Counterparty Risk (% Of Due from Brokers) (Details) (Morgan Stanley [Member])	Jun. 30, 2013
Morgan Stanley [Member]
Concentration Risk [Line Items]
% of Total Due from Broker	33.00%

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