Counterparty Risk (% Of Due from Brokers) (Details)	Mar. 31, 2015
Morgan Stanley [Member]
Concentration Risk [Line Items]
% of Total Due from Brokers	24.00%
JP Morgan Securities Inc [Member]
Concentration Risk [Line Items]
% of Total Due from Brokers	24.00%

Percentage of total amount held by a specific counterparty included in Due from Brokers above a specified concentration risk threshold.

No definition available.

Name:	efc_PercentageOfDuefromBroker
Namespace Prefix:	efc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant