v3.19.1

Financial Highlights (Expense Ratios to Average Equity) (Details) | 3 Months Ended
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Mar. 31, 2018
Investment Company, Financial Highlights [Abstract] |
Operating expenses, before interest expense and other investment related expenses | (2.67%)
Interest expense and other investment related expenses | (9.56%)
Total Expenses | (12.23%)

X
- Definition The ratio of interest and other investment related expenses to average total equity (including non-controlling interest). + References No definition available. + Details
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Data Type: | num:percentItemType
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Period Type: | duration

X
- Definition The ratio of operating expenses (before incentive fee, interest expense, and other investment related expenses) to average total equity (inclusive of non-controlling interest). + References No definition available. + Details
Name: | efc_RatioOfOperatingExpensesBeforeIncentiveFeeInterestExpenseandOtherInvestmentRelatedExpensesToAverageEquity
Namespace Prefix: | efc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of expense, after incentive allocation, to average net assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 205 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=25866437&loc=d3e10342-115837 + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration