v3.10.0.1

Financial Highlights (Expense Ratios To Average Equity) (Details)

3 Months Ended

6 Months Ended

Jun. 30, 2018

Jun. 30, 2017

Jun. 30, 2018

Jun. 30, 2017

Investment Company, Financial Highlights [Abstract]

Operating expenses, before interest expense and other investment related expenses

^[1],[2]

(3.01%)

(2.83%)

(2.84%)

(2.83%)

Incentive fee

^[1],[2]

(0.05%)

(0.00%)

(0.05%)

(0.00%)

Interest expense and other investment related expenses

^[1],[2]

(11.23%)

(6.02%)

(10.39%)

(5.37%)

Total Expenses

^[1],[2]

(14.29%)

(8.85%)

(13.28%)

(8.20%)

[1]	Average equity is calculated using month end values.
[2]	Ratios are annualized except for the incentive fee which is not annualized.

X

- Definition

The ratio of interest and other investment related expenses to average total equity (including non-controlling interest).

+ References

No definition available.

+ Details

Name:	efc_RatioOfInterestandotherinvestmentrelatedExpensesToAverageEquity
Namespace Prefix:	efc_
Data Type:	num:percentItemType
Balance Type:	na
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://www.xbrl.org/2003/role/presentationRef
-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

Name:	us-gaap_InvestmentCompanyExpenseRatioAfterIncentiveAllocation
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_InvestmentCompanyFinancialHighlightsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of incentive fee expense to average net assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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

Name:	us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration