XML 103 R88.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Use of Special Purpose Entities (SPE) and Variable Interest Entities (VIE) - Classification and Carrying Value of Unconsolidated VIEs (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Unconsolidated VIE, maximum loss exposure | $ 220,800 | $ 185,300
Receivables and other assets | 117,822 | 138,323
Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 220,797 | 185,301
Investment securities available for sale, at fair value, held in securitization trusts | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 47,922 | 43,897
Receivables and other Assets | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 73 | 74
Preferred equity and mezzanine loan investments | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 138,920 | 100,150
Investment in unconsolidated entities | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 33,882 | 41,180
Other VIEs, Multi-family CMBS | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 47,995 | 43,971
Other VIEs, Multi-family CMBS | Investment securities available for sale, at fair value, held in securitization trusts | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 47,922 | 43,897
Other VIEs, Multi-family CMBS | Receivables and other Assets | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 73 | 74
Other VIEs, Multi-family CMBS | Preferred equity and mezzanine loan investments | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 0 | 0
Other VIEs, Multi-family CMBS | Investment in unconsolidated entities | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 0 | 0
Preferred Equity Investment on Multi-family Properties | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 140,329 | 100,197
Preferred Equity Investment on Multi-family Properties | Investment securities available for sale, at fair value, held in securitization trusts | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 0 | 0
Preferred Equity Investment on Multi-family Properties | Receivables and other Assets | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 0 | 0
Preferred Equity Investment on Multi-family Properties | Preferred equity and mezzanine loan investments | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 132,009 | 81,269
Preferred Equity Investment on Multi-family Properties | Investment in unconsolidated entities | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 8,320 | 18,928
Mezzanine/Construction Loan on Multi-family Properties | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 6,911 | 18,881
Mezzanine/Construction Loan on Multi-family Properties | Investment securities available for sale, at fair value, held in securitization trusts | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 0 | 0
Mezzanine/Construction Loan on Multi-family Properties | Receivables and other Assets | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 0 | 0
Mezzanine/Construction Loan on Multi-family Properties | Preferred equity and mezzanine loan investments | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 6,911 | 18,881
Mezzanine/Construction Loan on Multi-family Properties | Investment in unconsolidated entities | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 0 | 0
Equity Investment in Entities that Invest in Multi-family Properties | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 25,562 | 22,252
Equity Investment in Entities that Invest in Multi-family Properties | Investment securities available for sale, at fair value, held in securitization trusts | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 0 | 0
Equity Investment in Entities that Invest in Multi-family Properties | Receivables and other Assets | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 0 | 0
Equity Investment in Entities that Invest in Multi-family Properties | Preferred equity and mezzanine loan investments | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | 0 | 0
Equity Investment in Entities that Invest in Multi-family Properties | Investment in unconsolidated entities | Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment amount | $ 25,562 | $ 22,252

X
- Definition Carrying amounts of receivables due as of the balance sheet date from parties or arising from transactions not otherwise specified in the taxonomy. Sum of the carrying amount for an unclassified balance sheet date of expenditures made in advance of when the economic benefit of the cost will be realized, and which will be expensed in future periods with the passage of time or when a triggering event occurs and the carrying amount as of the balance sheet date of assets not otherwise specified in the taxonomy. Also includes assets not individually reported in the financial statements, or not separately disclosed in notes. + References No definition available. + Details
Name: | nymt_ReceivablesandOtherAssets
Namespace Prefix: | nymt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The item represents the maximum loss exposure on unconsolidated variable interest entities. + References No definition available. + Details
Name: | nymt_UnconsolidatedVIEMaximumLossExposure
Namespace Prefix: | nymt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Carrying amount of the assets in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph a -URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5728-111685 + Details
Name: | us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=nymt_InvestmentSecuritiesAvailableforSaleAtFairValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=nymt_ReceivablesAndOtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=nymt_MezzanineLoanandPreferredEquityInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=nymt_InvestmentinUnconsolidatedEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentAxis=nymt_MulitFamilyCMBSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentAxis=nymt_PreferredEquityInvestmentonMultifamilyPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentAxis=nymt_MezzanineConstructionLoanonMultifamilyPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentAxis=nymt_EquityInvestmentinEntitiesthatInvestinMultifamilyPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |