v3.19.3

Significant Accounting Policies (Details) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Significant Accounting Policies [Line Items] |  |
Number of days to determine non-performance of loan | 90 days | 90 days
Long-Term Incentive Plan Units [Member] | Director [Member] |  |
Significant Accounting Policies [Line Items] |  |
Vesting period | 1 year | 1 year
Minimum | Long-Term Incentive Plan Units [Member] | Dedicated or partially dedicated personnel [Member] |  |
Significant Accounting Policies [Line Items] |  |
Vesting period | 1 year | 1 year
Maximum | Long-Term Incentive Plan Units [Member] | Dedicated or partially dedicated personnel [Member] |  |
Significant Accounting Policies [Line Items] |  |
Vesting period | 2 years | 2 years

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- Definition The number of days principal and/or interest payments on a loan are delinquent before the Company classifies the loan as "non-performing." + References No definition available. + Details
Name: | efc_Numberofdaystodeterminenonperformanceofloan
Namespace Prefix: | efc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Significant Accounting Policies [Line Items] + References No definition available. + Details
Name: | efc_SignificantAccountingPoliciesLineItems
Namespace Prefix: | efc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_AwardTypeAxis=efc_LongTermIncentivePlanUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | efc_TypeOfRecipientAxis=us-gaap_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | efc_TypeOfRecipientAxis=efc_DedicatedorpartiallydedicatedpersonnelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |