v3.8.0.1

Counterparty Risk (% Of Total Receivable For Securities Sold) (Details) | Sep. 30, 2017
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Bank of America Securities [Member] |
Concentration Risk [Line Items] |
% of Total Receivable for Securities Sold | 29.00%
Morgan Stanley [Member] |
Concentration Risk [Line Items] |
% of Total Receivable for Securities Sold | 23.00%

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- Definition Percentage of total receivables for securities sold due from a specific counterparty above a specified concentration risk threshold. + References No definition available. + Details
Name: | efc_PercentageOfTotalReceivableForSecuritiesSold
Namespace Prefix: | efc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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- Details
Name: | efc_CounterpartyReceivableForSecuritiesSoldConcentrationAxis=efc_BankofAmericaSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | efc_CounterpartyReceivableForSecuritiesSoldConcentrationAxis=efc_MorganStanleyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |