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Counterparty Risk (% Of Total Collateral On Reverse Repurchase Agreements) (Details)
Dec. 31, 2014
Deutsche Bank [Member]  
Concentration Risk [Line Items]  
% of Total Collateral on Reverse Repurchase Agreements 22.00%efc_PercentageOfTotalCollateralOnReverseRepurchaseAgreements
/ efc_ReverseRepurchaseAgreementCounterpartyConcentrationAxis
= efc_DeutscheBankMember
Royal Bank of Canada [Member]  
Concentration Risk [Line Items]  
% of Total Collateral on Reverse Repurchase Agreements 17.00%efc_PercentageOfTotalCollateralOnReverseRepurchaseAgreements
/ efc_ReverseRepurchaseAgreementCounterpartyConcentrationAxis
= efc_RoyalBankofCanadaMember