v2.4.1.9

Consolidated Condensed Schedule Of Investments (Long Investments) (USD $) Share data in Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Schedule of Investments [Line Items] |  |  |  |
Fair Value | $ 2,172,082,000 us-gaap_InvestmentOwnedAtFairValue |  | $ 1,730,130,000 us-gaap_InvestmentOwnedAtFairValue |
Investment Owned, at Cost | 2,122,326,000 us-gaap_InvestmentOwnedAtCost |  | 1,688,257,000 us-gaap_InvestmentOwnedAtCost |
Percentage collaterallized by GNRCMO certificates | 100.00%efc_Percentagecollaterallizedbygnrcmocertificates |  | 100.00%efc_Percentagecollaterallizedbygnrcmocertificates |
Non-performing loans, maturity date not applicable | 11,300,000 efc_Nonperformingloansmaturitydatenotapplicable |  |  |
Unrated But Agency-Guaranteed [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Long investment holdings as a percentage of stockholders' equity | 163.60%efc_LongInvestmentHoldingsPercentOfEquityByRating / efc_InvestmentCreditRatingAxis = efc_UnratedButAgencyGuaranteedMember |  | 164.58%efc_LongInvestmentHoldingsPercentOfEquityByRating / efc_InvestmentCreditRatingAxis = efc_UnratedButAgencyGuaranteedMember |
Long Investment A Rating [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Long investment holdings as a percentage of stockholders' equity | 0.98%efc_LongInvestmentHoldingsPercentOfEquityByRating / efc_InvestmentCreditRatingAxis = efc_LongInvestmentAratingMember |  | 0.34%efc_LongInvestmentHoldingsPercentOfEquityByRating / efc_InvestmentCreditRatingAxis = efc_LongInvestmentAratingMember |
Long Investment BBB Rating [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Long investment holdings as a percentage of stockholders' equity | 5.62%efc_LongInvestmentHoldingsPercentOfEquityByRating / efc_InvestmentCreditRatingAxis = efc_LongInvestmentBbbRatingMember |  | 2.97%efc_LongInvestmentHoldingsPercentOfEquityByRating / efc_InvestmentCreditRatingAxis = efc_LongInvestmentBbbRatingMember |
Long Investment BB Rating [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Long investment holdings as a percentage of stockholders' equity | 80.65%efc_LongInvestmentHoldingsPercentOfEquityByRating / efc_InvestmentCreditRatingAxis = efc_LongInvestmentBbRatingMember |  | 97.95%efc_LongInvestmentHoldingsPercentOfEquityByRating / efc_InvestmentCreditRatingAxis = efc_LongInvestmentBbRatingMember |
Long Investment Unrated Rating [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Long investment holdings as a percentage of stockholders' equity | 24.61%efc_LongInvestmentHoldingsPercentOfEquityByRating / efc_InvestmentCreditRatingAxis = efc_LongInvestmentUnratedRatingMember |  | 10.52%efc_LongInvestmentHoldingsPercentOfEquityByRating / efc_InvestmentCreditRatingAxis = efc_LongInvestmentUnratedRatingMember |
Principal And Interest - Fixed Rate Agency Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 147.82%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[2],[3],[4],[5] | 137.75%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[2],[6],[7],[8]
Fair Value | 1,165,642,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 862,368,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 25,298 Federal National Mortgage Association Pool 3.50% 2042-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 25,298,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_TwentyFiveThousandTwoHundredandNinetyEightFederalNationalMortgageAssociationPool3Point50Percent204210Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_TwentyFiveThousandTwoHundredandNinetyEightFederalNationalMortgageAssociationPool3Point50Percent204210Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2042-10 | [1],[3],[4],[5] |  |
Fair Value | 26,448,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_TwentyFiveThousandTwoHundredandNinetyEightFederalNationalMortgageAssociationPool3Point50Percent204210Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 16,987 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 16,987,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixteenThousandNineHundredandEightySevenFederalHomeLoanMortgageCorporationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixteenThousandNineHundredandEightySevenFederalHomeLoanMortgageCorporationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-10 | [1],[3],[4],[5] |  |
Fair Value | 18,242,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixteenThousandNineHundredandEightySevenFederalHomeLoanMortgageCorporationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 16,831 Federal National Mortgage Association Pool 4.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 16,831,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixteenThousandEightHundredandThirtyOneFederalNationalMortgageAssociationPoolFourPercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixteenThousandEightHundredandThirtyOneFederalNationalMortgageAssociationPoolFourPercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-11 | [1],[3],[4],[5] |  |
Fair Value | 18,129,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixteenThousandEightHundredandThirtyOneFederalNationalMortgageAssociationPoolFourPercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,372 Federal National Mortgage Association Pool 4.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 15,372,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FifteenThousandThreeHundredandSeventyTwoFederalNationalMortgageAssociationPoolFourPercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FifteenThousandThreeHundredandSeventyTwoFederalNationalMortgageAssociationPoolFourPercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-11 | [1],[3],[4],[5] |  |
Fair Value | 16,540,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FifteenThousandThreeHundredandSeventyTwoFederalNationalMortgageAssociationPoolFourPercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 14,026 Federal National Mortgage Association Pool 5.00% 2041-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 14,026,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourteenThousandandTwentySixFederalNationalMortgageAssociationPoolFivePercent204108Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourteenThousandandTwentySixFederalNationalMortgageAssociationPoolFivePercent204108Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2041-08 | [1],[3],[4],[5] |  |
Fair Value | 15,542,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourteenThousandandTwentySixFederalNationalMortgageAssociationPoolFivePercent204108Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,953 Federal Home Loan Mortgage Corporation Pool 4.50% 2044-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 11,953,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ElevenThousandNineHundredandFiftyThreeFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ElevenThousandNineHundredandFiftyThreeFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-01 | [1],[3],[4],[5] |  |
Fair Value | 13,171,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ElevenThousandNineHundredandFiftyThreeFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,043 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 12,043,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_TwelveThousandandFortyThreeFederalHomeLoanMortgageCorporationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_TwelveThousandandFortyThreeFederalHomeLoanMortgageCorporationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-08 | [1],[3],[4],[5] |  |
Fair Value | 12,971,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_TwelveThousandandFortyThreeFederalHomeLoanMortgageCorporationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 10,661 Federal National Mortgage Association Pool 5.00% 2041-03 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 10,661,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_TenThousandSixHundredandSixtyOneFederalNationalMortgageAssociationPoolFivePercent204103Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_TenThousandSixHundredandSixtyOneFederalNationalMortgageAssociationPoolFivePercent204103Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2041-03 | [1],[3],[4],[5] |  |
Fair Value | 11,902,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_TenThousandSixHundredandSixtyOneFederalNationalMortgageAssociationPoolFivePercent204103Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,098 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-09 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 11,098,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ElevenThousandandNinetyEightFederalHomeLoanMortgageCorporationPoolFourPercent204409Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ElevenThousandandNinetyEightFederalHomeLoanMortgageCorporationPoolFourPercent204409Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-09 | [1],[3],[4],[5] |  |
Fair Value | 11,855,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ElevenThousandandNinetyEightFederalHomeLoanMortgageCorporationPoolFourPercent204409Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,186 Federal National Mortgage Association Pool 3.50% 2029-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 9,186,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_NineThousandOneHundredandEightySixFederalNationalMortgageAssociationPoolThreePointFivePercent202911Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_NineThousandOneHundredandEightySixFederalNationalMortgageAssociationPoolThreePointFivePercent202911Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2029-11 | [1],[3],[4],[5] |  |
Fair Value | 9,749,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_NineThousandOneHundredandEightySixFederalNationalMortgageAssociationPoolThreePointFivePercent202911Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,317 Federal Home Loan Mortgage Corporation Pool 3.50% 2044-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 9,317,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_NineThousandThreeHundredandSeventeenFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_NineThousandThreeHundredandSeventeenFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-11 | [1],[3],[4],[5] |  |
Fair Value | 9,721,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_NineThousandThreeHundredandSeventeenFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,999 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-07 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 8,999,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_EightThousandNineHundredandNinetyNineFederalHomeLoanMortgageCorporationPoolFourPercent204307Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_EightThousandNineHundredandNinetyNineFederalHomeLoanMortgageCorporationPoolFourPercent204307Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-07 | [1],[3],[4],[5] |  |
Fair Value | 9,639,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_EightThousandNineHundredandNinetyNineFederalHomeLoanMortgageCorporationPoolFourPercent204307Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,269 Federal National Mortgage Association Pool 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 8,269,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_EightThousandTwoHundredandSixtyNineFederalNationalMortgageAssociationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_EightThousandTwoHundredandSixtyNineFederalNationalMortgageAssociationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-08 | [1],[3],[4],[5] |  |
Fair Value | 8,859,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_EightThousandTwoHundredandSixtyNineFederalNationalMortgageAssociationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,982 Federal National Mortgage Association Pool 3.50% 2029-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 7,982,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SevenThousandNineHundredandEightyTwoFederalNationalMortgageAssociationPoolThreePointFivePercent202912Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SevenThousandNineHundredandEightyTwoFederalNationalMortgageAssociationPoolThreePointFivePercent202912Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2029-12 | [1],[3],[4],[5] |  |
Fair Value | 8,467,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SevenThousandNineHundredandEightyTwoFederalNationalMortgageAssociationPoolThreePointFivePercent202912Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,951 Federal Home Loan Mortgage Corporation Pool 3.50% 2044-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 7,951,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SevenThousandNineHundredandFiftyOneFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SevenThousandNineHundredandFiftyOneFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-11 | [1],[3],[4],[5] |  |
Fair Value | 8,319,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SevenThousandNineHundredandFiftyOneFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,051 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 7,051,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SevenThousandandFiftyOneFederalHomeLoanMortgageCorporationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SevenThousandandFiftyOneFederalHomeLoanMortgageCorporationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-10 | [1],[3],[4],[5] |  |
Fair Value | 7,572,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SevenThousandandFiftyOneFederalHomeLoanMortgageCorporationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,232 Federal Home Loan Mortgage Corporation Pool 3.50% 2044-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 7,232,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SevenThousandTwoHundredandThirtyTwoFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SevenThousandTwoHundredandThirtyTwoFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-11 | [1],[3],[4],[5] |  |
Fair Value | 7,549,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SevenThousandTwoHundredandThirtyTwoFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,983 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 6,983,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandNineHundredandEightyThreeFederalHomeLoanMortgageCorporationPoolFourPercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandNineHundredandEightyThreeFederalHomeLoanMortgageCorporationPoolFourPercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-11 | [1],[3],[4],[5] |  |
Fair Value | 7,514,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandNineHundredandEightyThreeFederalHomeLoanMortgageCorporationPoolFourPercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,999 Federal Home Loan Mortgage Corporation Pool 3.50% 2044-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 6,999,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandNineHundredandNinetyNineFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandNineHundredandNinetyNineFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-11 | [1],[3],[4],[5] |  |
Fair Value | 7,305,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandNineHundredandNinetyNineFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,933 Federal National Mortgage Association Pool 3.50% 2042-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 6,933,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandNineHundredandThirtyThreeFederalNationalMortgageAssociationPoolThreePointFivePercent204211Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandNineHundredandThirtyThreeFederalNationalMortgageAssociationPoolThreePointFivePercent204211Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2042-11 | [1],[3],[4],[5] |  |
Fair Value | 7,274,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandNineHundredandThirtyThreeFederalNationalMortgageAssociationPoolThreePointFivePercent204211Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,436 Federal Home Loan Mortgage Corporation Pool 4.50% 2044-02 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 6,436,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandFourHundredandThirtySixFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandFourHundredandThirtySixFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-02 | [1],[3],[4],[5] |  |
Fair Value | 7,094,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandFourHundredandThirtySixFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,564 Federal National Mortgage Association Pool 3.50% 2028-03 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 6,564,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandFiveHundredandSixtyFourFederalNationalMortgageAssociationPoolThreePointFivePercent202803Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandFiveHundredandSixtyFourFederalNationalMortgageAssociationPoolThreePointFivePercent202803Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2028-03 | [1],[3],[4],[5] |  |
Fair Value | 6,979,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandFiveHundredandSixtyFourFederalNationalMortgageAssociationPoolThreePointFivePercent202803Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,148 Federal National Mortgage Association Pool 5.00% 2044-03 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 6,148,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandOneHundredandFortyEightFederalNationalMortgageAssociationPoolFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandOneHundredandFortyEightFederalNationalMortgageAssociationPoolFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-03 | [1],[3],[4],[5] |  |
Fair Value | 6,863,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandOneHundredandFortyEightFederalNationalMortgageAssociationPoolFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,945 Government National Mortgage Association Pool 4.59% 2064-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,945,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandNineHundredandFortyFiveGovernmentNationalMortgageAssociationPoolFourPointFiveNinePercent206411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Government National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.59%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandNineHundredandFortyFiveGovernmentNationalMortgageAssociationPoolFourPointFiveNinePercent206411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2064-11 | [1],[3],[4],[5] |  |
Fair Value | 6,695,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandNineHundredandFortyFiveGovernmentNationalMortgageAssociationPoolFourPointFiveNinePercent206411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,046 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-09 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 6,046,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandandFortySixFederalHomeLoanMortgageCorporationPoolFourPercent204409Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandandFortySixFederalHomeLoanMortgageCorporationPoolFourPercent204409Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-09 | [1],[3],[4],[5] |  |
Fair Value | 6,459,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandandFortySixFederalHomeLoanMortgageCorporationPoolFourPercent204409Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,782 Federal National Mortgage Association Pool 4.50% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,782,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandSevenHundredandEightyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandSevenHundredandEightyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-10 | [1],[3],[4],[5] |  |
Fair Value | 6,296,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandSevenHundredandEightyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,916 Federal National Mortgage Association Pool 4.50% 2026-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,916,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandNineHundredandSixteenFederalNationalMortgageAssociationPoolFourPointFivePercent202604Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandNineHundredandSixteenFederalNationalMortgageAssociationPoolFourPointFivePercent202604Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2026-04 | [1],[3],[4],[5] |  |
Fair Value | 6,232,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandNineHundredandSixteenFederalNationalMortgageAssociationPoolFourPointFivePercent202604Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,526 Federal National Mortgage Association Pool 4.50% 2044-02 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,526,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandFiveHundredandTwentySixFederalNationalMortgageAssociationPoolFourPointFivePercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandFiveHundredandTwentySixFederalNationalMortgageAssociationPoolFourPointFivePercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-02 | [1],[3],[4],[5] |  |
Fair Value | 6,108,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandFiveHundredandTwentySixFederalNationalMortgageAssociationPoolFourPointFivePercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,557 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,557,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandFiveHundredandFiftySevenFederalHomeLoanMortgageCorporationPoolFourPercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandFiveHundredandFiftySevenFederalHomeLoanMortgageCorporationPoolFourPercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-11 | [1],[3],[4],[5] |  |
Fair Value | 5,973,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandFiveHundredandFiftySevenFederalHomeLoanMortgageCorporationPoolFourPercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,220 Federal National Mortgage Association Pool 5.00% 2044-03 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,220,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandTwoHundredandTwentyFederalNationalMortgageAssociationPoolFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandTwoHundredandTwentyFederalNationalMortgageAssociationPoolFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-03 | [1],[3],[4],[5] |  |
Fair Value | 5,839,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandTwoHundredandTwentyFederalNationalMortgageAssociationPoolFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,431 Federal National Mortgage Association Pool 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,431,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandFourHundredandThirtyOneFederalNationalMortgageAssociationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandFourHundredandThirtyOneFederalNationalMortgageAssociationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-08 | [1],[3],[4],[5] |  |
Fair Value | 5,822,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandFourHundredandThirtyOneFederalNationalMortgageAssociationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,410 Federal National Mortgage Association Pool 4.00% 2044-05 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,410,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandFourHundredandTenFederalNationalMortgageAssociationPoolFourPercent204405Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandFourHundredandTenFederalNationalMortgageAssociationPoolFourPercent204405Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-05 | [1],[3],[4],[5] |  |
Fair Value | 5,819,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandFourHundredandTenFederalNationalMortgageAssociationPoolFourPercent204405Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,708 Federal Home Loan Mortgage Corporation Pool 3.00% 2043-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,708,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandSevenHundredandEightFederalHomeLoanMortgageCorporationPoolThreePercent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandSevenHundredandEightFederalHomeLoanMortgageCorporationPoolThreePercent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-01 | [1],[3],[4],[5] |  |
Fair Value | 5,788,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandSevenHundredandEightFederalHomeLoanMortgageCorporationPoolThreePercent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,402 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,402,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandFourHundredandTwoFederalHomeLoanMortgageCorporationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandFourHundredandTwoFederalHomeLoanMortgageCorporationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-08 | [1],[3],[4],[5] |  |
Fair Value | 5,786,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandFourHundredandTwoFederalHomeLoanMortgageCorporationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,131 Federal National Mortgage Association Pool 5.50% 2039-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,131,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandOneHundredandThirtyOneFederalNationalMortgageAssociationPoolFivePointFivePercent203910Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandOneHundredandThirtyOneFederalNationalMortgageAssociationPoolFivePointFivePercent203910Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2039-10 | [1],[3],[4],[5] |  |
Fair Value | 5,741,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandOneHundredandThirtyOneFederalNationalMortgageAssociationPoolFivePointFivePercent203910Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,407 Federal National Mortgage Association Pool, 3.50% 2044-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,407,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandFourHundredandSevenFederalNationalMortgageAssociationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandFourHundredandSevenFederalNationalMortgageAssociationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-11 | [1],[3],[4],[5] |  |
Fair Value | 5,668,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandFourHundredandSevenFederalNationalMortgageAssociationPoolThreePointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,130 Federal National Mortgage Association Pool 4.00% 2044-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,130,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandOneHundredandThirtyFederalNationalMortgageAssociationPoolFourPercent204406Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandOneHundredandThirtyFederalNationalMortgageAssociationPoolFourPercent204406Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-06 | [1],[3],[4],[5] |  |
Fair Value | 5,502,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandOneHundredandThirtyFederalNationalMortgageAssociationPoolFourPercent204406Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,414 Federal National Mortgage Association Pool 3.00% 2043-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,414,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandFourHundredandFourteenFederalNationalMortgageAssociationPoolThreePercent204304Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandFourHundredandFourteenFederalNationalMortgageAssociationPoolThreePercent204304Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-04 | [1],[3],[4],[5] |  |
Fair Value | 5,489,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandFourHundredandFourteenFederalNationalMortgageAssociationPoolThreePercent204304Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,058 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-07 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,058,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandandFiftyEightFederalHomeLoanMortgageCorporationPoolFourPercent204407Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandandFiftyEightFederalHomeLoanMortgageCorporationPoolFourPercent204407Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-07 | [1],[3],[4],[5] |  |
Fair Value | 5,450,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandandFiftyEightFederalHomeLoanMortgageCorporationPoolFourPercent204407Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,897 Federal National Mortgage Association Pool 4.50% 2043-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,897,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandEightHundredandNinetySevenFederalNationalMortgageAssociationPoolFourPointFivePercent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandEightHundredandNinetySevenFederalNationalMortgageAssociationPoolFourPointFivePercent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-12 | [1],[3],[4],[5] |  |
Fair Value | 5,402,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandEightHundredandNinetySevenFederalNationalMortgageAssociationPoolFourPointFivePercent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,036 Federal National Mortgage Association Pool 3.50% 2029-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,036,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandandThirtySixFederalNationalMortgageAssociationPoolThreePointFivePercent202911Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandandThirtySixFederalNationalMortgageAssociationPoolThreePointFivePercent202911Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2029-11 | [1],[3],[4],[5] |  |
Fair Value | 5,353,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandandThirtySixFederalNationalMortgageAssociationPoolThreePointFivePercent202911Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,942 Federal National Mortgage Association Pool 4.00% 2044-05 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,942,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandNineHundredandFortyTwoFederalNationalMortgageAssociationPoolFourPercent204405Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandNineHundredandFortyTwoFederalNationalMortgageAssociationPoolFourPercent204405Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-05 | [1],[3],[4],[5] |  |
Fair Value | 5,322,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandNineHundredandFortyTwoFederalNationalMortgageAssociationPoolFourPercent204405Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,922 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,922,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandNineHundredandTwentyTwoFederalHomeLoanMortgageCorporationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandNineHundredandTwentyTwoFederalHomeLoanMortgageCorporationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-10 | [1],[3],[4],[5] |  |
Fair Value | 5,304,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandNineHundredandTwentyTwoFederalHomeLoanMortgageCorporationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,981 Federal National Mortgage Association Pool 3.50% 2028-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,981,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandNineHundredandEightyOneFederalNationalMortgageAssociationPoolThreePointFivePercent202812Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandNineHundredandEightyOneFederalNationalMortgageAssociationPoolThreePointFivePercent202812Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2028-12 | [1],[3],[4],[5] |  |
Fair Value | 5,290,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandNineHundredandEightyOneFederalNationalMortgageAssociationPoolThreePointFivePercent202812Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,662 Federal National Mortgage Association Pool 4.50% 2044-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,662,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandSixHundredandSixtyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandSixHundredandSixtyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-01 | [1],[3],[4],[5] |  |
Fair Value | 5,146,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandSixHundredandSixtyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,708 Federal National Mortgage Association Pool 4.50% 2044-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,708,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandSevenHundredandEightFederalNationalMortgageAssociationPoolFourPointFivePercent204412Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandSevenHundredandEightFederalNationalMortgageAssociationPoolFourPointFivePercent204412Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-12 | [1],[3],[4],[5] |  |
Fair Value | 5,120,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandSevenHundredandEightFederalNationalMortgageAssociationPoolFourPointFivePercent204412Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,585 Federal National Mortgage Association Pool 3.50% 2029-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,585,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFiveHundredandEightyFiveFederalNationalMortgageAssociationPoolThreePointFivePercent202912Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFiveHundredandEightyFiveFederalNationalMortgageAssociationPoolThreePointFivePercent202912Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2029-12 | [1],[3],[4],[5] |  |
Fair Value | 4,864,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFiveHundredandEightyFiveFederalNationalMortgageAssociationPoolThreePointFivePercent202912Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,413 Federal Home Loan Mortgage Corporation Pool 4.50% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,413,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFourHundredandThirteenFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFourHundredandThirteenFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-10 | [1],[3],[4],[5] |  |
Fair Value | 4,861,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFourHundredandThirteenFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,487 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-02 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,487,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFourHundredandEightySevenFederalHomeLoanMortgageCorporationPoolFourPercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFourHundredandEightySevenFederalHomeLoanMortgageCorporationPoolFourPercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-02 | [1],[3],[4],[5] |  |
Fair Value | 4,835,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFourHundredandEightySevenFederalHomeLoanMortgageCorporationPoolFourPercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,491 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,491,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFourHundredandNinetyOneFederalHomeLoanMortgageCorporationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFourHundredandNinetyOneFederalHomeLoanMortgageCorporationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-08 | [1],[3],[4],[5] |  |
Fair Value | 4,810,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFourHundredandNinetyOneFederalHomeLoanMortgageCorporationPoolFourPercent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,468 Federal National Mortgage Association Pool 4.00% 2043-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,468,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFourHundredandSixtyEightFederalNationalMortgageAssociationPoolFourPercent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFourHundredandSixtyEightFederalNationalMortgageAssociationPoolFourPercent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-01 | [1],[3],[4],[5] |  |
Fair Value | 4,783,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFourHundredandSixtyEightFederalNationalMortgageAssociationPoolFourPercent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,443 Federal National Mortgage Association Pool 4.00% 2044-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,443,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFourHundredandFortyThreeFederalNationalMortgageAssociationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFourHundredandFortyThreeFederalNationalMortgageAssociationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-10 | [1],[3],[4],[5] |  |
Fair Value | 4,750,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFourHundredandFortyThreeFederalNationalMortgageAssociationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,358 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,358,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandThreeHundredandFiftyEightFederalHomeLoanMortgageCorporationPoolFourPercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandThreeHundredandFiftyEightFederalHomeLoanMortgageCorporationPoolFourPercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-11 | [1],[3],[4],[5] |  |
Fair Value | 4,689,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandThreeHundredandFiftyEightFederalHomeLoanMortgageCorporationPoolFourPercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,246 Federal National Mortgage Association Pool 4.50% 2044-02 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,246,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandTwoHundredandFortySixFederalNationalMortgageAssociationPoolFourPointFivePercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandTwoHundredandFortySixFederalNationalMortgageAssociationPoolFourPointFivePercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-02 | [1],[3],[4],[5] |  |
Fair Value | 4,666,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandTwoHundredandFortySixFederalNationalMortgageAssociationPoolFourPointFivePercent204402Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,131 Government National Mortgage Association Pool 4.68% 2064-09 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,131,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandOneHundredandThirtyOneGovernmentNationalMortgageAssociationPoolFourPointSixEightPercent206409Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Government National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.68%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandOneHundredandThirtyOneGovernmentNationalMortgageAssociationPoolFourPointSixEightPercent206409Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2064-09 | [1],[3],[4],[5] |  |
Fair Value | 4,647,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandOneHundredandThirtyOneGovernmentNationalMortgageAssociationPoolFourPointSixEightPercent206409Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,108 Federal National Mortgage Association Pool 4.50% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,108,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandOneHundredandEightFederalNationalMortgageAssociationPoolFourPointFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandOneHundredandEightFederalNationalMortgageAssociationPoolFourPointFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-10 | [1],[3],[4],[5] |  |
Fair Value | 4,499,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandOneHundredandEightFederalNationalMortgageAssociationPoolFourPointFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,072 Federal National Mortgage Association Pool 4.50% 2044-03 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,072,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandandSeventyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandandSeventyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-03 | [1],[3],[4],[5] |  |
Fair Value | 4,475,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandandSeventyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,211 Federal National Mortgage Association Pool 3.50% 2029-05 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,211,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandTwoHundredandElevenFederalNationalMortgageAssociationPoolThreePointFivePercent202905Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandTwoHundredandElevenFederalNationalMortgageAssociationPoolThreePointFivePercent202905Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2029-05 | [1],[3],[4],[5] |  |
Fair Value | 4,467,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandTwoHundredandElevenFederalNationalMortgageAssociationPoolThreePointFivePercent202905Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,181 Government National Mortgage Association Pool 4.75% 2061-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,181,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandOneHundredandEightyOneGovernmentNationalMortgageAssociationPoolFourPointSevenFivePercent206101Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Government National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.75%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandOneHundredandEightyOneGovernmentNationalMortgageAssociationPoolFourPointSevenFivePercent206101Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2061-01 | [1],[3],[4],[5] |  |
Fair Value | 4,457,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandOneHundredandEightyOneGovernmentNationalMortgageAssociationPoolFourPointSevenFivePercent206101Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,000 Federal National Mortgage Association Pool 5.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,000,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-10 | [1],[3],[4],[5] |  |
Fair Value | 4,444,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,838 Government National Mortgage Association Pool 4.61% 2064-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,838,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredandThirtyEightGovernmentNationalMortgageAssociationPoolFourPointSixtyOnePercent206411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Government National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.61%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredandThirtyEightGovernmentNationalMortgageAssociationPoolFourPointSixtyOnePercent206411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2064-11 | [1],[3],[4],[5] |  |
Fair Value | 4,322,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredandThirtyEightGovernmentNationalMortgageAssociationPoolFourPointSixtyOnePercent206411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,962 Federal National Mortgage Association Pool 4.50% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,962,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandNineHundredandSixtyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandNineHundredandSixtyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-11 | [1],[3],[4],[5] |  |
Fair Value | 4,308,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandNineHundredandSixtyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,141 Federal Home Loan Mortgage Corporation Pool 3.50% 2043-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,141,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandOneHundredandFortyOneFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandOneHundredandFortyOneFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-06 | [1],[3],[4],[5] |  |
Fair Value | 4,298,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandOneHundredandFortyOneFederalHomeLoanMortgageCorporationPoolThreePointFivePercent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,809 Government National Mortgage Association Pool 4.63% 2064-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,809,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredandNineGovernmentNationalMortgageAssociationPoolFourPointSixThreePercent206410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Government National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.63%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredandNineGovernmentNationalMortgageAssociationPoolFourPointSixThreePercent206410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2064-10 | [1],[3],[4],[5] |  |
Fair Value | 4,295,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredandNineGovernmentNationalMortgageAssociationPoolFourPointSixThreePercent206410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,943 Federal Home Loan Mortgage Corporation Pool 4.50% 2043-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,943,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandNineHundredandFortyThreeFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandNineHundredandFortyThreeFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-12 | [1],[3],[4],[5] |  |
Fair Value | 4,294,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandNineHundredandFortyThreeFederalHomeLoanMortgageCorporationPoolFourPointFivePercent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,997 Federal National Mortgage Association Pool 4.00% 2044-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,997,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandNineHundredandNinetySevenFederalNationalMortgageAssociationPoolFourPercent204406Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandNineHundredandNinetySevenFederalNationalMortgageAssociationPoolFourPercent204406Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-06 | [1],[3],[4],[5] |  |
Fair Value | 4,289,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandNineHundredandNinetySevenFederalNationalMortgageAssociationPoolFourPercent204406Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,809 Federal National Mortgage Association Pool 5.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,809,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredandNineFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredandNineFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-10 | [1],[3],[4],[5] |  |
Fair Value | 4,259,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredandNineFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,784 Federal National Mortgage Association Pool 5.00% 2044-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,784,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSevenHundredandEightyFourFederalNationalMortgageAssociationPoolFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSevenHundredandEightyFourFederalNationalMortgageAssociationPoolFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-11 | [1],[3],[4],[5] |  |
Fair Value | 4,195,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSevenHundredandEightyFourFederalNationalMortgageAssociationPoolFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,896 Federal National Mortgage Association Pool 4.00% 2044-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,896,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredandNinetySixFederalNationalMortgageAssociationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredandNinetySixFederalNationalMortgageAssociationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-10 | [1],[3],[4],[5] |  |
Fair Value | 4,193,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredandNinetySixFederalNationalMortgageAssociationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,843 Federal National Mortgage Association Pool 4.50% 2044-03 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,843,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredandFortyThreeFederalNationalMortgageAssociationPoolFourPointFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredandFortyThreeFederalNationalMortgageAssociationPoolFourPointFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-03 | [1],[3],[4],[5] |  |
Fair Value | 4,190,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredandFortyThreeFederalNationalMortgageAssociationPoolFourPointFivePercent204403Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,884 Federal National Mortgage Association Pool 4.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,884,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredandEightyFourFederalNationalMortgageAssociationPoolFourPercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredandEightyFourFederalNationalMortgageAssociationPoolFourPercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-11 | [1],[3],[4],[5] |  |
Fair Value | 4,180,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredandEightyFourFederalNationalMortgageAssociationPoolFourPercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,922 Federal National Mortgage Association Pool 3.50% 2029-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,922,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandNineHundredandTwentyTwoFederalNationalMortgageAssociationPoolThreePointFivePercent202911Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandNineHundredandTwentyTwoFederalNationalMortgageAssociationPoolThreePointFivePercent202911Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2029-11 | [1],[3],[4],[5] |  |
Fair Value | 4,170,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandNineHundredandTwentyTwoFederalNationalMortgageAssociationPoolThreePointFivePercent202911Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,807 Federal National Mortgage Corporation Pool 4.00% 2033-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,807,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredandSevenFederalNationalMortgageAssociationPoolFourPercent203311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredandSevenFederalNationalMortgageAssociationPoolFourPercent203311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2033-11 | [1],[3],[4],[5] |  |
Fair Value | 4,123,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredandSevenFederalNationalMortgageAssociationPoolFourPercent203311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,656 Federal National Mortgage Association Pool 5.00% 2044-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,656,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSixHundredandFiftySixFederalNationalMortgageAssociationPoolFivePercent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSixHundredandFiftySixFederalNationalMortgageAssociationPoolFivePercent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-01 | [1],[3],[4],[5] |  |
Fair Value | 4,121,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSixHundredandFiftySixFederalNationalMortgageAssociationPoolFivePercent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,816 Federal National Mortgage Association Pool 4.00% 2042-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,816,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredandSixteenFederalNationalMortgageAssociationPoolFourPercent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredandSixteenFederalNationalMortgageAssociationPoolFourPercent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2042-04 | [1],[3],[4],[5] |  |
Fair Value | 4,098,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredandSixteenFederalNationalMortgageAssociationPoolFourPercent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,683 Federal National Mortgage Association Pool 5.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,683,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSixHundredandEightyThreeFederalNationalMortgageAssociationPoolFivePercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSixHundredandEightyThreeFederalNationalMortgageAssociationPoolFivePercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-11 | [1],[3],[4],[5] |  |
Fair Value | 4,086,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSixHundredandEightyThreeFederalNationalMortgageAssociationPoolFivePercent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,661 Federal National Mortgage Association Pool 5.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,661,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSixHundredandSixtyOneFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSixHundredandSixtyOneFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-10 | [1],[3],[4],[5] |  |
Fair Value | 4,085,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSixHundredandSixtyOneFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,744 Federal National Mortgage Association Pool 4.50% 2044-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,744,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSevenHundredandFortyFourFederalNationalMortgageAssociationPoolFourPointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSevenHundredandFortyFourFederalNationalMortgageAssociationPoolFourPointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-11 | [1],[3],[4],[5] |  |
Fair Value | 4,079,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSevenHundredandFortyFourFederalNationalMortgageAssociationPoolFourPointFivePercent204411Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,692 Federal National Mortgage Association Pool 4.50% 2044-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,692,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSixHundredandNinetyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204412Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSixHundredandNinetyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204412Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-12 | [1],[3],[4],[5] |  |
Fair Value | 4,045,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSixHundredandNinetyTwoFederalNationalMortgageAssociationPoolFourPointFivePercent204412Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,706 Federal National Mortgage Association Pool 4.00% 2044-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,706,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSevenHundredandSixFederalNationalMortgageAssociationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSevenHundredandSixFederalNationalMortgageAssociationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2044-10 | [1],[3],[4],[5] |  |
Fair Value | 3,989,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSevenHundredandSixFederalNationalMortgageAssociationPoolFourPercent204410Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,921 Federal National Mortgage Association Pool 3.00% 2043-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,921,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandNineHundredandTwentyOneFederalNationalMortgageAssociationPoolThreePercent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandNineHundredandTwentyOneFederalNationalMortgageAssociationPoolThreePercent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-01 | [1],[3],[4],[5] |  |
Fair Value | 3,978,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandNineHundredandTwentyOneFederalNationalMortgageAssociationPoolThreePercent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,597 Federal National Mortgage Association Pool 5.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,597,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFiveHundredandNinetySevenFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFiveHundredandNinetySevenFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2043-10 | [1],[3],[4],[5] |  |
Fair Value | 3,973,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFiveHundredandNinetySevenFederalNationalMortgageAssociationPoolFivePercent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 360,009,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 111,228,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Federal National Mortgage Association Pools | [1],[3],[4],[5] | Other Federal National Mortgage Association Pools | [1],[6],[7],[8]
Fair Value | 389,510,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 115,792,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4],[5] | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity | 2026-06 | [1],[3],[4],[5] | 2028-06 | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 6.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4],[5] | 6.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity | 2045-01 | [1],[3],[4],[5] | 2044-01 | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 187,073,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 80,675,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Federal Home Loan Mortgage Corporation Pools | [1],[3],[4],[5] | Other Federal Home Loan Mortgage Corporation Pools | [1],[6],[7],[8]
Fair Value | 200,541,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 81,716,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4],[5] | 2.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity | 2028-03 | [1],[3],[4],[5] | 2028-09 | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 6.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4],[5] | 6.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity | 2045-01 | [1],[3],[4],[5] | 2043-12 | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 26,938,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 8,191,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Government National Mortgage Association Pools | [1],[3],[4],[5] | Other Government National Mortgage Association Pools | [1],[6],[7],[8]
Fair Value | 29,466,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 8,949,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 4.49%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4],[5] | 4.49%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity | 2060-02 | [1],[3],[4],[5] | 2061-11 | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 5.54%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4],[5] | 4.68%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity | 2064-11 | [1],[3],[4],[5] | 2062-11 | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 38,439 Federal National Mortgage Association Pool, 3.50% 2043-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 38,439,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThirtyEightThousandFourHundredThirtyNineFederalNationalMortgageAssociationPool3Point50Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThirtyEightThousandFourHundredThirtyNineFederalNationalMortgageAssociationPool3Point50Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-01 | [1],[6],[7],[8]
Fair Value |  |  | 37,742,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThirtyEightThousandFourHundredThirtyNineFederalNationalMortgageAssociationPool3Point50Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 27,523 Federal National Mortgage Association Pool, 3.50% 2042-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 27,523,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_TwentySevenThousandFiveHundredTwentyThreeFederalNationalMortgageAssociationPool3Point50Percent204210Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_TwentySevenThousandFiveHundredTwentyThreeFederalNationalMortgageAssociationPool3Point50Percent204210Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2042-10 | [1],[6],[7],[8]
Fair Value |  |  | 27,407,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_TwentySevenThousandFiveHundredTwentyThreeFederalNationalMortgageAssociationPool3Point50Percent204210Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 17,735 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 17,735,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SeventeenThousandSevenHundredThirtyFiveFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SeventeenThousandSevenHundredThirtyFiveFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-11 | [1],[6],[7],[8]
Fair Value |  |  | 18,327,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SeventeenThousandSevenHundredThirtyFiveFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 18,267 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 18,267,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_EighteenThousandTwoHundredSixtySevenFederalHomeLoanMortgageCorporationPool3Point00Percent204304Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_EighteenThousandTwoHundredSixtySevenFederalHomeLoanMortgageCorporationPool3Point00Percent204304Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-04 | [1],[6],[7],[8]
Fair Value |  |  | 17,322,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_EighteenThousandTwoHundredSixtySevenFederalHomeLoanMortgageCorporationPool3Point00Percent204304Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,538 Federal National Mortgage Association Pool, 5.00% 2041-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 15,538,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FifteenThousandFiveHundredThirtyEightFederalNationalMortgageAssociationPool5Point00Percent204108Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FifteenThousandFiveHundredThirtyEightFederalNationalMortgageAssociationPool5Point00Percent204108Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2041-08 | [1],[6],[7],[8]
Fair Value |  |  | 16,910,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FifteenThousandFiveHundredThirtyEightFederalNationalMortgageAssociationPool5Point00Percent204108Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 16,572 Federal National Mortgage Association Pool, 3.00% 2028-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 16,572,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixteenThousandFiveHundredSeventyTwoFederalNationalMortgageAssociationPool3Point00Percent202806Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixteenThousandFiveHundredSeventyTwoFederalNationalMortgageAssociationPool3Point00Percent202806Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2028-06 | [1],[6],[7],[8]
Fair Value |  |  | 16,729,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixteenThousandFiveHundredSeventyTwoFederalNationalMortgageAssociationPool3Point00Percent202806Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,759 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 15,759,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FifteenThousandSevenHundredFiftyNineFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FifteenThousandSevenHundredFiftyNineFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-11 | [1],[6],[7],[8]
Fair Value |  |  | 16,279,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FifteenThousandSevenHundredFiftyNineFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,017 Federal National Mortgage Association Pool, 4.50% 2041-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 15,017,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FifteenThousandSeventeenFederalNationalMortgageAssociationPool4Point50Percent204110Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FifteenThousandSeventeenFederalNationalMortgageAssociationPool4Point50Percent204110Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2041-10 | [1],[6],[7],[8]
Fair Value |  |  | 15,958,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FifteenThousandSeventeenFederalNationalMortgageAssociationPool4Point50Percent204110Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 14,835 Federal National Mortgage Association Pool, 4.50% 2041-09 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 14,835,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourteenThousandEightHundredThirtyFiveFederalNationalMortgageAssociationPool4Point50Percent204109Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourteenThousandEightHundredThirtyFiveFederalNationalMortgageAssociationPool4Point50Percent204109Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2041-09 | [1],[6],[7],[8]
Fair Value |  |  | 15,743,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourteenThousandEightHundredThirtyFiveFederalNationalMortgageAssociationPool4Point50Percent204109Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 13,367 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 13,367,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThirteenThousandThreeHundredSixtySevenFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThirteenThousandThreeHundredSixtySevenFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 13,783,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThirteenThousandThreeHundredSixtySevenFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,686 Federal Home Loan Mortgage Corporation Pool, 5.00% 2041-07 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 12,686,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_TwelveThousandSixHundredEightySixFederalHomeLoanMortgageCorporationPool5Point00Percent204107Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_TwelveThousandSixHundredEightySixFederalHomeLoanMortgageCorporationPool5Point00Percent204107Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2041-07 | [1],[6],[7],[8]
Fair Value |  |  | 13,692,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_TwelveThousandSixHundredEightySixFederalHomeLoanMortgageCorporationPool5Point00Percent204107Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,316 Federal National Mortgage Association Pool, 5.00% 2041-03 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 12,316,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_TwelveThousandThreeHundredSixteenFederalNationalMortgageAssociationPool5Point00Percent204103Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_TwelveThousandThreeHundredSixteenFederalNationalMortgageAssociationPool5Point00Percent204103Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2041-03 | [1],[6],[7],[8]
Fair Value |  |  | 13,444,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_TwelveThousandThreeHundredSixteenFederalNationalMortgageAssociationPool5Point00Percent204103Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,295 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 11,295,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ElevenThousandTwoHundredNinetyFiveFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ElevenThousandTwoHundredNinetyFiveFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 12,005,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ElevenThousandTwoHundredNinetyFiveFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,478 Federal National Mortgage Association Pool, 4.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 11,478,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ElevenThousandFourHundredSeventyEightFederalNationalMortgageAssociationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ElevenThousandFourHundredSeventyEightFederalNationalMortgageAssociationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 11,861,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ElevenThousandFourHundredSeventyEightFederalNationalMortgageAssociationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,835 Federal National Mortgage Association Pool, 3.00% 2042-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 11,835,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ElevenThousandEightHundredThirtyFiveFederalNationalMortgageAssociationPool3Point00Percent204208Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ElevenThousandEightHundredThirtyFiveFederalNationalMortgageAssociationPool3Point00Percent204208Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2042-08 | [1],[6],[7],[8]
Fair Value |  |  | 11,263,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ElevenThousandEightHundredThirtyFiveFederalNationalMortgageAssociationPool3Point00Percent204208Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,697 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-07 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 9,697,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_NineThousandSixHundredNinetySevenFederalHomeLoanMortgageCorporationPool4Point00Percent204307Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_NineThousandSixHundredNinetySevenFederalHomeLoanMortgageCorporationPool4Point00Percent204307Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-07 | [1],[6],[7],[8]
Fair Value |  |  | 9,979,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_NineThousandSixHundredNinetySevenFederalHomeLoanMortgageCorporationPool4Point00Percent204307Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,114 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 9,114,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_NineThousandOneHundredFourteenFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_NineThousandOneHundredFourteenFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 9,409,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_NineThousandOneHundredFourteenFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,841 Federal Home Loan Mortgage Corporation Pool, 4.50% 2041-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 8,841,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_EightThousandEightHundredFortyOneFederalHomeLoanMortgageCorporationPool4Point50Percent204110Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_EightThousandEightHundredFortyOneFederalHomeLoanMortgageCorporationPool4Point50Percent204110Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2041-10 | [1],[6],[7],[8]
Fair Value |  |  | 9,378,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_EightThousandEightHundredFortyOneFederalHomeLoanMortgageCorporationPool4Point50Percent204110Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,025 Federal National Mortgage Association Pool, 4.00% 2043-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 9,025,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_NineThousandTwentyFiveFederalNationalMortgageAssociationPool4Point00Percent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_NineThousandTwentyFiveFederalNationalMortgageAssociationPool4Point00Percent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-12 | [1],[6],[7],[8]
Fair Value |  |  | 9,326,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_NineThousandTwentyFiveFederalNationalMortgageAssociationPool4Point00Percent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,747 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-02 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 9,747,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_NineThousandSevenHundredFortySevenFederalHomeLoanMortgageCorporationPool3Point00Percent204302Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_NineThousandSevenHundredFortySevenFederalHomeLoanMortgageCorporationPool3Point00Percent204302Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-02 | [1],[6],[7],[8]
Fair Value |  |  | 9,251,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_NineThousandSevenHundredFortySevenFederalHomeLoanMortgageCorporationPool3Point00Percent204302Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,789 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 8,789,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_EightThousandSevenHundredEightyNineFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_EightThousandSevenHundredEightyNineFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-11 | [1],[6],[7],[8]
Fair Value |  |  | 9,013,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_EightThousandSevenHundredEightyNineFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,413 Federal National Mortgage Association Pool, 4.50% 2026-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 7,413,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SevenThousandFourHundredThirteenFederalNationalMortgageAssociationPool4Point50Percent202604Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SevenThousandFourHundredThirteenFederalNationalMortgageAssociationPool4Point50Percent202604Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2026-04 | [1],[6],[7],[8]
Fair Value |  |  | 7,898,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SevenThousandFourHundredThirteenFederalNationalMortgageAssociationPool4Point50Percent202604Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,893 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,893,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandEightHundredNinetyThreeFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandEightHundredNinetyThreeFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 7,326,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandEightHundredNinetyThreeFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,327 Federal National Mortgage Association Pool, 3.50% 2042-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 7,327,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SevenThousandThreeHundredTwentySevenFederalNationalMortgageAssociationPool3Point50Percent204211Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SevenThousandThreeHundredTwentySevenFederalNationalMortgageAssociationPool3Point50Percent204211Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2042-11 | [1],[6],[7],[8]
Fair Value |  |  | 7,299,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SevenThousandThreeHundredTwentySevenFederalNationalMortgageAssociationPool3Point50Percent204211Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,854 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,854,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandEightHundredFiftyFourFederalHomeLoanMortgageCorporationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandEightHundredFiftyFourFederalHomeLoanMortgageCorporationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 7,005,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandEightHundredFiftyFourFederalHomeLoanMortgageCorporationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,288 Federal National Mortgage Association Pool, 5.50% 2039-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,288,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandTwoHundredEightyEightFederalNationalMortgageAssociationPool5Point50Percent203910Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandTwoHundredEightyEightFederalNationalMortgageAssociationPool5Point50Percent203910Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2039-10 | [1],[6],[7],[8]
Fair Value |  |  | 6,946,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandTwoHundredEightyEightFederalNationalMortgageAssociationPool5Point50Percent203910Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,463 Federal National Mortgage Association Pool, 4.50% 2043-09 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,463,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandFourHundredSixtyThreeFederalNationalMortgageAssociationPool4Point50Percent204309Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandFourHundredSixtyThreeFederalNationalMortgageAssociationPool4Point50Percent204309Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-09 | [1],[6],[7],[8]
Fair Value |  |  | 6,865,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandFourHundredSixtyThreeFederalNationalMortgageAssociationPool4Point50Percent204309Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,033 Federal National Mortgage Association Pool, 4.50% 2043-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,033,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandThirtyThreeFederalNationalMortgageAssociationPool4Point50Percent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandThirtyThreeFederalNationalMortgageAssociationPool4Point50Percent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-12 | [1],[6],[7],[8]
Fair Value |  |  | 6,418,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandThirtyThreeFederalNationalMortgageAssociationPool4Point50Percent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,022 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,022,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandTwentyTwoFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandTwentyTwoFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 6,228,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandTwentyTwoFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,025 Federal National Mortgage Association Pool, 4.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,025,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandTwentyFiveFederalNationalMortgageAssociationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandTwentyFiveFederalNationalMortgageAssociationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 6,218,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandTwentyFiveFederalNationalMortgageAssociationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,632 Government National Mortgage Association Pool, 4.46% 2063-02 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,632,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandSixHundredThirtyTwoGovernmentNationalMortgageAssociationPool4Point46Percent206302Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.46%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandSixHundredThirtyTwoGovernmentNationalMortgageAssociationPool4Point46Percent206302Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2063-02 | [1],[6],[7],[8]
Fair Value |  |  | 6,136,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandSixHundredThirtyTwoGovernmentNationalMortgageAssociationPool4Point46Percent206302Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,893 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,893,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandEightHundredNinetyThreeFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandEightHundredNinetyThreeFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 6,083,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandEightHundredNinetyThreeFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,342 Federal National Mortgage Association Pool, 3.00% 2042-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,342,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandThreeHundredFortyTwoFederalNationalMortgageAssociationPool3Point00Percent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandThreeHundredFortyTwoFederalNationalMortgageAssociationPool3Point00Percent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2042-04 | [1],[6],[7],[8]
Fair Value |  |  | 6,035,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandThreeHundredFortyTwoFederalNationalMortgageAssociationPool3Point00Percent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,287 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,287,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandTwoHundredEightySevenFederalHomeLoanMortgageCorporationPool3Point00Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandTwoHundredEightySevenFederalHomeLoanMortgageCorporationPool3Point00Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-01 | [1],[6],[7],[8]
Fair Value |  |  | 5,967,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandTwoHundredEightySevenFederalHomeLoanMortgageCorporationPool3Point00Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,410 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,410,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandFourHundredTenFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandFourHundredTenFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 5,925,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandFourHundredTenFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,702 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,702,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandSevenHundredTwoFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandSevenHundredTwoFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 5,867,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandSevenHundredTwoFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,361 Government National Mortgage Association Pool, 4.54% 2062-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,361,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandThreeHundredSixtyOneGovernmentNationalMortgageAssociationPool4Point54Percent206211Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.54%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandThreeHundredSixtyOneGovernmentNationalMortgageAssociationPool4Point54Percent206211Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2062-11 | [1],[6],[7],[8]
Fair Value |  |  | 5,859,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandThreeHundredSixtyOneGovernmentNationalMortgageAssociationPool4Point54Percent206211Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,241 Government National Mortgage Association Pool, 4.58% 2062-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,241,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandTwoHundredFortyOneGovernmentNationalMortgageAssociationPool4Point58Percent206210Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.58%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandTwoHundredFortyOneGovernmentNationalMortgageAssociationPool4Point58Percent206210Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2062-10 | [1],[6],[7],[8]
Fair Value |  |  | 5,733,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandTwoHundredFortyOneGovernmentNationalMortgageAssociationPool4Point58Percent206210Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,234 Government National Mortgage Association Pool, 4.63% 2061-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,234,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandTwoHundredThirtyFourGovernmentNationalMortgageAssociationPool4Point63Percent206106Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.63%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandTwoHundredThirtyFourGovernmentNationalMortgageAssociationPool4Point63Percent206106Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2061-06 | [1],[6],[7],[8]
Fair Value |  |  | 5,688,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandTwoHundredThirtyFourGovernmentNationalMortgageAssociationPool4Point63Percent206106Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,978 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,978,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandNineHundredSeventyEightFederalHomeLoanMortgageCorporationPool3Point00Percent204304Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandNineHundredSeventyEightFederalHomeLoanMortgageCorporationPool3Point00Percent204304Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-04 | [1],[6],[7],[8]
Fair Value |  |  | 5,676,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandNineHundredSeventyEightFederalHomeLoanMortgageCorporationPool3Point00Percent204304Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,189 Government National Mortgage Association Pool, 4.60% 2062-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,189,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandOneHundredEightyNineGovernmentNationalMortgageAssociationPool4Point60Percent206206Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.60%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandOneHundredEightyNineGovernmentNationalMortgageAssociationPool4Point60Percent206206Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2062-06 | [1],[6],[7],[8]
Fair Value |  |  | 5,672,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandOneHundredEightyNineGovernmentNationalMortgageAssociationPool4Point60Percent206206Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,338 Federal National Mortgage Association Pool, 4.50% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,338,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandThreeHundredThirtyEightFederalNationalMortgageAssociationPool4Point50Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandThreeHundredThirtyEightFederalNationalMortgageAssociationPool4Point50Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-11 | [1],[6],[7],[8]
Fair Value |  |  | 5,668,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandThreeHundredThirtyEightFederalNationalMortgageAssociationPool4Point50Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,274 Federal National Mortgage Association Pool, 4.00% 2026-07 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,274,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandTwoHundredSeventyFourFederalNationalMortgageAssociationPool4Point00Percent202607Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandTwoHundredSeventyFourFederalNationalMortgageAssociationPool4Point00Percent202607Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2026-07 | [1],[6],[7],[8]
Fair Value |  |  | 5,593,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandTwoHundredSeventyFourFederalNationalMortgageAssociationPool4Point00Percent202607Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,147 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,147,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandOneHundredFortySevenFederalHomeLoanMortgageCorporationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandOneHundredFortySevenFederalHomeLoanMortgageCorporationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 5,460,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandOneHundredFortySevenFederalHomeLoanMortgageCorporationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,130 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,130,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandOneHundredThirtyFederalHomeLoanMortgageCorporationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandOneHundredThirtyFederalHomeLoanMortgageCorporationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 5,442,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandOneHundredThirtyFederalHomeLoanMortgageCorporationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,904 Federal National Mortgage Association Pool, 4.00% 2043-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,904,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandNineHundredFourFederalNationalMortgageAssociationPool4Point00Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandNineHundredFourFederalNationalMortgageAssociationPool4Point00Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-01 | [1],[6],[7],[8]
Fair Value |  |  | 5,063,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandNineHundredFourFederalNationalMortgageAssociationPool4Point00Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,484 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,484,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFourHundredEightyFourFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFourHundredEightyFourFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 4,897,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFourHundredEightyFourFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,720 Federal National Mortgage Association Pool, 4.00% 2042-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,720,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandSevenHundredTwentyFederalNationalMortgageAssociationPool4Point00Percent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandSevenHundredTwentyFederalNationalMortgageAssociationPool4Point00Percent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2042-04 | [1],[6],[7],[8]
Fair Value |  |  | 4,873,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandSevenHundredTwentyFederalNationalMortgageAssociationPool4Point00Percent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,032 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 5,032,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandThirtyTwoFederalHomeLoanMortgageCorporationPool3Point00Percent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandThirtyTwoFederalHomeLoanMortgageCorporationPool3Point00Percent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-06 | [1],[6],[7],[8]
Fair Value |  |  | 4,776,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandThirtyTwoFederalHomeLoanMortgageCorporationPool3Point00Percent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,472 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,472,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFourHundredSeventyTwoFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFourHundredSeventyTwoFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 4,768,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFourHundredSeventyTwoFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,604 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,604,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandSixHundredFourFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandSixHundredFourFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-11 | [1],[6],[7],[8]
Fair Value |  |  | 4,758,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandSixHundredFourFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,477 Federal National Mortgage Association Pool, 4.50% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,477,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFourHundredSeventySevenFederalNationalMortgageAssociationPool4Point50Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFourHundredSeventySevenFederalNationalMortgageAssociationPool4Point50Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 4,754,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFourHundredSeventySevenFederalNationalMortgageAssociationPool4Point50Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,581 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,581,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandFiveHundredEightyOneFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandFiveHundredEightyOneFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 4,715,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandFiveHundredEightyOneFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,359 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-09 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,359,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandThreeHundredFiftyNineFederalHomeLoanMortgageCorporationPool4Point50Percent204309Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandThreeHundredFiftyNineFederalHomeLoanMortgageCorporationPool4Point50Percent204309Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-09 | [1],[6],[7],[8]
Fair Value |  |  | 4,625,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandThreeHundredFiftyNineFederalHomeLoanMortgageCorporationPool4Point50Percent204309Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,604 Federal National Mortgage Association Pool, 3.50% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,604,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandSixHundredFourFederalNationalMortgageAssociationPool3Point50Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandSixHundredFourFederalNationalMortgageAssociationPool3Point50Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 4,586,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandSixHundredFourFederalNationalMortgageAssociationPool3Point50Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,673 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-02 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,673,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandSixHundredSeventyThreeFederalHomeLoanMortgageCorporationPool3Point00Percent204302Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandSixHundredSeventyThreeFederalHomeLoanMortgageCorporationPool3Point00Percent204302Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-02 | [1],[6],[7],[8]
Fair Value |  |  | 4,435,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandSixHundredSeventyThreeFederalHomeLoanMortgageCorporationPool3Point00Percent204302Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,060 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,060,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandSixtyFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandSixtyFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 4,423,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandSixtyFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,025 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,025,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandTwentyFiveFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandTwentyFiveFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 4,387,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandTwentyFiveFederalNationalMortgageAssociationPool5Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,231 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,231,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandTwoHundredThirtyOneFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandTwoHundredThirtyOneFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-11 | [1],[6],[7],[8]
Fair Value |  |  | 4,372,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandTwoHundredThirtyOneFederalNationalMortgageAssociationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,932 Government National Mortgage Association Pool, 4.69% 2061-07 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,932,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandNineHundredThirtyTwoGovernmentNationalMortgageAssociationPool4Point69Percent206107Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.69%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandNineHundredThirtyTwoGovernmentNationalMortgageAssociationPool4Point69Percent206107Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2061-07 | [1],[6],[7],[8]
Fair Value |  |  | 4,288,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandNineHundredThirtyTwoGovernmentNationalMortgageAssociationPool4Point69Percent206107Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,886 Government National Mortgage Association Pool, 4.75% 2061-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,886,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredEightySixGovernmentNationalMortgageAssociationPool4Point75Percent206101Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.75%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredEightySixGovernmentNationalMortgageAssociationPool4Point75Percent206101Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2061-01 | [1],[6],[7],[8]
Fair Value |  |  | 4,213,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredEightySixGovernmentNationalMortgageAssociationPool4Point75Percent206101Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,864 Federal National Mortgage Association Pool, 5.00% 2040-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,864,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredSixtyFourFederalNationalMortgageAssociationPool5Point00Percent204011Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredSixtyFourFederalNationalMortgageAssociationPool5Point00Percent204011Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2040-11 | [1],[6],[7],[8]
Fair Value |  |  | 4,203,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredSixtyFourFederalNationalMortgageAssociationPool5Point00Percent204011Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,811 Federal National Mortgage Association Pool, 5.00% 2044-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,811,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredElevenFederalNationalMortgageAssociationPool5Point00Percent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredElevenFederalNationalMortgageAssociationPool5Point00Percent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2044-01 | [1],[6],[7],[8]
Fair Value |  |  | 4,169,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredElevenFederalNationalMortgageAssociationPool5Point00Percent204401Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,826 Government National Mortgage Association Pool, 4.80% 2061-02 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,826,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredTwentySixGovernmentNationalMortgageAssociationPool4Point80Percent206102Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.80%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredTwentySixGovernmentNationalMortgageAssociationPool4Point80Percent206102Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2061-02 | [1],[6],[7],[8]
Fair Value |  |  | 4,157,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredTwentySixGovernmentNationalMortgageAssociationPool4Point80Percent206102Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,225 Federal Home Loan Mortgage Corporation Pool, 3.50% 2043-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,225,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandTwoHundredTwentyFiveFederalHomeLoanMortgageCorporationPool3Point50Percent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandTwoHundredTwentyFiveFederalHomeLoanMortgageCorporationPool3Point50Percent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-06 | [1],[6],[7],[8]
Fair Value |  |  | 4,137,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandTwoHundredTwentyFiveFederalHomeLoanMortgageCorporationPool3Point50Percent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,929 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,929,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandNineHundredTwentyNineFederalHomeLoanMortgageCorporationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandNineHundredTwentyNineFederalHomeLoanMortgageCorporationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 4,043,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandNineHundredTwentyNineFederalHomeLoanMortgageCorporationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,801 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,801,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandEightHundredOneFederalHomeLoanMortgageCorporationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandEightHundredOneFederalHomeLoanMortgageCorporationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-11 | [1],[6],[7],[8]
Fair Value |  |  | 3,885,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandEightHundredOneFederalHomeLoanMortgageCorporationPool4Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,599 Federal National Mortgage Association Pool, 4.50% 2043-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,599,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFiveHundredNinetyNineFederalNationalMortgageAssociationPool4Point50Percent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFiveHundredNinetyNineFederalNationalMortgageAssociationPool4Point50Percent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-12 | [1],[6],[7],[8]
Fair Value |  |  | 3,837,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFiveHundredNinetyNineFederalNationalMortgageAssociationPool4Point50Percent204312Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,737 Federal Home Loan Mortgage Corporation Pool, 3.00% 2028-03 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,737,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSevenHundredThirtySevenFederalHomeLoanMortgageCorporationPool3Point00Percent202803Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSevenHundredThirtySevenFederalHomeLoanMortgageCorporationPool3Point00Percent202803Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2028-03 | [1],[6],[7],[8]
Fair Value |  |  | 3,810,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSevenHundredThirtySevenFederalHomeLoanMortgageCorporationPool3Point00Percent202803Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,434 Government National Mortgage Association Pool, 4.66% 2063-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,434,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFourHundredThirtyFourGovernmentNationalMortgageAssociationPool4Point66Percent206301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.66%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFourHundredThirtyFourGovernmentNationalMortgageAssociationPool4Point66Percent206301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2063-01 | [1],[6],[7],[8]
Fair Value |  |  | 3,772,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFourHundredThirtyFourGovernmentNationalMortgageAssociationPool4Point66Percent206301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,448 Federal National Mortgage Association Pool, 5.00% 2040-12 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,448,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFourHundredFortyEightFederalNationalMortgageAssociationPool5Point00Percent204012Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFourHundredFortyEightFederalNationalMortgageAssociationPool5Point00Percent204012Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2040-12 | [1],[6],[7],[8]
Fair Value |  |  | 3,759,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFourHundredFortyEightFederalNationalMortgageAssociationPool5Point00Percent204012Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,601 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,601,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSixHundredOneFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSixHundredOneFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 3,715,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSixHundredOneFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,594 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,594,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFiveHundredNinetyFourFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFiveHundredNinetyFourFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 3,710,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFiveHundredNinetyFourFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,566 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,566,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFiveHundredSixtySixFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFiveHundredSixtySixFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 3,683,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFiveHundredSixtySixFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,400 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,400,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFourHundredFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFourHundredFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 3,613,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFourHundredFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,495 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,495,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFourHundredNinetyFiveFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFourHundredNinetyFiveFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 3,608,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFourHundredNinetyFiveFederalNationalMortgageAssociationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,273 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,273,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandTwoHundredSeventyThreeFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandTwoHundredSeventyThreeFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 3,479,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandTwoHundredSeventyThreeFederalNationalMortgageAssociationPool4Point50Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,515 Federal Home Loan Mortgage Corporation Pool, 3.50% 2043-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,515,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFiveHundredFifteenFederalHomeLoanMortgageCorporationPool3Point50Percent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFiveHundredFifteenFederalHomeLoanMortgageCorporationPool3Point50Percent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-06 | [1],[6],[7],[8]
Fair Value |  |  | 3,454,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFiveHundredFifteenFederalHomeLoanMortgageCorporationPool3Point50Percent204306Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,111 Federal National Mortgage Association Pool, 5.00% 2035-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,111,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandOneHundredElevenFederalNationalMortgageAssociationPool5Point00Percent203510Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandOneHundredElevenFederalNationalMortgageAssociationPool5Point00Percent203510Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2035-10 | [1],[6],[7],[8]
Fair Value |  |  | 3,429,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandOneHundredElevenFederalNationalMortgageAssociationPool5Point00Percent203510Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,134 Government National Mortgage Association Pool, 4.68% 2061-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,134,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandOneHundredThirtyFourGovernmentNationalMortgageAssociationPool4Point68Percent206110Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.68%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandOneHundredThirtyFourGovernmentNationalMortgageAssociationPool4Point68Percent206110Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2061-10 | [1],[6],[7],[8]
Fair Value |  |  | 3,421,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandOneHundredThirtyFourGovernmentNationalMortgageAssociationPool4Point68Percent206110Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,094 Government National Mortgage Association Pool, 5.54% 2060-02 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,094,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandNinetyFourGovernmentNationalMortgageAssociationPool5Point54Percent206002Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Government National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.54%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandNinetyFourGovernmentNationalMortgageAssociationPool5Point54Percent206002Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2060-02 | [1],[6],[7],[8]
Fair Value |  |  | 3,420,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandNinetyFourGovernmentNationalMortgageAssociationPool5Point54Percent206002Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,469 Federal National Mortgage Association Pool, 3.50% 2042-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,469,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFourHundredSixtyNineFederalNationalMortgageAssociationPool3Point50Percent204206Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFourHundredSixtyNineFederalNationalMortgageAssociationPool3Point50Percent204206Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2042-06 | [1],[6],[7],[8]
Fair Value |  |  | 3,419,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFourHundredSixtyNineFederalNationalMortgageAssociationPool3Point50Percent204206Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,387 Federal Home Loan Mortgage Corporation Pool, 3.00% 2028-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,387,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandThreeHundredEightySevenFederalHomeLoanMortgageCorporationPool3Point00Percent202806Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandThreeHundredEightySevenFederalHomeLoanMortgageCorporationPool3Point00Percent202806Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2028-06 | [1],[6],[7],[8]
Fair Value |  |  | 3,412,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandThreeHundredEightySevenFederalHomeLoanMortgageCorporationPool3Point00Percent202806Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,421 Federal National Mortgage Association Pool, 3.50% 2043-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,421,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandFourHundredTwentyOneFederalNationalMortgageAssociationPool3Point50Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandFourHundredTwentyOneFederalNationalMortgageAssociationPool3Point50Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-01 | [1],[6],[7],[8]
Fair Value |  |  | 3,407,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandFourHundredTwentyOneFederalNationalMortgageAssociationPool3Point50Percent204301Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,170 Federal National Mortgage Association Pool, 4.00% 2026-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,170,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandOneHundredSeventyFederalNationalMortgageAssociationPool4Point00Percent202606Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandOneHundredSeventyFederalNationalMortgageAssociationPool4Point00Percent202606Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2026-06 | [1],[6],[7],[8]
Fair Value |  |  | 3,362,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandOneHundredSeventyFederalNationalMortgageAssociationPool4Point00Percent202606Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,200 Federal National Mortgage Association Pool, 3.50% 2028-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,200,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandTwoHundredFederalNationalMortgageAssociationPool3Point50Percent202811Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandTwoHundredFederalNationalMortgageAssociationPool3Point50Percent202811Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2028-11 | [1],[6],[7],[8]
Fair Value |  |  | 3,355,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandTwoHundredFederalNationalMortgageAssociationPool3Point50Percent202811Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,194 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,194,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandOneHundredNinetyFourFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandOneHundredNinetyFourFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-08 | [1],[6],[7],[8]
Fair Value |  |  | 3,294,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandOneHundredNinetyFourFederalHomeLoanMortgageCorporationPool4Point00Percent204308Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,203 Federal National Mortgage Association Pool, 3.00% 2028-06 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,203,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandTwoHundredThreeFederalNationalMortgageAssociationPool3Point00Percent202806Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandTwoHundredThreeFederalNationalMortgageAssociationPool3Point00Percent202806Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2028-06 | [1],[6],[7],[8]
Fair Value |  |  | 3,274,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandTwoHundredThreeFederalNationalMortgageAssociationPool3Point00Percent202806Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,981 Federal National Mortgage Association Pool, 5.00% 2043-11 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 2,981,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_TwoThousandNineHundredEightyOneFederalNationalMortgageAssociationPool5Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_TwoThousandNineHundredEightyOneFederalNationalMortgageAssociationPool5Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-11 | [1],[6],[7],[8]
Fair Value |  |  | 3,261,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_TwoThousandNineHundredEightyOneFederalNationalMortgageAssociationPool5Point00Percent204311Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,218 Federal National Mortgage Association Pool, 3.00% 2028-03 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,218,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandTwoHundredEighteenFederalNationalMortgageAssociationPool3Point00Percent202803Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandTwoHundredEighteenFederalNationalMortgageAssociationPool3Point00Percent202803Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2028-03 | [1],[6],[7],[8]
Fair Value |  |  | 3,249,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandTwoHundredEighteenFederalNationalMortgageAssociationPool3Point00Percent202803Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,142 Federal National Mortgage Association Pool, 4.00% 2043-10 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,142,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandOneHundredFortyTwoFederalNationalMortgageAssociationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandOneHundredFortyTwoFederalNationalMortgageAssociationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-10 | [1],[6],[7],[8]
Fair Value |  |  | 3,247,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandOneHundredFortyTwoFederalNationalMortgageAssociationPool4Point00Percent204310Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,124 Federal National Mortgage Association Pool, 3.00% 2028-07 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,124,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandOneHundredTwentyFourFederalNationalMortgageAssociationPool3Point00Percent202807Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandOneHundredTwentyFourFederalNationalMortgageAssociationPool3Point00Percent202807Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2028-07 | [1],[6],[7],[8]
Fair Value |  |  | 3,193,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandOneHundredTwentyFourFederalNationalMortgageAssociationPool3Point00Percent202807Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,998 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-09 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 2,998,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_TwoThousandNineHundredNinetyEightFederalHomeLoanMortgageCorporationPool4Point50Percent204309Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_TwoThousandNineHundredNinetyEightFederalHomeLoanMortgageCorporationPool4Point50Percent204309Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2043-09 | [1],[6],[7],[8]
Fair Value |  |  | 3,191,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_TwoThousandNineHundredNinetyEightFederalHomeLoanMortgageCorporationPool4Point50Percent204309Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,996 Federal National Mortgage Association Pool, 4.50% 2042-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 2,996,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_TwoThousandNineHundredNinetySixFederalNationalMortgageAssociationPool4Point50Percent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_TwoThousandNineHundredNinetySixFederalNationalMortgageAssociationPool4Point50Percent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2042-04 | [1],[6],[7],[8]
Fair Value |  |  | 3,182,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_TwoThousandNineHundredNinetySixFederalNationalMortgageAssociationPool4Point50Percent204204Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 1.20%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[2],[3],[4],[5] | 3.06%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[2],[6],[7],[8]
Fair Value | 9,441,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 19,132,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 56,737,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 97,796,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Federal National Mortgage Association | [1],[3],[4],[5] | Other Federal National Mortgage Association | [1],[6],[7],[8]
Fair Value | 6,971,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 13,821,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4],[5] | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity | 2020-12 | [1],[3],[4],[5] | 2020-12 | [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 5.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4],[5] | 5.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity | 2043-06 | [1],[3],[4],[5] | 2043-06 | [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 16,165,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 21,959,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Federal Home Loan Mortgage Corporation | [1],[3],[4],[5] | Other Federal Home Loan Mortgage Corporation | [1],[6],[7],[8]
Fair Value | 2,009,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 3,577,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 3.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4],[5] | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity | 2032-12 | [1],[3],[4],[5] | 2032-12 | [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 5.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4],[5] | 5.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity | 2040-03 | [1],[3],[4],[5] | 2043-01 | [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 2,142,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 10,460,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Government National Mortgage Association | [1],[3],[4],[5] | Other Government National Mortgage Association | [1],[6],[7],[8]
Rate | 4.75%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2040-07 | [1],[3],[4],[5] |  |
Fair Value | 461,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 1,734,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity |  |  | 2036-03 | [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate |  |  | 5.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFixedRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity |  |  | 2042-11 | [1],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 9.18%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[2],[3],[4],[5] | 15.47%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[2],[6],[7],[8]
Current Principal/Notional Amount | 71,598,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember |  | 101,150,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember |
Fair Value | 72,410,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 96,856,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association (30 Year) [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 44,478,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FederalNationalMortgageAssociation30YearMember / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal National Mortgage Association (30 Year) | [1],[3],[4],[5] |  |
Rate | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FederalNationalMortgageAssociation30YearMember / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2015-01 | [1],[3],[4],[5] |  |
Fair Value | 45,015,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FederalNationalMortgageAssociation30YearMember / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
TBA - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation (30 Year) [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 27,120,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FederalHomeLoanMortgageCorporation30YearMember / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation (30 Year) | [1],[3],[4],[5] |  |
Rate | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FederalHomeLoanMortgageCorporation30YearMember / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2015-01 | [1],[3],[4],[5] |  |
Fair Value | 27,395,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FederalHomeLoanMortgageCorporation30YearMember / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
TBA - Fixed Rate Agency Securities [Member] | 63,300 Federal Home Loan Mortgage Corporation (30 Year) 3.00% 2014-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 63,300,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixtyThreeThousandThreeHundredFederalHomeLoanMortgageCorporation30Year3Point00Percent201401Member / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation (30 Year) | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixtyThreeThousandThreeHundredFederalHomeLoanMortgageCorporation30Year3Point00Percent201401Member / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2014-01 | [1],[6],[7],[8]
Fair Value |  |  | 60,016,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixtyThreeThousandThreeHundredFederalHomeLoanMortgageCorporation30Year3Point00Percent201401Member / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] | 31,150 Federal National Mortgage Association (30 Year) 3.00% 2014-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 31,150,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThirtyOneThousandOneHundredFiftyFederalNationalMortgageAssociation30Year3Point00Percent201401Member / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association (30 Year) | [1],[6],[7],[8]
Rate |  |  | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThirtyOneThousandOneHundredFiftyFederalNationalMortgageAssociation30Year3Point00Percent201401Member / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2014-01 | [1],[6],[7],[8]
Fair Value |  |  | 29,612,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThirtyOneThousandOneHundredFiftyFederalNationalMortgageAssociation30Year3Point00Percent201401Member / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] | 6,700 Federal Home Loan Mortgage Corporation (30 Year) 5.00% 2014-01 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,700,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandSevenHundredFederalHomeLoanMortgageCorporation30Year5Point00Percent201401Member / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation (30 Year) | [1],[6],[7],[8]
Rate |  |  | 5.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandSevenHundredFederalHomeLoanMortgageCorporation30Year5Point00Percent201401Member / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2014-01 | [1],[6],[7],[8]
Fair Value |  |  | 7,228,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandSevenHundredFederalHomeLoanMortgageCorporation30Year5Point00Percent201401Member / us-gaap_InvestmentTypeAxis = efc_ToBeAnnouncedFixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Fixed Rate Agency Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 158.20%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_FixedRateAgencySecuritiesMember | [1],[2],[3],[4],[5] | 156.28%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_FixedRateAgencySecuritiesMember | [1],[2],[6],[7],[8]
Fair Value | 1,247,493,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_FixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 978,356,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_FixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned, at Cost | 1,230,414,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_FixedRateAgencySecuritiesMember | [1],[3],[4],[5] | 992,207,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_FixedRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 2.62%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[2],[3],[4],[5] | 4.89%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[2],[6],[7],[8]
Fair Value | 20,647,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 30,618,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 6,265,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 3,667,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Federal National Mortgage Association Pools | [1],[3],[4],[5] | Other Federal National Mortgage Association Pools | [1],[6],[7],[8]
Fair Value | 6,692,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 3,900,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 5.04%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4],[5] | 2.64%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity | 2035-09 | [1],[3],[4],[5] | 2036-04 | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 6.05%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4],[5] | 6.05%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity | 2037-09 | [1],[3],[4],[5] | 2037-09 | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 4,653,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 3,148,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Federal Home Loan Mortgage Corporation Pools | [1],[3],[4],[5] | Other Federal Home Loan Mortgage Corporation Pools | [1],[6],[7],[8]
Fair Value | 4,876,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 3,341,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 2.36%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4],[5] | 5.83%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity | 2037-06 | [1],[3],[4],[5] | 2037-06 | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 5.94%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4],[5] | 5.89%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity | 2044-05 | [1],[3],[4],[5] | 2037-07 | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 3,404,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Other Government National Mortgage Association Pool | [1],[3],[4],[5] |  |
Rate | 2.47%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2064-11 | [1],[3],[4],[5] |  |
Fair Value | 3,673,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationPoolsMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Floating Rate Agency Securities [Member] | 5,085 Federal Home Loan Mortgage Corporation Pool 4.92% 2038-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,084,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FiveThousandandEightyFiveFederalHomeLoanMortgageCorporationPoolFourPointNineTwoPercent203804Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Investment Owned Description | Federal Home Loan Mortgage Corporation Pool | [1],[3],[4],[5] |  |
Rate | 4.92%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FiveThousandandEightyFiveFederalHomeLoanMortgageCorporationPoolFourPointNineTwoPercent203804Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Maturity | 2038-04 | [1],[3],[4],[5] |  |
Fair Value | 5,406,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FiveThousandandEightyFiveFederalHomeLoanMortgageCorporationPoolFourPointNineTwoPercent203804Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] |  |
Principal And Interest - Floating Rate Agency Securities [Member] | 6,281 Federal Home Loan Mortgage Corporation Pool, 4.92% 2038-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 6,281,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SixThousandTwoHundredEightyOneFederalHomeLoanMortgageCorporationPool4Point92Percent203804Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal Home Loan Mortgage Corporation Pool | [1],[6],[7],[8]
Rate |  |  | 4.92%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_SixThousandTwoHundredEightyOneFederalHomeLoanMortgageCorporationPool4Point92Percent203804Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2038-04 | [1],[6],[7],[8]
Fair Value |  |  | 6,709,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SixThousandTwoHundredEightyOneFederalHomeLoanMortgageCorporationPool4Point92Percent203804Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 4,935 Federal National Mortgage Association Pool, 4.27% 2040-04 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 4,935,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_FourThousandNineHundredThirtyFiveFederalNationalMortgageAssociationPool4Point27Percent204004Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 4.27%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_FourThousandNineHundredThirtyFiveFederalNationalMortgageAssociationPool4Point27Percent204004Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2040-04 | [1],[6],[7],[8]
Fair Value |  |  | 5,256,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_FourThousandNineHundredThirtyFiveFederalNationalMortgageAssociationPool4Point27Percent204004Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 3,674 Federal National Mortgage Association Pool, 5.73% 2037-07 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,674,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSixHundredSeventyFourFederalNationalMortgageAssociationPool5Point73Percent203707Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 5.73%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSixHundredSeventyFourFederalNationalMortgageAssociationPool5Point73Percent203707Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2037-07 | [1],[6],[7],[8]
Fair Value |  |  | 3,937,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSixHundredSeventyFourFederalNationalMortgageAssociationPool5Point73Percent203707Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 3,646 Federal National Mortgage Association Pool, 2.53% 2038-05 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,646,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandSixHundredFortySixFederalNationalMortgageAssociationPool2Point53Percent203805Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 2.53%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandSixHundredFortySixFederalNationalMortgageAssociationPool2Point53Percent203805Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2038-05 | [1],[6],[7],[8]
Fair Value |  |  | 3,878,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandSixHundredFortySixFederalNationalMortgageAssociationPool2Point53Percent203805Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 3,395 Federal National Mortgage Association Pool, 6.1% 2037-08 [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 3,395,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ThreeThousandThreeHundredNinetyFiveFederalNationalMortgageAssociationPool6Point1Percent203708Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description |  |  | Federal National Mortgage Association Pool | [1],[6],[7],[8]
Rate |  |  | 6.10%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ThreeThousandThreeHundredNinetyFiveFederalNationalMortgageAssociationPool6Point1Percent203708Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Maturity |  |  | 2037-08 | [1],[6],[7],[8]
Fair Value |  |  | 3,597,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ThreeThousandThreeHundredNinetyFiveFederalNationalMortgageAssociationPool6Point1Percent203708Member / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 2.78%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[2],[3],[4],[5] | 3.41%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[2],[6],[7],[8]
Fair Value | 21,944,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 21,372,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 28,251,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 25,322,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Federal National Mortgage Association | [1],[3],[4],[5] | Other Federal National Mortgage Association | [1],[6],[7],[8]
Fair Value | 4,508,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 4,600,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 5.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4],[5] | 5.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity | 2035-04 | [1],[3],[4],[5] | 2036-08 | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 6.58%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4],[5] | 6.59%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity | 2043-07 | [1],[3],[4],[5] | 2043-07 | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 13,048,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 18,180,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Federal Home Loan Mortgage Corporation | [1],[3],[4],[5] | Other Federal Home Loan Mortgage Corporation | [1],[6],[7],[8]
Fair Value | 1,872,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 2,433,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 5.84%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4],[5] | 5.83%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity | 2036-03 | [1],[3],[4],[5] | 2038-11 | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 6.47%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4],[5] | 6.53%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherFederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity | 2039-08 | [1],[3],[4],[5] | 2039-08 | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 183,794,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 108,194,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned Description | Other Government National Mortgage Association | [1],[3],[4],[5] | Other Government National Mortgage Association | [1],[6],[7],[8]
Fair Value | 13,591,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 11,987,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 0.40%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4],[5] | 1.64%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7],[8]
Maturity | 2042-11 | [1],[3],[4],[5] | 2042-11 | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 6.58%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4],[5] | 6.58%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_OtherGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7],[8]
Maturity | 2063-10 | [1],[3],[4],[5] | 2063-08 | [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Resecuritization of Government National Mortgage Association [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 21,145,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ResecuritizationOfGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[3],[4],[5],[9] | 22,796,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_ResecuritizationOfGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[6],[7],[8],[9]
Investment Owned Description | Resecuritization of Government National Mortgage Association (w) | [1],[3],[4],[5],[9] | Resecuritization of Government National Mortgage Association (t) | [1],[6],[7],[8],[9]
Rate | 4.34%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ResecuritizationOfGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[3],[4],[5],[9] | 4.34%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_ResecuritizationOfGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[6],[7],[8],[9]
Maturity | 2060-08 | [1],[3],[4],[5],[9] | 2060-08 | [1],[6],[7],[8],[9]
Fair Value | 1,973,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ResecuritizationOfGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[3],[4],[5],[9] | 2,352,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_ResecuritizationOfGovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyFloatingRateAgencySecuritiesMember | [1],[6],[7],[8],[9]
Floating Rate Agency Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 5.40%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_FloatingRateAgencySecuritiesMember | [1],[2],[3],[4],[5] | 8.30%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_FloatingRateAgencySecuritiesMember | [1],[2],[6],[7],[8]
Fair Value | 42,591,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_FloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 51,990,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_FloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned, at Cost | 41,787,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_FloatingRateAgencySecuritiesMember | [1],[3],[4],[5] | 50,969,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_FloatingRateAgencySecuritiesMember | [1],[6],[7],[8]
Agency Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 163.60%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = us-gaap_AgencySecuritiesMember | [1],[2],[3],[4],[5] | 164.58%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = us-gaap_AgencySecuritiesMember | [1],[2],[6],[7],[8]
Fair Value | 1,290,084,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = us-gaap_AgencySecuritiesMember | [1],[3],[4],[5] | 1,030,346,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = us-gaap_AgencySecuritiesMember | [1],[6],[7],[8]
Investment Owned, at Cost | 1,272,201,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = us-gaap_AgencySecuritiesMember | [1],[3],[4],[5] | 1,043,176,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = us-gaap_AgencySecuritiesMember | [1],[6],[7],[8]
Principal And Interest - Private Label Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 76.95%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember | [1],[2],[3],[4] | 97.40%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember | [1],[2],[6],[7]
Fair Value | 606,757,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember | [1],[3],[4] | 609,766,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember | [1],[6],[7]
Investment Owned, at Cost | 571,834,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember | [1],[3],[4] | 555,708,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember | [1],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 963,038,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember | [1],[3],[4] | 920,032,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember | [1],[6],[7]
Investment Owned Description | Various | [1],[3],[4] | Various | [1],[6],[7]
Fair Value | 606,757,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember | [1],[3],[4] | 609,766,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember | [1],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4] | 0.24%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7]
Maturity | 2015-07 | [1],[3],[4] | 2019-05 | [1],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 12.25%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4] | 9.35%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalAndInterestPrivateLabelSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7]
Maturity | 2061-01 | [1],[3],[4] | 2050-06 | [1],[6],[7]
Principal Only - Private Label Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 0.41%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[2],[3],[4] | 0.45%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[2],[6],[7]
Fair Value | 3,248,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[3],[4] | 2,784,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[6],[7]
Investment Owned, at Cost | 2,737,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[3],[4] | 2,477,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[6],[7]
Principal Only - Private Label Securities [Member] | Various Issuer [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 5,800,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[3],[4] | 5,800,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[6],[7]
Investment Owned Description | Various | [1],[3],[4] | Various | [1],[6],[7]
Rate | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[3],[4] | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[6],[7]
Maturity | 2030-08 | [1],[3],[4] | 2030-08 | [1],[6],[7]
Fair Value | 3,248,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[3],[4] | 2,784,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_PrincipalOnlyPrivateLabelSecuritiesMember | [1],[6],[7]
Interest Only - Private Label Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 0.31%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember | [1],[2],[3],[4] | 0.19%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember | [1],[2],[6],[7]
Fair Value | 2,423,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember | [1],[3],[4] | 1,216,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember | [1],[6],[7]
Investment Owned, at Cost | 1,602,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember | [1],[3],[4] | 519,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember | [1],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 65,223,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember | [1],[3],[4] | 50,649,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember | [1],[6],[7]
Investment Owned Description | Various | [1],[3],[4] | Various | [1],[6],[7]
Fair Value | 2,423,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember | [1],[3],[4] | 1,216,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember | [1],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 0.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4] | 0.50%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7]
Maturity | 2044-06 | [1],[3],[4] | 2044-06 | [1],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 2.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4] | 2.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_InterestOnlyPrivateLabelSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7]
Maturity | 2047-12 | [1],[3],[4] | 2047-09 | [1],[6],[7]
Other Private Label Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 0.00%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[2],[3],[4] | 0.00%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[2],[6],[7]
Fair Value | 0 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[3],[4] | 0 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[6],[7]
Investment Owned, at Cost | 302,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[3],[4] | 345,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 111,629,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[3],[4] | 127,491,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[6],[7]
Investment Owned Description | Various | [1],[3],[4] | Various | [1],[6],[7]
Rate | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[3],[4] | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[6],[7]
Fair Value | 0 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[3],[4] | 0 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_OtherPrivateLabelSecuritiesMember | [1],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Maturity | 2037-06 | [1],[3],[4] | 2037-06 | [1],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Maturity | 2047-10 | [1],[3],[4] | 2045-07 | [1],[6],[7]
Private Label Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 77.67%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_PrivateLabelSecuritiesMember | [1],[2],[3],[4] | 98.04%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_PrivateLabelSecuritiesMember | [1],[2],[6],[7]
Fair Value | 612,428,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_PrivateLabelSecuritiesMember | [1],[3],[4] | 613,766,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_PrivateLabelSecuritiesMember | [1],[6],[7]
Investment Owned, at Cost | 576,475,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_PrivateLabelSecuritiesMember | [1],[3],[4] | 559,049,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_PrivateLabelSecuritiesMember | [1],[6],[7]
Mortgage-Backed Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 241.27%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = us-gaap_MortgageBackedSecuritiesMember | [1],[2],[3],[4] | 262.62%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = us-gaap_MortgageBackedSecuritiesMember | [1],[2],[6],[7]
Fair Value | 1,902,512,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = us-gaap_MortgageBackedSecuritiesMember | [1],[3],[4] | 1,644,112,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = us-gaap_MortgageBackedSecuritiesMember | [1],[6],[7]
Investment Owned, at Cost | 1,848,676,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = us-gaap_MortgageBackedSecuritiesMember | [1],[3],[4] | 1,602,225,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = us-gaap_MortgageBackedSecuritiesMember | [1],[6],[7]
Other Asset-backed Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity |  |  | 6.08%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = us-gaap_AssetBackedSecuritiesMember | [1],[2],[6],[7]
Fair Value |  |  | 38,069,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = us-gaap_AssetBackedSecuritiesMember | [1],[6],[7]
Investment Owned, at Cost |  |  | 38,758,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = us-gaap_AssetBackedSecuritiesMember | [1],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount |  |  | 42,822,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = us-gaap_AssetBackedSecuritiesMember | [1],[6],[7]
Investment Owned Description |  |  | Various | [1],[6],[7]
Fair Value |  |  | 38,069,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = us-gaap_AssetBackedSecuritiesMember | [1],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate |  |  | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[6],[7]
Maturity |  |  | 2017-06 | [1],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate |  |  | 9.74%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[6],[7]
Maturity |  |  | 2040-12 | [1],[6],[7]
Other asset-backed securities and loans [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 18.55%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_AssetbackedsecuritiesandloansMember | [1],[2],[3],[4] |  |
Fair Value | 146,288,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_AssetbackedsecuritiesandloansMember | [1],[3],[4] |  |
Investment Owned, at Cost | 149,386,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_AssetbackedsecuritiesandloansMember | [1],[3],[4] |  |
Other asset-backed securities and loans [Member] | Various Issuer [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 169,458,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_AssetbackedsecuritiesandloansMember | [1],[3],[4] |  |
Investment Owned Description | Various | [1],[3],[4] |  |
Fair Value | 146,288,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_AssetbackedsecuritiesandloansMember | [1],[3],[4] |  |
Other asset-backed securities and loans [Member] | Various Issuer [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_AssetbackedsecuritiesandloansMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4] |  |
Maturity | 2015-06 | [1],[3],[4] |  |
Other asset-backed securities and loans [Member] | Various Issuer [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 49.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_AssetbackedsecuritiesandloansMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4] |  |
Maturity | 2068-09 | [1],[3],[4] |  |
Corporate Debt [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 5.41%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_CorporateDebtMember | [1],[2],[3],[4] |  |
Fair Value | 42,708,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_CorporateDebtMember | [1],[3],[4] |  |
Investment Owned, at Cost | 43,585,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_CorporateDebtMember | [1],[3],[4] |  |
Corporate Debt [Member] | Various Issuer [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 46,006,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CorporateDebtMember | [1],[3],[4] |  |
Investment Owned Description | Various | [1],[3],[4] |  |
Fair Value | 42,708,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CorporateDebtMember | [1],[3],[4] |  |
Corporate Debt [Member] | Various Issuer [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 5.25%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CorporateDebtMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[3],[4] |  |
Maturity | 2016-06 | [1],[3],[4] |  |
Corporate Debt [Member] | Various Issuer [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 15.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CorporateDebtMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[3],[4] |  |
Maturity | 2021-09 | [1],[3],[4] |  |
Commercial Mortgage Loans [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 3.59%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember | [1],[10],[2],[3],[4] | 3.82%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember | [1],[11],[2],[6],[7]
Fair Value | 28,309,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember | [1],[10],[3],[4] | 23,887,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember | [1],[11],[6],[7]
Investment Owned, at Cost | 28,266,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember | [1],[10],[3],[4] | 23,212,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember | [1],[11],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 32,519,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember | [1],[10],[3],[4] | 26,227,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember | [1],[11],[6],[7]
Investment Owned Description | Various | [1],[10],[3],[4] | Various | [1],[11],[6],[7]
Fair Value | 28,309,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember | [1],[10],[3],[4] | 23,887,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember | [1],[11],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[10],[3],[4] | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [1],[11],[6],[7]
Maturity | 2015-01 | [1],[10],[3],[4] | 2014-06 | [1],[11],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Rate | 10.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[10],[3],[4] | 7.25%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [1],[11],[6],[7]
Maturity | 2017-11 | [1],[10],[3],[4] | 2016-12 | [1],[11],[6],[7]
Residential Mortgage Loans [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 3.49%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[2],[3],[4] | 3.84%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[2],[6],[7]
Fair Value | 27,482,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[3],[4] | 24,062,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[6],[7]
Investment Owned, at Cost | 27,398,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[3],[4] | 24,062,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[6],[7]
Residential Mortgage Loans [Member] | Various Issuer [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 44,336,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[3],[4] | 36,218,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[6],[7]
Investment Owned Description | Various | [1],[3],[4] | Various | [1],[6],[7]
Rate | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[3],[4] | 0.00%invest_InvestmentInterestRate / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[6],[7]
Fair Value | 27,482,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[3],[4] | 24,062,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = us-gaap_ResidentialMortgageMember | [1],[6],[7]
Residential Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Maturity | 2018-02 | [1],[3],[4] | 2024-08 | [1],[6],[7]
Residential Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Maturity | 2054-10 | [1],[3],[4] | 2042-10 | [1],[6],[7]
Real Estate Owned [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 1.10%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = us-gaap_WhollyOwnedPropertiesMember | [1],[12],[2],[3],[4] |  |
Fair Value | 8,635,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = us-gaap_WhollyOwnedPropertiesMember | [1],[12],[3],[4] |  |
Investment Owned, at Cost | 8,748,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = us-gaap_WhollyOwnedPropertiesMember | [1],[12],[3],[4] |  |
Real Estate Owned [Member] | Single-Family Houses [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 50 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_SingleFamilyHousesMember / us-gaap_InvestmentTypeAxis = us-gaap_WhollyOwnedPropertiesMember | [1],[12],[3],[4] |  |
Investment Owned Description | Single-Family Houses | [1],[12],[3],[4] |  |
Fair Value | 6,591,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_SingleFamilyHousesMember / us-gaap_InvestmentTypeAxis = us-gaap_WhollyOwnedPropertiesMember | [1],[12],[3],[4] |  |
Real Estate Owned [Member] | Commercial Property [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 1 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = efc_CommercialPropertyMember / us-gaap_InvestmentTypeAxis = us-gaap_WhollyOwnedPropertiesMember | [1],[12],[3],[4] |  |
Investment Owned Description | Commercial Property | [1],[12],[3],[4] |  |
Fair Value | 2,044,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_CommercialPropertyMember / us-gaap_InvestmentTypeAxis = us-gaap_WhollyOwnedPropertiesMember | [1],[12],[3],[4] |  |
Private Corporate Investments [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 1.84%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[2],[3],[4] |  |
Fair Value | 14,512,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
Investment Owned, at Cost | 14,717,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
Private Corporate Investments [Member] | North America [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 1.84%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember |  |  |
Fair Value | 14,512,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember |  |  |
Investment Owned, at Cost | 14,717,000 us-gaap_InvestmentOwnedAtCost / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember |  |  |
Private Corporate Investments [Member] | Non-Exchange Traded Preferred Equity Investment in Commercial Mortgage-related Private Partnership |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment Owned Description | Non-Exchange Traded Preferred Equity Investment in Commercial Mortgage-Related Private Partnership | [1],[3],[4] |  |
Fair Value | 6,241,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_NonExchangeTradedPreferredEquityInvestmentinCommercialMortgagerelatedPrivatePartnershipMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
Investment Owned, Balance, Shares | 6,241 us-gaap_InvestmentOwnedBalanceShares / invest_InvestmentAxis = efc_NonExchangeTradedPreferredEquityInvestmentinCommercialMortgagerelatedPrivatePartnershipMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
Private Corporate Investments [Member] | Non-Exchange Traded Corporate Equity [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment Owned Description | Non-Exchange Traded Corporate Equity | [1],[3],[4] |  |
Fair Value | 2,860,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_NonExchangeTradedCorporateEquityMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
Investment Owned, Balance, Shares | 88 us-gaap_InvestmentOwnedBalanceShares / invest_InvestmentAxis = efc_NonExchangeTradedCorporateEquityMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
Private Corporate Investments [Member] | Non-controlling Interest in Mortgage-related Private Partnership [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment Owned Description | Non-Controlling Interest in Mortgage-Related Private Partnership | [1],[3],[4] |  |
Fair Value | 2,673,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_NoncontrollingInterestinMortgagerelatedPrivatePartnershipMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
Private Corporate Investments [Member] | Non-Exchange Traded Preferred Equity Investment in Mortgage Originators [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment Owned Description | Non-Exchange Traded Preferred Equity Investment in Mortgage Originators | [1],[3],[4] |  |
Fair Value | 2,500,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_NonExchangeTradedPreferredEquityInvestmentinMortgageOriginatorsMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
Investment Owned, Balance, Shares | 7,657 us-gaap_InvestmentOwnedBalanceShares / invest_InvestmentAxis = efc_NonExchangeTradedPreferredEquityInvestmentinMortgageOriginatorsMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
Private Corporate Investments [Member] | Non-Exchange Traded Equity Investment in Mortgage Originator |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment Owned Description | Non-Exchange Traded Equity Investment in Mortgage Originators | [1],[3],[4] |  |
Fair Value | 238,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_EquityinMortgageOriginatorMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
Investment Owned, Balance, Shares | 728 us-gaap_InvestmentOwnedBalanceShares / invest_InvestmentAxis = efc_EquityinMortgageOriginatorMember / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | [1],[3],[4] |  |
US Treasury Securities [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 0.21%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = us-gaap_USTreasurySecuritiesMember | [1],[2],[3],[4] |  |
Fair Value | 1,636,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = us-gaap_USTreasurySecuritiesMember | [1],[3],[4] |  |
Investment Owned, at Cost | 1,550,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = us-gaap_USTreasurySecuritiesMember | [1],[3],[4] |  |
US Treasury Securities [Member] | US Treasury Bond [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Current Principal/Notional Amount | 1,560,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentAxis = us-gaap_USTreasuryBondSecuritiesMember / us-gaap_InvestmentTypeAxis = us-gaap_USTreasurySecuritiesMember | [1],[3],[4] |  |
Investment Owned Description | U.S. Treasury Bond | [1],[3],[4] |  |
Rate | 3.00%invest_InvestmentInterestRate / invest_InvestmentAxis = us-gaap_USTreasuryBondSecuritiesMember / us-gaap_InvestmentTypeAxis = us-gaap_USTreasurySecuritiesMember | [1],[3],[4] |  |
Maturity | 2044-11 | [1],[3],[4] |  |
Fair Value | 1,636,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = us-gaap_USTreasuryBondSecuritiesMember / us-gaap_InvestmentTypeAxis = us-gaap_USTreasurySecuritiesMember | [1],[3],[4] |  |
Long Investments [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 275.46%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember | [1],[2],[3],[4] | 276.36%us-gaap_InvestmentOwnedPercentOfNetAssets / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember | [1],[2],[6],[7]
Current Principal/Notional Amount |  |  | 2,478,291,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Fair Value | 2,172,082,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember | [1],[3],[4] | 1,730,130,000 us-gaap_InvestmentOwnedAtFairValue / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember | [1],[6],[7]
Investment Owned, at Cost | 2,122,326,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember | [1],[3],[4] | 1,688,257,000 us-gaap_InvestmentOwnedAtCost / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember | [1],[6],[7]
Long Investments [Member] | North America [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 264.46%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 275.44%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Current Principal/Notional Amount | 2,863,057,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 2,470,650,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Fair Value | 2,092,959,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 1,724,370,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Investment Owned, at Cost | 2,038,249,000 us-gaap_InvestmentOwnedAtCost / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 1,682,533,000 us-gaap_InvestmentOwnedAtCost / invest_InvestmentGeographicRegionAxis = us-gaap_NorthAmericaMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Long Investments [Member] | Europe [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 9.16%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentGeographicRegionAxis = us-gaap_EuropeMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 0.92%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentGeographicRegionAxis = us-gaap_EuropeMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Current Principal/Notional Amount | 69,724,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentGeographicRegionAxis = us-gaap_EuropeMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 7,641,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / invest_InvestmentGeographicRegionAxis = us-gaap_EuropeMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Fair Value | 64,611,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentGeographicRegionAxis = us-gaap_EuropeMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 5,760,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentGeographicRegionAxis = us-gaap_EuropeMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Investment Owned, at Cost | 69,360,000 us-gaap_InvestmentOwnedAtCost / invest_InvestmentGeographicRegionAxis = us-gaap_EuropeMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 5,724,000 us-gaap_InvestmentOwnedAtCost / invest_InvestmentGeographicRegionAxis = us-gaap_EuropeMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Long Investments [Member] | Federal National Mortgage Association [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 100.30%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentAxis = efc_FederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 100.85%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentAxis = efc_FederalNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Long Investments [Member] | Federal Home Loan Mortgage Corporation [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 53.97%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentAxis = efc_FederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 51.37%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentAxis = efc_FederalHomeLoanMortgageCorporationMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Long Investments [Member] | Government National Mortgage Association [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Investment owned as a percentage of equity | 9.33%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentAxis = efc_GovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |  | 12.36%us-gaap_InvestmentOwnedPercentOfNetAssets / invest_InvestmentAxis = efc_GovernmentNationalMortgageAssociationMember / us-gaap_InvestmentTypeAxis = efc_LongInvestmentsMember |
Commercial Mortgage Loan With Extendable Maturity [Member] | Commercial Mortgage Loans [Member] | Various Issuer [Member] |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Fair Value |  |  | $ 5,000,000 us-gaap_InvestmentOwnedAtFairValue / invest_InvestmentAxis = efc_VariousIssuerMember / us-gaap_InvestmentTypeAxis = efc_CommercialMortgageLoansMember / us-gaap_StatementScenarioAxis = efc_CommercialmortgageloanwithextendablematurityMember |
[1] | See Note 2 and Note 3 in Notes to Consolidated Financial Statements.
[2] | Classification percentages are based on Total Equity.
[3] | The following table details the breakout by geographical region of long investments, investments sold short, repurchase agreements, financial derivatives–assets, and financial derivatives–liabilities.Region Current Principal/Notional Value/Number of Properties/Number of Shares Cost/(Proceeds) Fair Value Percent ofEquityLong Investments: (In thousands, Expressed in U.S. Dollars) North America 2,863,057 $2,038,249 $2,092,959 264.46 %Europe 69,724 69,360 64,611 9.16 %North America (Private Corporate Investments) n/a 14,717 14,512 1.84 %Total $2,122,326 $2,172,082 275.46 %Investments Sold Short: North America (TBAs and Government Debt) (1,159,703) $(1,230,478) $(1,234,248) (156.53)%Europe (Government Debt) (28,118) (32,008) (30,606) (3.88)%North America (Common Stock) (2,986) (27,605) (26,516) (3.36)%Total $(1,290,091) $(1,291,370) (163.77)%Repurchase Agreements: North America 140,248 $140,248 $140,248 17.78 %Europe 31,753 31,753 31,753 4.03 %Total 172,001 $172,001 $172,001 21.81 %Financial Derivatives–Assets: North America 1,401,261 $61,560 $80,029 10.15 %Europe — — — — %Total 1,401,261 $61,560 $80,029 10.15 %Financial Derivatives–Liabilities: North America (936,799) $(30,598) $(63,084) (8.00)%Europe (37,199) (2,957) (3,032) (0.39)%Total (973,998) $(33,555) $(66,116) (8.39)%
[4] | The table below shows the Company's long investment ratings from Moody's, Standard and Poor's, or Fitch, as well as the Company's long investments that were unrated but guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, or the Government National Mortgage Association. Ratings tend to be a lagging credit indicator; as a result, the credit quality of the Company's long investment holdings may be lower than the credit quality implied based on the ratings listed below. In situations where an investment has a split rating, the lowest provided rating is used. The ratings descriptions include ratings qualified with a "+," "-," "1," "2," or "3."Rating Description Percent of EquityUnrated but Agency-Guaranteed 163.60%A/A/A 0.98%Baa/BBB/BBB 5.62%Ba/BB/BB or below 80.65%Unrated 24.61%
[5] | At December 31, 2014, the Company's long investments guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, and the Government National Mortgage Association, represented 100.30%, 53.97%, and 9.33% of equity, respectively.
[6] | The table below shows the ratings on the Company's long investments from Moody's, Standard and Poor's, or Fitch, as well as the Company's long investments that were unrated but guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, or the Government National Mortgage Association. Ratings tend to be a lagging credit indicator; as a result, the credit quality of the Company's long investment holdings may be lower than the credit quality implied based on the ratings listed below. In situations where an investment has a split rating, the lowest provided rating is used. The ratings descriptions include ratings qualified with a "+," "-," "1," "2," or "3."Rating Description Percent ofEquityUnrated but Agency-Guaranteed 164.58%A/A/A 0.34%Baa/BBB/BBB 2.97%Ba/BB/BB or below 97.95%Unrated 10.52%
[7] | The following table details the breakout by geographical region of long investments, investments sold short, and repurchase agreements. All financial derivatives were concentrated in North America.Region Current Principal/Notional Value/Number of Shares Cost/(Proceeds) Fair Value Percent ofEquityLong Investments: (In thousands, Expressed in U.S. Dollars) North America 2,470,650 $1,682,533 $1,724,370 275.44 %Europe 7,641 5,724 5,760 0.92 %Total 2,478,291 $1,688,257 $1,730,130 276.36 %Investments Sold Short: North America (TBAs and Government Debt) (804,888) $(833,656) $(831,564) (132.82)%Europe (Government Debt) (7,337) (7,633) (7,681) (1.23)%North America (Common Stock) (763) (6,313) (6,369) (1.02)%Total $(847,602) $(845,614) (135.07)%Repurchase Agreements: North America 19,675 $19,675 $19,675 3.15 %Europe 8,287 8,268 8,287 1.32 %Total 27,962 $27,943 $27,962 4.47 %
[8] | At December 31, 2013, the Company's long investments guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, and the Government National Mortgage Association, represented 100.85%, 51.37%, and 12.36% of equity, respectively.
[9] | Private trust 100% backed by interest in Government National Mortgage Association collateralized mortgage obligation certificates.
[10] | Includes non-performing commercial loans in the amount of $11.3 million whereby principal and/or interest is past due and a maturity date is not applicable.
[11] | Includes a loan with a fair value in the amount of $5.0 million where the maturity date may be extended through November 4, 2015 as well as non-performing commercial mortgage loans.
[12] | Number of properties not shown in thousands, represents actual number of properties owned.

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