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Counterparty Risk (% Of Due from Brokers) (Details)
Dec. 31, 2014
Morgan Stanley [Member]  
Concentration Risk [Line Items]  
% of Total Due from Brokers 57.00%efc_PercentageOfDuefromBroker
/ efc_DepositsHeldWithinDealersConcentrationAxis
= efc_MorganStanleyMember
JP Morgan Securities Inc [Member]  
Concentration Risk [Line Items]  
% of Total Due from Brokers 20.00%efc_PercentageOfDuefromBroker
/ efc_DepositsHeldWithinDealersConcentrationAxis
= efc_J.P.MorganSecuritiesIncMember