Consolidated Statement Of Changes In Equity (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Underwriting discount	$ 3.0efc_UnderwritingDiscount		$ 1.9efc_UnderwritingDiscount
Dividends (in usd per share)	$ 3.08efc_DividendPerShare	$ 3.83efc_DividendPerShare	$ 2.50efc_DividendPerShare

Commission paid to the underwriters for the sale of shares.

No definition available.