v3.8.0.1

Counterparty Risk (% Of Total Receivable For Securities Sold) (Details)	Sep. 30, 2017
Bank of America Securities [Member]
Concentration Risk [Line Items]
% of Total Receivable for Securities Sold	29.00%
Morgan Stanley [Member]
Concentration Risk [Line Items]
% of Total Receivable for Securities Sold	23.00%

X

- Definition

Percentage of total receivables for securities sold due from a specific counterparty above a specified concentration risk threshold.

+ References

No definition available.

+ Details

Name:	efc_PercentageOfTotalReceivableForSecuritiesSold
Namespace Prefix:	efc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	efc_CounterpartyReceivableForSecuritiesSoldConcentrationAxis=efc_BankofAmericaSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	efc_CounterpartyReceivableForSecuritiesSoldConcentrationAxis=efc_MorganStanleyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: