v2.4.1.9
Financial Highlights (Net Investment Income Ratio To Average Equity) (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Financial Highlights [Abstract]      
Net Investment Income 8.62%efc_NetInvestmentIncomeRatioToAverageEquity [1],[2] 8.40%efc_NetInvestmentIncomeRatioToAverageEquity [1],[2] 5.59%efc_NetInvestmentIncomeRatioToAverageEquity [1],[2]
[1] Includes incentive fee in calculation which can vary substantially over periods.
[2] Average equity is calculated using month end values.