v3.20.4

Significant Accounting Policies (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2018
Significant Accounting Policies [Line Items] |  |
Number of days to determine non-performance of loan | 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 over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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=116856206&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=srt_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: |