3.3.1.900 html 385 250 1 true 76 0 false 5 false false R1.htm 0001000 - Document - Document and Entity Information Document Sheet http://www.earnreit.com/role/DocumentAndEntityInformationDocument Document and Entity Information Document Cover 1 false false R2.htm 1001000 - Statement - CONSOLIDATED BALANCE SHEET Sheet http://www.earnreit.com/role/ConsolidatedBalanceSheet CONSOLIDATED BALANCE SHEET Statements 2 false false R3.htm 1001001 - Statement - CONSOLIDATED BALANCE SHEET (Parenthetical) Sheet http://www.earnreit.com/role/ConsolidatedBalanceSheetParenthetical CONSOLIDATED BALANCE SHEET (Parenthetical) Statements 3 false false R4.htm 1002000 - Statement - CONSOLIDATED STATEMENT OF OPERATIONS Sheet http://www.earnreit.com/role/ConsolidatedStatementOfOperations CONSOLIDATED STATEMENT OF OPERATIONS Statements 4 false false R5.htm 1003000 - Statement - CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY Sheet http://www.earnreit.com/role/ConsolidatedStatementOfShareholdersEquity CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY Statements 5 false false R6.htm 1004000 - Statement - CONSOLIDATED STATEMENT OF CASH FLOWS Sheet http://www.earnreit.com/role/ConsolidatedStatementOfCashFlows CONSOLIDATED STATEMENT OF CASH FLOWS Statements 6 false false R7.htm 2101100 - Disclosure - Organization and Investment Objective Sheet http://www.earnreit.com/role/OrganizationAndInvestmentObjective Organization and Investment Objective Notes 7 false false R8.htm 2104100 - Disclosure - Significant Accounting Policies Sheet http://www.earnreit.com/role/SignificantAccountingPolicies Significant Accounting Policies Notes 8 false false R9.htm 2107100 - Disclosure - Mortgage-Backed Securities Sheet http://www.earnreit.com/role/MortgageBackedSecurities Mortgage-Backed Securities Notes 9 false false R10.htm 2110100 - Disclosure - Valuation Sheet http://www.earnreit.com/role/Valuation Valuation Notes 10 false false R11.htm 2113100 - Disclosure - Derivative Instruments Sheet http://www.earnreit.com/role/DerivativeInstruments Derivative Instruments Notes 11 false false R12.htm 2116100 - Disclosure - Borrowings under Repurchase Agreements Sheet http://www.earnreit.com/role/BorrowingsUnderRepurchaseAgreements Borrowings under Repurchase Agreements Notes 12 false false R13.htm 2119100 - Disclosure - Offsetting of Assets and Liabilities Sheet http://www.earnreit.com/role/OffsettingOfAssetsAndLiabilities Offsetting of Assets and Liabilities Notes 13 false false R14.htm 2125100 - Disclosure - Earnings per Share Sheet http://www.earnreit.com/role/EarningsPerShare Earnings per Share Notes 14 false false R15.htm 2131100 - Disclosure - Related Party Transactions Sheet http://www.earnreit.com/role/RelatedPartyTransactions Related Party Transactions Notes 15 false false R16.htm 2132100 - Disclosure - Capital Sheet http://www.earnreit.com/role/Capital Capital Notes 16 false false R17.htm 2133100 - Disclosure - Commitments and Contingencies Sheet http://www.earnreit.com/role/CommitmentsAndContingencies Commitments and Contingencies Notes 17 false false R18.htm 2134100 - Disclosure - Condensed Quarterly Financial Data (unaudited) (Notes) Notes http://www.earnreit.com/role/CondensedQuarterlyFinancialDataUnauditedNotes Condensed Quarterly Financial Data (unaudited) (Notes) Notes 18 false false R19.htm 2135100 - Disclosure - Subsequent Event (Notes) Notes http://www.earnreit.com/role/SubsequentEventNotes Subsequent Event (Notes) Notes 19 false false R20.htm 2204201 - Disclosure - Significant Accounting Policies Significant Accounting Policies (Policies) Sheet http://www.earnreit.com/role/SignificantAccountingPoliciesSignificantAccountingPoliciesPolicies Significant Accounting Policies Significant Accounting Policies (Policies) Policies http://www.earnreit.com/role/SignificantAccountingPolicies 20 false false R21.htm 2307301 - Disclosure - Mortgage-Backed Securities (Tables) Sheet http://www.earnreit.com/role/MortgageBackedSecuritiesTables Mortgage-Backed Securities (Tables) Tables http://www.earnreit.com/role/MortgageBackedSecurities 21 false false R22.htm 2310301 - Disclosure - Valuation (Tables) Sheet http://www.earnreit.com/role/ValuationTables Valuation (Tables) Tables http://www.earnreit.com/role/Valuation 22 false false R23.htm 2313301 - Disclosure - Derivative Instruments (Tables) Sheet http://www.earnreit.com/role/DerivativeInstrumentsTables Derivative Instruments (Tables) Tables http://www.earnreit.com/role/DerivativeInstruments 23 false false R24.htm 2316301 - Disclosure - Borrowings under Repurchase Agreements (Tables) Sheet http://www.earnreit.com/role/BorrowingsUnderRepurchaseAgreementsTables Borrowings under Repurchase Agreements (Tables) Tables http://www.earnreit.com/role/BorrowingsUnderRepurchaseAgreements 24 false false R25.htm 2319301 - Disclosure - Offsetting of Assets and Liabilities (Tables) Sheet http://www.earnreit.com/role/OffsettingOfAssetsAndLiabilitiesTables Offsetting of Assets and Liabilities (Tables) Tables http://www.earnreit.com/role/OffsettingOfAssetsAndLiabilities 25 false false R26.htm 2325301 - Disclosure - Earnings per Share (Tables) Sheet http://www.earnreit.com/role/EarningsPerShareTables Earnings per Share (Tables) Tables http://www.earnreit.com/role/EarningsPerShare 26 false false R27.htm 2332301 - Disclosure - Capital Capital (Tables) Sheet http://www.earnreit.com/role/CapitalCapitalTables Capital Capital (Tables) Tables 27 false false R28.htm 2334301 - Disclosure - Condensed Quarterly Financial Data (unaudited) (Tables) Sheet http://www.earnreit.com/role/CondensedQuarterlyFinancialDataUnauditedTables Condensed Quarterly Financial Data (unaudited) (Tables) Tables http://www.earnreit.com/role/CondensedQuarterlyFinancialDataUnauditedNotes 28 false false R29.htm 2401401 - Disclosure - Organization and Investment Objective (Details) Sheet http://www.earnreit.com/role/OrganizationAndInvestmentObjectiveDetails Organization and Investment Objective (Details) Details http://www.earnreit.com/role/OrganizationAndInvestmentObjective 29 false false R30.htm 2404402 - Disclosure - Significant Accounting Policies (Details) Sheet http://www.earnreit.com/role/SignificantAccountingPoliciesDetails Significant Accounting Policies (Details) Details http://www.earnreit.com/role/SignificantAccountingPoliciesSignificantAccountingPoliciesPolicies 30 false false R31.htm 2407402 - Disclosure - Schedule of Mortgage-Backed Securities (Details) Sheet http://www.earnreit.com/role/ScheduleOfMortgageBackedSecuritiesDetails Schedule of Mortgage-Backed Securities (Details) Details 31 false false R32.htm 2407403 - Disclosure - Schedule of Mortgage-Backed Securities by Weighted Average Life (Details) Sheet http://www.earnreit.com/role/ScheduleOfMortgageBackedSecuritiesByWeightedAverageLifeDetails Schedule of Mortgage-Backed Securities by Weighted Average Life (Details) Details 32 false false R33.htm 2407404 - Disclosure - Mortgage-Backed Securities Interest Income Components (Details) Sheet http://www.earnreit.com/role/MortgageBackedSecuritiesInterestIncomeComponentsDetails Mortgage-Backed Securities Interest Income Components (Details) Details 33 false false R34.htm 2407405 - Disclosure - Mortgage-Backed Securities Narrative (Details) Sheet http://www.earnreit.com/role/MortgageBackedSecuritiesNarrativeDetails Mortgage-Backed Securities Narrative (Details) Details 34 false false R35.htm 2410402 - Disclosure - Valuation Schedule of Fair Value Measurements (Details) Sheet http://www.earnreit.com/role/ValuationScheduleOfFairValueMeasurementsDetails Valuation Schedule of Fair Value Measurements (Details) Details 35 false false R36.htm 2410403 - Disclosure - Valuation Unobservable Input Reconciliation (Details) Sheet http://www.earnreit.com/role/ValuationUnobservableInputReconciliationDetails Valuation Unobservable Input Reconciliation (Details) Details 36 false false R37.htm 2410404 - Disclosure - Valuation Qualtitative Information (Details) Sheet http://www.earnreit.com/role/ValuationQualtitativeInformationDetails Valuation Qualtitative Information (Details) Details 37 false false R38.htm 2410405 - Disclosure - Valuation Fair Value, Other Financial Instruments (Details) Sheet http://www.earnreit.com/role/ValuationFairValueOtherFinancialInstrumentsDetails Valuation Fair Value, Other Financial Instruments (Details) Details 38 false false R39.htm 2413402 - Disclosure - Derivative Instruments Schedule of Derivatves (Details) Sheet http://www.earnreit.com/role/DerivativeInstrumentsScheduleOfDerivatvesDetails Derivative Instruments Schedule of Derivatves (Details) Details 39 false false R40.htm 2413403 - Disclosure - Derivative Instruments Schedule of Interest Rate Swaps by Maturity (Details) Sheet http://www.earnreit.com/role/DerivativeInstrumentsScheduleOfInterestRateSwapsByMaturityDetails Derivative Instruments Schedule of Interest Rate Swaps by Maturity (Details) Details 40 false false R41.htm 2413404 - Disclosure - Derivative Instruments Schedule of Swaptions (Details) Sheet http://www.earnreit.com/role/DerivativeInstrumentsScheduleOfSwaptionsDetails Derivative Instruments Schedule of Swaptions (Details) Details 41 false false R42.htm 2413405 - Disclosure - Derivative Instruments Schedule of Futures (Details) Sheet http://www.earnreit.com/role/DerivativeInstrumentsScheduleOfFuturesDetails Derivative Instruments Schedule of Futures (Details) Details 42 false false R43.htm 2413406 - Disclosure - Derivative Instruments Schedule of TBA Securities (Details) Sheet http://www.earnreit.com/role/DerivativeInstrumentsScheduleOfTbaSecuritiesDetails Derivative Instruments Schedule of TBA Securities (Details) Details 43 false false R44.htm 2413407 - Disclosure - Schedule of Derivative Activity (Details) Sheet http://www.earnreit.com/role/ScheduleOfDerivativeActivityDetails Schedule of Derivative Activity (Details) Details 44 false false R45.htm 2413408 - Disclosure - Derivative Instruments Schedule of Gains and Losses on Derivative Instruments (Details) Sheet http://www.earnreit.com/role/DerivativeInstrumentsScheduleOfGainsAndLossesOnDerivativeInstrumentsDetails Derivative Instruments Schedule of Gains and Losses on Derivative Instruments (Details) Details 45 false false R46.htm 2413409 - Disclosure - Financial Derivatives Narrative (Details) Sheet http://www.earnreit.com/role/FinancialDerivativesNarrativeDetails Financial Derivatives Narrative (Details) Details 46 false false R47.htm 2416402 - Disclosure - Borrowings under Repurchase Agreements Schedule of Repurchase Agreements by Maturity (Details) Sheet http://www.earnreit.com/role/BorrowingsUnderRepurchaseAgreementsScheduleOfRepurchaseAgreementsByMaturityDetails Borrowings under Repurchase Agreements Schedule of Repurchase Agreements by Maturity (Details) Details 47 false false R48.htm 2416403 - Disclosure - Borrowings under Repurchase Agreements (Details) Sheet http://www.earnreit.com/role/BorrowingsUnderRepurchaseAgreementsDetails Borrowings under Repurchase Agreements (Details) Details http://www.earnreit.com/role/BorrowingsUnderRepurchaseAgreementsTables 48 false false R49.htm 2419402 - Disclosure - Offsetting of Assets and Liabilities (Details) Sheet http://www.earnreit.com/role/OffsettingOfAssetsAndLiabilitiesDetails Offsetting of Assets and Liabilities (Details) Details http://www.earnreit.com/role/OffsettingOfAssetsAndLiabilitiesTables 49 false false R50.htm 2425402 - Disclosure - Earnings per Share (Details) Sheet http://www.earnreit.com/role/EarningsPerShareDetails Earnings per Share (Details) Details http://www.earnreit.com/role/EarningsPerShareTables 50 false false R51.htm 2431401 - Disclosure - Related Party Transactions (Details) Sheet http://www.earnreit.com/role/RelatedPartyTransactionsDetails Related Party Transactions (Details) Details http://www.earnreit.com/role/RelatedPartyTransactions 51 false false R52.htm 2432402 - Disclosure - Capital Summary of Common Shares Outstanding (Details) Sheet http://www.earnreit.com/role/CapitalSummaryOfCommonSharesOutstandingDetails Capital Summary of Common Shares Outstanding (Details) Details 52 false false R53.htm 2432403 - Disclosure - Capital Vesting Schedule for restricted shares (Details) Sheet http://www.earnreit.com/role/CapitalVestingScheduleForRestrictedSharesDetails Capital Vesting Schedule for restricted shares (Details) Details 53 false false R54.htm 2432404 - Disclosure - Capital (Details) Sheet http://www.earnreit.com/role/CapitalDetails Capital (Details) Details http://www.earnreit.com/role/CapitalCapitalTables 54 false false R55.htm 2434402 - Disclosure - Condensed Quarterly Financial Data (unaudited) (Details) Sheet http://www.earnreit.com/role/CondensedQuarterlyFinancialDataUnauditedDetails Condensed Quarterly Financial Data (unaudited) (Details) Details http://www.earnreit.com/role/CondensedQuarterlyFinancialDataUnauditedTables 55 false false R56.htm 2435402 - Disclosure - Subsequent Event (Details) Sheet http://www.earnreit.com/role/SubsequentEventDetails Subsequent Event (Details) Details http://www.earnreit.com/role/SubsequentEventNotes 56 false false All Reports Book All Reports earn-20151231.xml earn-20151231.xsd earn-20151231_cal.xml earn-20151231_def.xml earn-20151231_lab.xml earn-20151231_pre.xml true true