v3.8.0.1

Significant Accounting Policies (Details) | 9 Months Ended
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Sep. 30, 2017
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
Minimum [Member] | Long-Term Incentive Plan Units [Member] | Dedicated or partially dedicated personnel [Member] |
Significant Accounting Policies [Line Items] |
Vesting period | 1 year
Maximum [Member] | Long-Term Incentive Plan Units [Member] | Dedicated or partially dedicated personnel [Member] |
Significant Accounting Policies [Line Items] |
Vesting period | 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&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: | us-gaap_RangeAxis=us-gaap_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: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |