XML 15 R37.htm IDEA: XBRL DOCUMENT
v3.20.1

Derivative Instruments Schedule of Derivatves (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Derivative [Line Items] |  |
Financial derivatives–assets, at fair value | $ 1,732 | $ 4,180
Financial derivatives–liabilities, at fair value | (20,234) | (2,047)
Derivative, Fair Value, Net | (18,502) | 2,133
TBA securities- purchase contracts [Member] |  |
Derivative [Line Items] |  |
Derivative, Fair Value, Net | 655 | (23)
TBA securities- sale contracts [Member] |  |
Derivative [Line Items] |  |
Derivative, Fair Value, Net | (3,455) | (159)
Derivative Financial Instruments, Assets [Member] | TBA securities- purchase contracts [Member] |  |
Derivative [Line Items] |  |
Financial derivatives–assets, at fair value | 655 | 48
Derivative Financial Instruments, Assets [Member] | TBA securities- sale contracts [Member] |  |
Derivative [Line Items] |  |
Financial derivatives–assets, at fair value | 127 | 74
Derivative Financial Instruments, Liabilities [Member] | TBA securities- purchase contracts [Member] |  |
Derivative [Line Items] |  |
Financial derivatives–liabilities, at fair value | 0 | (71)
Derivative Financial Instruments, Liabilities [Member] | TBA securities- sale contracts [Member] |  |
Derivative [Line Items] |  |
Financial derivatives–liabilities, at fair value | (3,582) | (233)
Derivative Financial Instruments, Liabilities [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Financial derivatives–liabilities, at fair value | (3,700) | (96)
Short [Member] | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Derivative, Fair Value, Net | (12,837) | 1,911
Short [Member] | Derivative Financial Instruments, Assets [Member] | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Financial derivatives–assets, at fair value | 0 | 3,543
Short [Member] | Derivative Financial Instruments, Liabilities [Member] | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Financial derivatives–liabilities, at fair value | (12,837) | (1,632)
Long [Member] | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Derivative, Fair Value, Net | 504 | 66
Long [Member] | Derivative Financial Instruments, Assets [Member] | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Financial derivatives–assets, at fair value | 619 | 81
Long [Member] | Derivative Financial Instruments, Assets [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Financial derivatives–assets, at fair value | 331 | 434
Long [Member] | Derivative Financial Instruments, Liabilities [Member] | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Financial derivatives–liabilities, at fair value | $ (115) | $ (15)

X
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
Name: | us-gaap_DerivativeAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
Name: | us-gaap_DerivativeLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=earn_TBAsecuritiespurchasecontractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=earn_TBAsecuritiessalecontractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_DerivativeFinancialInstrumentsAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_FutureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PositionAxis=us-gaap_ShortMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PositionAxis=us-gaap_LongMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |