ 0.7 | $ 2.4
Contractual maturities | 38 years |
Available for sale securities portfolio, weighted average life | 5 years 9 months 18 days | 5 years 7 months 6 days

X
- Definition Represents the weighted average life of the available for sale securities portfolio. + References No definition available. + Details
Name: | nymt_AvailableForSaleSecuritiesPortfolioLife
Namespace Prefix: | nymt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual maturities of investments. + References No definition available. + Details
Name: | nymt_ContractualMaturities
Namespace Prefix: | nymt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_InterestReceivable
Namespace Prefix: | us-gaap_
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