v3.20.4

Financial Derivatives (Schedule of Credit Derivatives) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Credit Default Swap, Selling Protection [Member]
Credit Derivatives [Line Items]
Credit Risk Derivatives, at Fair Value, Net			$ 4,339
Fair Value	$ 3,171	$ 5,414
Notional value	68,653	132,176
Derivative notional			(98,586)
Credit Default Swap, Buying Protection [Member]
Credit Derivatives [Line Items]
Credit Risk Derivatives, at Fair Value, Net			284
Fair Value of Purchased Credit Derivatives Offsetting Written Credit Derivatives	0	(3,248)
Notional value of purchased credit derivatives offsetting written credit derivatives	$ 0	$ (81,637)
Derivative notional			$ (41,134)

X

- Definition

Derivative notional amount

+ References

No definition available.

+ Details

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Namespace Prefix:	efc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value of purchased credit derivatives (short or purchased protection) offsetting written credit derivatives (long or sold protection).

+ References

No definition available.

+ Details

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Namespace Prefix:	efc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Notional value of purchased credit derivatives (short or purchased protection) offsetting written credit derivatives (long or sold protection).

+ References

No definition available.

+ Details

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Namespace Prefix:	efc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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_CreditDerivativesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value of credit risk derivative asset after deduction of credit risk derivative liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5708775-113959

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

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Period Type:	instant

X

- Details

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X

- Details

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