MITT AG Mortgage Investment Trust Inc

FALSE2020Q30001514281--12-315.735.735.732.579.864.198.567.3246.0736.9121.6823.1566.6766.6700015142812020-01-012020-09-300001514281us-gaap:CommonStockMember2020-01-012020-09-300001514281mitt:SeriesACumulativeReedmablePreferredStockMember2020-01-012020-09-300001514281mitt:SeriesBCumulativeReedmablePreferredStockMember2020-01-012020-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2020-01-012020-09-30xbrli:shares00015142812020-11-04iso4217:USD0001514281us-gaap:USGovernmentAgenciesDebtSecuritiesMember2020-09-300001514281us-gaap:USGovernmentAgenciesDebtSecuritiesMember2019-12-310001514281us-gaap:CorporateDebtSecuritiesMember2020-09-300001514281us-gaap:CorporateDebtSecuritiesMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMember2020-09-300001514281us-gaap:CommercialMortgageBackedSecuritiesMember2019-12-310001514281us-gaap:ResidentialMortgageMember2020-09-300001514281us-gaap:ResidentialMortgageMember2019-12-3100015142812020-09-3000015142812019-12-310001514281us-gaap:CommercialLoanMember2020-09-300001514281us-gaap:CommercialLoanMember2019-12-31iso4217:USDxbrli:sharesxbrli:pure0001514281mitt:SeriesACumulativeReedmablePreferredStockMember2020-09-300001514281mitt:SeriesACumulativeReedmablePreferredStockMember2019-12-310001514281mitt:SeriesBCumulativeReedmablePreferredStockMember2020-09-300001514281mitt:SeriesBCumulativeReedmablePreferredStockMember2019-12-310001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2020-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2019-12-3100015142812020-07-012020-09-3000015142812019-07-012019-09-3000015142812019-01-012019-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2019-01-012019-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2019-07-012019-09-300001514281us-gaap:CommonStockMember2020-06-300001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2020-06-300001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2020-06-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2020-06-300001514281us-gaap:AdditionalPaidInCapitalMember2020-06-300001514281us-gaap:RetainedEarningsMember2020-06-3000015142812020-06-300001514281us-gaap:CommonStockMember2020-07-012020-09-300001514281us-gaap:AdditionalPaidInCapitalMember2020-07-012020-09-300001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2020-07-012020-09-300001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2020-07-012020-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2020-07-012020-09-300001514281us-gaap:RetainedEarningsMember2020-07-012020-09-300001514281us-gaap:CommonStockMember2020-09-300001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2020-09-300001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2020-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2020-09-300001514281us-gaap:AdditionalPaidInCapitalMember2020-09-300001514281us-gaap:RetainedEarningsMember2020-09-300001514281us-gaap:CommonStockMember2019-06-300001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2019-06-300001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2019-06-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2019-06-300001514281us-gaap:AdditionalPaidInCapitalMember2019-06-300001514281us-gaap:RetainedEarningsMember2019-06-3000015142812019-06-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2019-07-012019-09-300001514281us-gaap:PreferredStockMember2019-07-012019-09-300001514281us-gaap:CommonStockMember2019-07-012019-09-300001514281us-gaap:AdditionalPaidInCapitalMember2019-07-012019-09-300001514281us-gaap:RetainedEarningsMember2019-07-012019-09-300001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:RetainedEarningsMember2019-07-012019-09-300001514281mitt:SeriesCumulativeReedmablePreferredMember2019-07-012019-09-300001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:RetainedEarningsMember2019-07-012019-09-300001514281mitt:SeriesBCumulativeReedmablePreferredMember2019-07-012019-09-300001514281us-gaap:CommonStockMember2019-09-300001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2019-09-300001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2019-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2019-09-300001514281us-gaap:AdditionalPaidInCapitalMember2019-09-300001514281us-gaap:RetainedEarningsMember2019-09-3000015142812019-09-300001514281us-gaap:CommonStockMember2019-12-310001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2019-12-310001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2019-12-310001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2019-12-310001514281us-gaap:AdditionalPaidInCapitalMember2019-12-310001514281us-gaap:RetainedEarningsMember2019-12-310001514281us-gaap:CommonStockMember2020-01-012020-09-300001514281us-gaap:AdditionalPaidInCapitalMember2020-01-012020-09-300001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:RetainedEarningsMember2020-01-012020-09-300001514281mitt:SeriesCumulativeReedmablePreferredMember2020-01-012020-09-300001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:RetainedEarningsMember2020-01-012020-09-300001514281mitt:SeriesBCumulativeReedmablePreferredMember2020-01-012020-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:RetainedEarningsMember2020-01-012020-09-300001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2020-01-012020-09-300001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2020-01-012020-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2020-01-012020-09-300001514281us-gaap:RetainedEarningsMember2020-01-012020-09-300001514281us-gaap:CommonStockMember2018-12-310001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2018-12-310001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:PreferredStockMember2018-12-310001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2018-12-310001514281us-gaap:AdditionalPaidInCapitalMember2018-12-310001514281us-gaap:RetainedEarningsMember2018-12-3100015142812018-12-310001514281us-gaap:CommonStockMember2019-01-012019-09-300001514281us-gaap:AdditionalPaidInCapitalMember2019-01-012019-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2019-01-012019-09-300001514281us-gaap:RetainedEarningsMember2019-01-012019-09-300001514281mitt:SeriesCumulativeReedmablePreferredMemberus-gaap:RetainedEarningsMember2019-01-012019-09-300001514281mitt:SeriesCumulativeReedmablePreferredMember2019-01-012019-09-300001514281mitt:SeriesBCumulativeReedmablePreferredMemberus-gaap:RetainedEarningsMember2019-01-012019-09-300001514281mitt:SeriesBCumulativeReedmablePreferredMember2019-01-012019-09-300001514281mitt:AgencyResidentialMortgageBackedSecuritiesMember2020-07-012020-09-300001514281us-gaap:ResidentialPortfolioSegmentMember2020-07-012020-09-300001514281mitt:SettledSecuritiesMember2020-07-012020-09-300001514281us-gaap:CommercialPortfolioSegmentMember2020-07-012020-09-300001514281mitt:NonQualifiedMortgageLoansMember2020-09-300001514281mitt:SeniorTranchesMember2020-09-300001514281mitt:BaseManagementFeeQuarterOneAndQuarterTwoTwentyTwentyMemberus-gaap:CommonStockMember2020-09-242020-09-240001514281mitt:BaseManagementFeeQuarterOneAndQuarterTwoTwentyTwentyMember2020-09-240001514281mitt:BaseManagementFeeQuarterThreeTwentyTwentyMemberus-gaap:CommonStockMember2020-09-242020-09-240001514281mitt:BaseManagementFeeQuarterThreeTwentyTwentyMember2020-09-2400015142812020-08-3100015142812020-04-030001514281us-gaap:AssetsMember2020-09-300001514281mitt:LiabilitiesMember2020-09-300001514281mitt:StockholdersEquityMember2020-09-300001514281us-gaap:AssetsMember2019-12-310001514281mitt:LiabilitiesMember2019-12-310001514281mitt:StockholdersEquityMember2019-12-310001514281mitt:ArcHomeLlcMemberus-gaap:AssetsMember2020-09-300001514281mitt:ArcHomeLlcMembermitt:LiabilitiesMember2020-09-300001514281mitt:ArcHomeLlcMembermitt:StockholdersEquityMember2020-09-300001514281mitt:ArcHomeLlcMemberus-gaap:AssetsMember2019-12-310001514281mitt:ArcHomeLlcMembermitt:LiabilitiesMember2019-12-310001514281mitt:ArcHomeLlcMembermitt:StockholdersEquityMember2019-12-310001514281mitt:ResidentialAndCommercialRealEstatesAssetsMembermitt:MortgageAcquisitionTrustMember2020-09-300001514281mitt:ResidentialAndCommercialRealEstatesAssetsMembermitt:MortgageAcquisitionTrustMember2019-12-310001514281mitt:ResidentialAndCommercialRealEstatesAssetsMember2020-01-012020-09-300001514281mitt:ResidentialAndCommercialRealEstatesAssetsMember2019-01-012019-12-310001514281mitt:ResidentialAndCommercialRealEstatesAssetsMember2020-09-300001514281mitt:LotLoansMembermitt:ResidentialAndCommercialRealEstatesAssetsMember2020-09-300001514281mitt:LotLoansMembermitt:ResidentialAndCommercialRealEstatesAssetsMember2019-12-310001514281mitt:VariableInterestEntityDecember2014Member2020-01-012020-09-300001514281mitt:VariableInterestEntityAugust2018Member2020-01-012020-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2019-09-170001514281us-gaap:LondonInterbankOfferedRateLIBORMembermitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2019-09-172019-09-170001514281mitt:AgencyResidentialMortgageBackedSecuritiesThirtyYearsFixedRateMember2020-09-300001514281us-gaap:ResidentialPortfolioSegmentMembermitt:NonAgencyResidentialMortgageBackedSecuritiesPrimeMember2020-09-300001514281us-gaap:ResidentialPortfolioSegmentMembermitt:NonAgencyResidentialMortgageBackedSecuritiesAltASubprimeMember2020-09-300001514281us-gaap:ResidentialPortfolioSegmentMembermitt:NonAgencyResidentialMortgageBackedSecuritiesCreditRiskTransferMember2020-09-300001514281mitt:NonAgencyResidentialMortgageBackedSecuritiesNonUSResidentialMortgageBackedSecuritiesMemberus-gaap:ResidentialPortfolioSegmentMember2020-09-300001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:ResidentialPortfolioSegmentMember2020-09-300001514281mitt:NonAgencyResidentialMortgageBackedSecuritiesReNonPerformingSecuritiesMemberus-gaap:ResidentialPortfolioSegmentMember2020-09-300001514281us-gaap:ResidentialPortfolioSegmentMembermitt:NonAgencyResidentialMortgageBackedSecuritiesLandRelatedFinancingMember2020-09-300001514281us-gaap:ResidentialPortfolioSegmentMember2020-09-300001514281mitt:CommercialMortgageBackedSecuritiesConduitMemberus-gaap:CommercialPortfolioSegmentMember2020-09-300001514281mitt:CommercialMortgageBackedSecuritiesSingleAssetSingleBorrowerMemberus-gaap:CommercialPortfolioSegmentMember2020-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMemberus-gaap:CommercialPortfolioSegmentMember2020-09-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:CommercialPortfolioSegmentMember2020-09-300001514281us-gaap:CommercialPortfolioSegmentMember2020-09-300001514281mitt:TotalCreditInvestmentsMember2020-09-300001514281mitt:AgencyResidentialMortgageBackedSecuritiesThirtyYearsFixedRateMember2019-12-310001514281mitt:AgencyResidentialMortgageBackedSecuritiesInterestOnlyMember2019-12-310001514281mitt:AgencyResidentialMortgageBackedSecuritiesMember2019-12-310001514281us-gaap:ResidentialPortfolioSegmentMembermitt:NonAgencyResidentialMortgageBackedSecuritiesPrimeMember2019-12-310001514281us-gaap:ResidentialPortfolioSegmentMembermitt:NonAgencyResidentialMortgageBackedSecuritiesAltASubprimeMember2019-12-310001514281us-gaap:ResidentialPortfolioSegmentMembermitt:NonAgencyResidentialMortgageBackedSecuritiesCreditRiskTransferMember2019-12-310001514281mitt:NonAgencyResidentialMortgageBackedSecuritiesNonUSResidentialMortgageBackedSecuritiesMemberus-gaap:ResidentialPortfolioSegmentMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:ResidentialPortfolioSegmentMember2019-12-310001514281mitt:NonAgencyResidentialMortgageBackedSecuritiesReNonPerformingSecuritiesMemberus-gaap:ResidentialPortfolioSegmentMember2019-12-310001514281us-gaap:ResidentialPortfolioSegmentMembermitt:NonAgencyResidentialMortgageBackedSecuritiesLandRelatedFinancingMember2019-12-310001514281us-gaap:ResidentialPortfolioSegmentMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesConduitMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesSingleAssetSingleBorrowerMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001514281us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001514281us-gaap:CommercialPortfolioSegmentMember2019-12-310001514281mitt:TotalCreditInvestmentsMember2019-12-310001514281mitt:SettledSecuritiesMember2019-07-012019-09-300001514281mitt:FairValuesOfSecuritiesMember2019-07-012019-09-300001514281mitt:SettledSecuritiesMember2019-01-012019-09-300001514281mitt:FairValuesOfSecuritiesMember2019-01-012019-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2020-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2019-12-310001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-12-31mitt:security0001514281mitt:SettledSecuritiesMember2020-01-012020-09-300001514281mitt:UnsettledSecuritiesMember2019-07-012019-09-300001514281mitt:UnsettledSecuritiesMember2019-01-012019-09-300001514281us-gaap:CorporateDebtSecuritiesMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-12-310001514281us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-12-310001514281mitt:ResecuritizedAssetMembermitt:ConsolidatedTrancheMember2019-12-310001514281mitt:ResecuritizedAssetMembermitt:ConsolidatedTrancheMember2019-01-012019-12-310001514281mitt:ResecuritizedAssetMembermitt:RetainedTrancheMember2019-12-310001514281mitt:ResecuritizedAssetMembermitt:RetainedTrancheMember2019-01-012019-12-310001514281mitt:ResecuritizedAssetMember2019-12-310001514281mitt:ResecuritizedAssetMember2019-01-012019-12-310001514281us-gaap:ResidentialPortfolioSegmentMember2020-01-310001514281us-gaap:ResidentialPortfolioSegmentMember2020-09-01mitt:loan0001514281us-gaap:ResidentialPortfolioSegmentMember2020-01-012020-09-300001514281us-gaap:ResidentialPortfolioSegmentMember2019-01-012019-09-300001514281us-gaap:ResidentialPortfolioSegmentMember2019-01-012019-12-310001514281us-gaap:PerformingFinancingReceivableMemberus-gaap:ResidentialPortfolioSegmentMember2020-09-300001514281us-gaap:PerformingFinancingReceivableMemberus-gaap:ResidentialPortfolioSegmentMember2019-12-310001514281us-gaap:NonperformingFinancingReceivableMemberus-gaap:ResidentialPortfolioSegmentMember2020-09-300001514281us-gaap:NonperformingFinancingReceivableMemberus-gaap:ResidentialPortfolioSegmentMember2019-12-310001514281mitt:OtherMemberus-gaap:ResidentialPortfolioSegmentMember2020-09-300001514281mitt:OtherMemberus-gaap:ResidentialPortfolioSegmentMember2019-12-310001514281mitt:LoansPoolsMember2019-01-012019-09-300001514281mitt:LoansPoolsMember2019-07-012019-09-300001514281us-gaap:NonperformingFinancingReceivableMember2019-09-300001514281us-gaap:NonperformingFinancingReceivableMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2019-09-300001514281us-gaap:NonperformingFinancingReceivableMember2019-01-012019-09-300001514281us-gaap:AccountsReceivableMemberstpr:CAus-gaap:ResidentialPortfolioSegmentMemberus-gaap:GeographicConcentrationRiskMember2020-01-012020-09-300001514281us-gaap:AccountsReceivableMemberstpr:CAus-gaap:ResidentialPortfolioSegmentMemberus-gaap:GeographicConcentrationRiskMember2019-01-012019-12-310001514281us-gaap:AccountsReceivableMemberus-gaap:ResidentialPortfolioSegmentMemberus-gaap:GeographicConcentrationRiskMemberstpr:FL2020-01-012020-09-300001514281us-gaap:AccountsReceivableMemberus-gaap:ResidentialPortfolioSegmentMemberus-gaap:GeographicConcentrationRiskMemberstpr:FL2019-01-012019-12-310001514281us-gaap:AccountsReceivableMemberus-gaap:ResidentialPortfolioSegmentMemberus-gaap:GeographicConcentrationRiskMemberstpr:NY2020-01-012020-09-300001514281us-gaap:AccountsReceivableMemberus-gaap:ResidentialPortfolioSegmentMemberus-gaap:GeographicConcentrationRiskMemberstpr:NY2019-01-012019-12-310001514281us-gaap:AccountsReceivableMemberus-gaap:ResidentialPortfolioSegmentMemberus-gaap:GeographicConcentrationRiskMemberstpr:NJ2020-01-012020-09-300001514281us-gaap:AccountsReceivableMemberus-gaap:ResidentialPortfolioSegmentMemberus-gaap:GeographicConcentrationRiskMemberstpr:NJ2019-01-012019-12-310001514281us-gaap:ResidentialPortfolioSegmentMember2020-06-300001514281us-gaap:ResidentialPortfolioSegmentMember2019-06-300001514281us-gaap:ResidentialPortfolioSegmentMember2018-12-310001514281us-gaap:ResidentialPortfolioSegmentMember2019-07-012019-09-300001514281us-gaap:ResidentialPortfolioSegmentMember2019-09-300001514281srt:MinimumMemberus-gaap:ResidentialPortfolioSegmentMember2020-09-300001514281us-gaap:ResidentialPortfolioSegmentMembersrt:MaximumMember2020-09-300001514281srt:MinimumMemberus-gaap:ResidentialPortfolioSegmentMember2019-12-310001514281us-gaap:ResidentialPortfolioSegmentMembersrt:MaximumMember2019-12-310001514281mitt:VariableInterestEntityAugust2019AndSeptember2020Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2020-09-300001514281mitt:VariableInterestEntityAugust2019AndSeptember2020Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-12-310001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ResidentialPortfolioSegmentMember2020-09-300001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ResidentialPortfolioSegmentMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-09-300001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ResidentialPortfolioSegmentMember2020-01-012020-09-300001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2020-09-300001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-09-300001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2020-01-012020-09-300001514281us-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ResidentialPortfolioSegmentMembermitt:VariableInterestEntitySeptember2020Member2020-09-300001514281us-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ResidentialPortfolioSegmentMemberus-gaap:EstimateOfFairValueFairValueDisclosureMembermitt:VariableInterestEntitySeptember2020Member2020-09-300001514281us-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ResidentialPortfolioSegmentMembermitt:VariableInterestEntitySeptember2020Member2020-01-012020-09-300001514281us-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMembermitt:VariableInterestEntitySeptember2020Member2020-09-300001514281us-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:EstimateOfFairValueFairValueDisclosureMembermitt:VariableInterestEntitySeptember2020Member2020-09-300001514281us-gaap:VariableInterestEntityPrimaryBeneficiaryMembermitt:VariableInterestEntitySeptember2020Member2020-01-012020-09-300001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ResidentialPortfolioSegmentMember2019-12-310001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ResidentialPortfolioSegmentMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2019-12-310001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ResidentialPortfolioSegmentMember2019-01-012019-12-310001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-12-310001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2019-12-310001514281mitt:VariableInterestEntityAugust2019Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-01-012019-12-310001514281mitt:VariableInterestEntityAugust2019AndSeptember2020Memberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-09-300001514281us-gaap:CommercialPortfolioSegmentMember2020-01-012020-09-300001514281mitt:LoanGMemberus-gaap:CommercialPortfolioSegmentMember2020-09-300001514281mitt:LoanGMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-09-300001514281us-gaap:CommercialPortfolioSegmentMembermitt:LoanIMember2020-09-300001514281us-gaap:CommercialPortfolioSegmentMembermitt:LoanIMember2020-01-012020-09-300001514281mitt:LoanKMemberus-gaap:CommercialPortfolioSegmentMember2020-09-300001514281mitt:LoanKMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-09-300001514281mitt:LoanLMemberus-gaap:CommercialPortfolioSegmentMember2020-09-300001514281mitt:LoanLMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-09-300001514281us-gaap:CommercialLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-09-300001514281us-gaap:CommercialLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-09-300001514281us-gaap:SubsequentEventMemberus-gaap:CommercialPortfolioSegmentMembermitt:LoanIMember2020-11-060001514281mitt:LoanGMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001514281mitt:LoanGMemberus-gaap:CommercialPortfolioSegmentMember2019-01-012019-12-310001514281mitt:LoanHMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001514281mitt:LoanHMemberus-gaap:CommercialPortfolioSegmentMember2019-01-012019-12-310001514281us-gaap:CommercialPortfolioSegmentMembermitt:LoanIMember2019-12-310001514281us-gaap:CommercialPortfolioSegmentMembermitt:LoanIMember2019-01-012019-12-310001514281mitt:LoanJMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001514281mitt:LoanJMemberus-gaap:CommercialPortfolioSegmentMember2019-01-012019-12-310001514281mitt:LoanKMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001514281mitt:LoanKMemberus-gaap:CommercialPortfolioSegmentMember2019-01-012019-12-310001514281mitt:LoanLMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001514281mitt:LoanLMemberus-gaap:CommercialPortfolioSegmentMember2019-01-012019-12-310001514281us-gaap:CommercialLoanMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001514281us-gaap:CommercialLoanMemberus-gaap:CommercialPortfolioSegmentMember2019-01-012019-12-310001514281mitt:AgencyExcessMsrsMember2020-08-312020-08-310001514281mitt:AgencyExcessMsrsMember2020-08-310001514281mitt:AgencyExcessMsrsMembermitt:AGMortgageInvestmentTrustIncMember2020-08-312020-08-310001514281mitt:AgencyExcessMsrsMember2020-09-300001514281mitt:AgencyExcessMsrsMember2020-01-012020-09-300001514281mitt:CreditExcessMsrsMember2020-09-300001514281mitt:CreditExcessMsrsMember2020-01-012020-09-300001514281mitt:AgencyExcessMsrsMember2019-12-310001514281mitt:AgencyExcessMsrsMember2019-01-012019-12-310001514281mitt:CreditExcessMsrsMember2019-12-310001514281mitt:CreditExcessMsrsMember2019-01-012019-12-3100015142812019-01-012019-12-310001514281us-gaap:FairValueInputsLevel1Membermitt:AgencyResidentialMortgageBackedSecuritiesThirtyYearsFixedRateMember2020-09-300001514281us-gaap:FairValueInputsLevel2Membermitt:AgencyResidentialMortgageBackedSecuritiesThirtyYearsFixedRateMember2020-09-300001514281us-gaap:FairValueInputsLevel3Membermitt:AgencyResidentialMortgageBackedSecuritiesThirtyYearsFixedRateMember2020-09-300001514281us-gaap:FairValueInputsLevel1Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-09-300001514281us-gaap:FairValueInputsLevel2Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-09-300001514281us-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-09-300001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:FairValueInputsLevel1Member2020-09-300001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:FairValueInputsLevel2Member2020-09-300001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:FairValueInputsLevel3Member2020-09-300001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2020-09-300001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-09-300001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2020-09-300001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2020-09-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel1Member2020-09-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel2Member2020-09-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel3Member2020-09-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2020-09-300001514281us-gaap:FairValueInputsLevel1Member2020-09-300001514281us-gaap:FairValueInputsLevel2Member2020-09-300001514281us-gaap:FairValueInputsLevel3Member2020-09-300001514281us-gaap:FairValueInputsLevel1Membermitt:AgencyResidentialMortgageBackedSecuritiesThirtyYearsFixedRateMember2019-12-310001514281us-gaap:FairValueInputsLevel2Membermitt:AgencyResidentialMortgageBackedSecuritiesThirtyYearsFixedRateMember2019-12-310001514281us-gaap:FairValueInputsLevel3Membermitt:AgencyResidentialMortgageBackedSecuritiesThirtyYearsFixedRateMember2019-12-310001514281mitt:AgencyResidentialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel1Member2019-12-310001514281mitt:AgencyResidentialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel2Member2019-12-310001514281mitt:AgencyResidentialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel3Member2019-12-310001514281us-gaap:FairValueInputsLevel1Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-12-310001514281us-gaap:FairValueInputsLevel2Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-12-310001514281us-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:FairValueInputsLevel1Member2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:FairValueInputsLevel2Member2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:FairValueInputsLevel3Member2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel1Member2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel2Member2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel3Member2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2019-12-310001514281us-gaap:FairValueInputsLevel1Member2019-12-310001514281us-gaap:FairValueInputsLevel2Member2019-12-310001514281us-gaap:FairValueInputsLevel3Member2019-12-310001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-06-300001514281us-gaap:ResidentialMortgageMember2020-06-300001514281us-gaap:CommercialLoanMember2020-06-300001514281mitt:ExcessMortgageServicingRightsMember2020-06-300001514281mitt:AgArcMember2020-06-300001514281mitt:SecuritizedDebtMember2020-06-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-07-012020-09-300001514281us-gaap:ResidentialMortgageMember2020-07-012020-09-300001514281us-gaap:CommercialLoanMember2020-07-012020-09-300001514281mitt:ExcessMortgageServicingRightsMember2020-07-012020-09-300001514281mitt:AgArcMember2020-07-012020-09-300001514281mitt:SecuritizedDebtMember2020-07-012020-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-01-012020-09-300001514281us-gaap:ResidentialMortgageMember2020-01-012020-09-300001514281us-gaap:CommercialLoanMember2020-01-012020-09-300001514281mitt:ExcessMortgageServicingRightsMember2020-01-012020-09-300001514281mitt:AgArcMember2020-01-012020-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-09-300001514281us-gaap:ResidentialMortgageMember2020-09-300001514281us-gaap:CommercialLoanMember2020-09-300001514281mitt:ExcessMortgageServicingRightsMember2020-09-300001514281mitt:AgArcMember2020-09-300001514281mitt:SecuritizedDebtMember2020-09-300001514281us-gaap:FairValueInputsLevel2Memberus-gaap:ResidentialMortgageMember2020-07-012020-09-300001514281mitt:DebtSecuritiesUnrealizedGainLossMember2020-07-012020-09-300001514281us-gaap:GainLossOnDerivativeInstrumentsMember2020-07-012020-09-300001514281mitt:DebtSecuritiesRealizedGainLossMember2020-07-012020-09-300001514281mitt:IncomeLossFromEquityMethodInvestmentsMember2020-07-012020-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-06-300001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2019-06-300001514281us-gaap:AssetBackedSecuritiesMember2019-06-300001514281us-gaap:CommercialMortgageBackedSecuritiesMember2019-06-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2019-06-300001514281us-gaap:ResidentialMortgageMember2019-06-300001514281us-gaap:CommercialLoanMember2019-06-300001514281mitt:ExcessMortgageServicingRightsMember2019-06-300001514281mitt:AgArcMember2019-06-300001514281mitt:SecuritizedDebtMember2019-06-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-07-012019-09-300001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2019-07-012019-09-300001514281us-gaap:AssetBackedSecuritiesMember2019-07-012019-09-300001514281us-gaap:CommercialMortgageBackedSecuritiesMember2019-07-012019-09-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2019-07-012019-09-300001514281us-gaap:ResidentialMortgageMember2019-07-012019-09-300001514281us-gaap:CommercialLoanMember2019-07-012019-09-300001514281mitt:ExcessMortgageServicingRightsMember2019-07-012019-09-300001514281mitt:AgArcMember2019-07-012019-09-300001514281mitt:SecuritizedDebtMember2019-07-012019-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-09-300001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2019-09-300001514281us-gaap:AssetBackedSecuritiesMember2019-09-300001514281us-gaap:CommercialMortgageBackedSecuritiesMember2019-09-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2019-09-300001514281us-gaap:ResidentialMortgageMember2019-09-300001514281us-gaap:CommercialLoanMember2019-09-300001514281mitt:ExcessMortgageServicingRightsMember2019-09-300001514281mitt:AgArcMember2019-09-300001514281mitt:SecuritizedDebtMember2019-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:FairValueInputsLevel3Member2019-07-012019-09-300001514281mitt:DebtSecuritiesUnrealizedGainLossMember2019-07-012019-09-300001514281us-gaap:GainLossOnDerivativeInstrumentsMember2019-07-012019-09-300001514281mitt:DebtSecuritiesRealizedGainLossMember2019-07-012019-09-300001514281mitt:IncomeLossFromEquityMethodInvestmentsMember2019-07-012019-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2019-12-310001514281us-gaap:ResidentialMortgageMember2019-12-310001514281us-gaap:CommercialLoanMember2019-12-310001514281mitt:ExcessMortgageServicingRightsMember2019-12-310001514281mitt:AgArcMember2019-12-310001514281mitt:SecuritizedDebtMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2020-01-012020-09-300001514281us-gaap:CommercialMortgageBackedSecuritiesMember2020-01-012020-09-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2020-01-012020-09-300001514281mitt:SecuritizedDebtMember2020-01-012020-09-300001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2020-09-300001514281us-gaap:CommercialMortgageBackedSecuritiesMember2020-09-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2020-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:FairValueInputsLevel2Member2020-01-012020-09-300001514281us-gaap:FairValueInputsLevel2Membermitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2020-01-012020-09-300001514281us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMember2020-01-012020-09-300001514281us-gaap:FairValueInputsLevel2Membermitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2020-01-012020-09-300001514281mitt:SecuritizedDebtMemberus-gaap:FairValueInputsLevel2Member2020-01-012020-09-300001514281mitt:SecuritizedDebtMemberus-gaap:FairValueInputsLevel3Member2020-01-012020-09-300001514281mitt:DebtSecuritiesUnrealizedGainLossMember2020-01-012020-09-300001514281us-gaap:GainLossOnDerivativeInstrumentsMember2020-01-012020-09-300001514281mitt:DebtSecuritiesRealizedGainLossMember2020-01-012020-09-300001514281mitt:IncomeLossFromEquityMethodInvestmentsMember2020-01-012020-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2018-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2018-12-310001514281us-gaap:AssetBackedSecuritiesMember2018-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMember2018-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2018-12-310001514281us-gaap:ResidentialMortgageMember2018-12-310001514281us-gaap:CommercialLoanMember2018-12-310001514281mitt:ExcessMortgageServicingRightsMember2018-12-310001514281mitt:AgArcMember2018-12-310001514281mitt:SecuritizedDebtMember2018-12-310001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-01-012019-09-300001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMember2019-01-012019-09-300001514281us-gaap:AssetBackedSecuritiesMember2019-01-012019-09-300001514281us-gaap:CommercialMortgageBackedSecuritiesMember2019-01-012019-09-300001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMember2019-01-012019-09-300001514281us-gaap:ResidentialMortgageMember2019-01-012019-09-300001514281us-gaap:CommercialLoanMember2019-01-012019-09-300001514281mitt:ExcessMortgageServicingRightsMember2019-01-012019-09-300001514281mitt:AgArcMember2019-01-012019-09-300001514281mitt:SecuritizedDebtMember2019-01-012019-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:FairValueInputsLevel3Member2019-01-012019-09-300001514281us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:FairValueInputsLevel2Member2019-01-012019-09-300001514281us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMember2019-01-012019-09-300001514281mitt:DebtSecuritiesUnrealizedGainLossMember2019-01-012019-09-300001514281us-gaap:GainLossOnDerivativeInstrumentsMember2019-01-012019-09-300001514281mitt:DebtSecuritiesRealizedGainLossMember2019-01-012019-09-300001514281mitt:IncomeLossFromEquityMethodInvestmentsMember2019-01-012019-09-300001514281us-gaap:MeasurementInputDiscountRateMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281srt:MinimumMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281srt:MinimumMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-09-300001514281srt:MinimumMemberus-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-09-300001514281us-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:MaximumMember2020-09-300001514281us-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:WeightedAverageMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281srt:MinimumMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281srt:MinimumMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMember2020-09-300001514281srt:MinimumMemberus-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMember2020-09-300001514281us-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:MaximumMember2020-09-300001514281us-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:WeightedAverageMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281srt:MinimumMemberus-gaap:MeasurementInputCreditSpreadMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputCreditSpreadMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputCreditSpreadMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281srt:MinimumMembermitt:MeasurementInputRecoveryRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:MeasurementInputRecoveryRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:MeasurementInputRecoveryRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMembersrt:MinimumMembermitt:ExcessMortgageServicingRightsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMembermitt:ExcessMortgageServicingRightsMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMembermitt:ExcessMortgageServicingRightsMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281srt:MinimumMembermitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Member2020-09-300001514281srt:MinimumMembermitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Member2020-09-300001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMember2020-09-300001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMember2020-09-300001514281mitt:ComparableMultipleMembermitt:AgArcMemberus-gaap:FairValueInputsLevel3Member2020-09-300001514281srt:MinimumMembermitt:AgArcMembermitt:ComparableMultipleMemberus-gaap:FairValueInputsLevel3Membermitt:MeasurementInputBookValueMultipleMember2020-09-300001514281mitt:AgArcMembermitt:ComparableMultipleMemberus-gaap:FairValueInputsLevel3Membermitt:MeasurementInputBookValueMultipleMembersrt:MaximumMember2020-09-300001514281mitt:AgArcMembermitt:ComparableMultipleMemberus-gaap:FairValueInputsLevel3Membermitt:MeasurementInputBookValueMultipleMembersrt:WeightedAverageMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMembermitt:AbcMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMembermitt:AbcMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMembermitt:AbcMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:AbcMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:AbcMembersrt:MinimumMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:AbcMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:AbcMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:AbcMembersrt:MinimumMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:AbcMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:AbcMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:AbcMembersrt:MinimumMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:AbcMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281mitt:AbcMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281srt:MinimumMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281srt:MinimumMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281srt:MinimumMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-12-310001514281srt:MinimumMemberus-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2019-12-310001514281us-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:MaximumMember2019-12-310001514281us-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:WeightedAverageMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembermitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembermitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembermitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMembersrt:MinimumMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMembersrt:MinimumMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMembersrt:MinimumMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesInterestOnlyMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:CommercialMortgageBackedSecuritiesMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMembersrt:MinimumMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMembersrt:MinimumMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMembersrt:MinimumMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMembersrt:MinimumMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMembersrt:MinimumMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMembersrt:MinimumMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281srt:MinimumMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281srt:MinimumMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembermitt:RecentTransactionPriceMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281srt:MinimumMemberus-gaap:MeasurementInputCreditSpreadMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputCreditSpreadMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputCreditSpreadMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281srt:MinimumMembermitt:MeasurementInputRecoveryRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MeasurementInputRecoveryRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:MeasurementInputRecoveryRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMember2019-12-310001514281srt:MinimumMemberus-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMember2019-12-310001514281us-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMembersrt:MaximumMember2019-12-310001514281us-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialLoanMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembersrt:MinimumMembermitt:ExcessMortgageServicingRightsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembermitt:ExcessMortgageServicingRightsMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembermitt:ExcessMortgageServicingRightsMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281srt:MinimumMembermitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Member2019-12-310001514281srt:MinimumMembermitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Member2019-12-310001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMember2019-12-310001514281mitt:ExcessMortgageServicingRightsMemberus-gaap:MeasurementInputOfferedPriceMemberus-gaap:ValuationTechniqueConsensusPricingModelMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMember2019-12-310001514281mitt:ComparableMultipleMembermitt:AgArcMemberus-gaap:FairValueInputsLevel3Member2019-12-310001514281srt:MinimumMembermitt:AgArcMembermitt:ComparableMultipleMemberus-gaap:FairValueInputsLevel3Membermitt:MeasurementInputBookValueMultipleMember2019-12-310001514281mitt:AgArcMembermitt:ComparableMultipleMemberus-gaap:FairValueInputsLevel3Membermitt:MeasurementInputBookValueMultipleMembersrt:MaximumMember2019-12-310001514281mitt:AgArcMembermitt:ComparableMultipleMemberus-gaap:FairValueInputsLevel3Membermitt:MeasurementInputBookValueMultipleMembersrt:WeightedAverageMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembermitt:AbcMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembermitt:AbcMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembermitt:AbcMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:AbcMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:AbcMembersrt:MinimumMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:AbcMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:AbcMemberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:AbcMembersrt:MinimumMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:AbcMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:AbcMembermitt:MeasurementInputCollateralLossesMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:AbcMembersrt:MinimumMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:AbcMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:AbcMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281srt:MinimumMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputDiscountRateMembermitt:CommercialMortgageBackedSecuritiesInterestOnlyMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembermitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputDiscountRateMembermitt:CommercialMortgageBackedSecuritiesInterestOnlyMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281srt:MinimumMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281srt:MinimumMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281us-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-09-300001514281us-gaap:MeasurementInputLossSeverityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageMembersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2019-12-310001514281mitt:NetAmountsOfLiabilitiesPresentedInConsolidatedBalanceSheetMember2020-09-300001514281mitt:NetAmountsOfLiabilitiesPresentedInConsolidatedBalanceSheetMember2019-12-310001514281us-gaap:RevolvingCreditFacilityMember2020-09-300001514281us-gaap:RevolvingCreditFacilityMember2019-12-310001514281us-gaap:MaturityUpTo30DaysMember2020-09-300001514281us-gaap:MaturityUpTo30DaysMember2019-12-310001514281mitt:Maturity31To60DaysMember2019-12-310001514281mitt:Maturity61To90DaysMember2019-12-310001514281mitt:MaturityOver180DaysMember2019-12-310001514281us-gaap:ResidentialMortgageMembermitt:Maturity61To90DaysMember2020-09-300001514281us-gaap:ResidentialMortgageMembermitt:Maturity31To60DaysMember2019-12-310001514281us-gaap:ResidentialMortgageMembermitt:MaturityOver180DaysMember2019-12-310001514281us-gaap:CommercialLoanMembermitt:MaturityOver180DaysMember2019-12-310001514281us-gaap:ResidentialMortgageBackedSecuritiesMember2020-09-300001514281us-gaap:ResidentialMortgageBackedSecuritiesMember2019-12-310001514281us-gaap:USTreasurySecuritiesMember2019-12-310001514281mitt:GrossAmountsOfRecognizedAssetsLiabilitiesMember2020-09-300001514281mitt:GrossAmountsOfRecognizedAssetsLiabilitiesMember2019-12-310001514281mitt:RevolvingCreditFacilityBMemberus-gaap:RevolvingCreditFacilityMember2020-09-300001514281mitt:RevolvingCreditFacilityBMemberus-gaap:RevolvingCreditFacilityMember2019-12-310001514281mitt:RevolvingCreditFacilityCMemberus-gaap:RevolvingCreditFacilityMember2020-09-300001514281mitt:RevolvingCreditFacilityCMemberus-gaap:RevolvingCreditFacilityMember2019-12-31mitt:counterparty0001514281mitt:CreditSuisseSecuritiesLLCMember2020-09-300001514281mitt:CreditSuisseSecuritiesLLCMember2020-01-012020-09-300001514281mitt:BarclaysCapitalIncMember2019-12-310001514281mitt:BarclaysCapitalIncMember2019-01-012019-12-310001514281mitt:CitigroupGlobalMarketsIncMemberMember2019-12-310001514281mitt:CitigroupGlobalMarketsIncMemberMember2019-01-012019-12-310001514281us-gaap:InterestRateSwapMember2020-09-300001514281us-gaap:InterestRateSwapMember2019-12-310001514281us-gaap:SwaptionMember2020-09-300001514281us-gaap:SwaptionMember2019-12-310001514281mitt:BritishPoundFuturesMember2020-01-012020-09-300001514281mitt:EuroFutureMember2019-01-012019-12-310001514281mitt:BritishPoundFuturesMember2019-01-012019-12-310001514281us-gaap:InterestRateSwapMember2020-01-012020-09-300001514281us-gaap:InterestRateSwapMember2019-01-012019-12-310001514281us-gaap:LongMemberus-gaap:InterestRateSwapMembercurrency:USD2020-09-300001514281us-gaap:LongMemberus-gaap:InterestRateSwapMembercurrency:USD2019-12-310001514281us-gaap:LongMembermitt:NotionalAmountOfSwaptionsMembercurrency:USD2020-09-300001514281us-gaap:LongMembermitt:NotionalAmountOfSwaptionsMembercurrency:USD2019-12-310001514281mitt:BritishPoundFuturesMembercurrency:GBPus-gaap:ShortMember2020-09-300001514281mitt:BritishPoundFuturesMembercurrency:GBPus-gaap:ShortMember2019-12-310001514281currency:EURmitt:EuroFutureMemberus-gaap:ShortMember2020-09-300001514281currency:EURmitt:EuroFutureMemberus-gaap:ShortMember2019-12-31iso4217:GBP0001514281mitt:BritishPoundFuturesMember2020-09-30iso4217:EUR0001514281mitt:EuroFutureMember2020-09-300001514281us-gaap:InterestRateSwapMember2020-07-012020-09-300001514281us-gaap:InterestRateSwapMember2019-07-012019-09-300001514281us-gaap:InterestRateSwapMember2020-01-012020-09-300001514281us-gaap:InterestRateSwapMember2019-01-012019-09-300001514281us-gaap:EurodollarFutureMember2020-07-012020-09-300001514281us-gaap:EurodollarFutureMember2019-07-012019-09-300001514281us-gaap:EurodollarFutureMember2020-01-012020-09-300001514281us-gaap:EurodollarFutureMember2019-01-012019-09-300001514281us-gaap:SwaptionMember2020-07-012020-09-300001514281us-gaap:SwaptionMember2019-07-012019-09-300001514281us-gaap:SwaptionMember2020-01-012020-09-300001514281us-gaap:SwaptionMember2019-01-012019-09-300001514281mitt:UsTreasuryFuturesMember2020-07-012020-09-300001514281mitt:UsTreasuryFuturesMember2019-07-012019-09-300001514281mitt:UsTreasuryFuturesMember2020-01-012020-09-300001514281mitt:UsTreasuryFuturesMember2019-01-012019-09-300001514281mitt:BritishPoundFuturesMember2020-07-012020-09-300001514281mitt:BritishPoundFuturesMember2019-07-012019-09-300001514281mitt:BritishPoundFuturesMember2019-01-012019-09-300001514281mitt:EuroFutureMember2020-07-012020-09-300001514281mitt:EuroFutureMember2019-07-012019-09-300001514281mitt:EuroFutureMember2020-01-012020-09-300001514281mitt:EuroFutureMember2019-01-012019-09-300001514281mitt:ToBeAnnouncedSecuritiesMember2020-07-012020-09-300001514281mitt:ToBeAnnouncedSecuritiesMember2019-07-012019-09-300001514281mitt:ToBeAnnouncedSecuritiesMember2020-01-012020-09-300001514281mitt:ToBeAnnouncedSecuritiesMember2019-01-012019-09-300001514281us-gaap:USTreasurySecuritiesMember2020-07-012020-09-300001514281us-gaap:USTreasurySecuritiesMember2019-07-012019-09-300001514281us-gaap:USTreasurySecuritiesMember2020-01-012020-09-300001514281us-gaap:USTreasurySecuritiesMember2019-01-012019-09-300001514281mitt:TwoThousandAndTwentyFiveMember2020-09-300001514281mitt:TwoThousandAndTwentyFiveMember2020-01-012020-09-300001514281mitt:TwoThousandAndThirtyMember2020-09-300001514281mitt:TwoThousandAndThirtyMember2020-01-012020-09-300001514281mitt:TwoThousandAndTwentyMember2019-12-310001514281mitt:TwoThousandAndTwentyMember2019-01-012019-12-310001514281mitt:TwoThousandAndTwentyTwoMember2019-12-310001514281mitt:TwoThousandAndTwentyTwoMember2019-01-012019-12-310001514281mitt:TwoThousandAndTwentyThreeMember2019-12-310001514281mitt:TwoThousandAndTwentyThreeMember2019-01-012019-12-310001514281mitt:TwoThousandAndTwentyFourMember2019-12-310001514281mitt:TwoThousandAndTwentyFourMember2019-01-012019-12-310001514281mitt:TwoThousandAndTwentySixMember2019-12-310001514281mitt:TwoThousandAndTwentySixMember2019-01-012019-12-310001514281mitt:TwoThousandAndTwentyNineMember2019-12-310001514281mitt:TwoThousandAndTwentyNineMember2019-01-012019-12-310001514281us-gaap:LongMembermitt:ToBeAnnouncedSecuritiesMember2019-06-300001514281us-gaap:LongMembermitt:ToBeAnnouncedSecuritiesMember2019-07-012019-09-300001514281us-gaap:LongMembermitt:ToBeAnnouncedSecuritiesMember2019-09-300001514281mitt:ToBeAnnouncedSecuritiesMemberus-gaap:ShortMember2019-06-300001514281mitt:ToBeAnnouncedSecuritiesMemberus-gaap:ShortMember2019-07-012019-09-300001514281mitt:ToBeAnnouncedSecuritiesMemberus-gaap:ShortMember2019-09-300001514281us-gaap:LongMembermitt:ToBeAnnouncedSecuritiesMember2019-12-310001514281us-gaap:LongMembermitt:ToBeAnnouncedSecuritiesMember2020-01-012020-09-300001514281us-gaap:LongMembermitt:ToBeAnnouncedSecuritiesMember2020-09-300001514281us-gaap:LongMembermitt:ToBeAnnouncedSecuritiesMember2018-12-310001514281us-gaap:LongMembermitt:ToBeAnnouncedSecuritiesMember2019-01-012019-09-300001514281mitt:ToBeAnnouncedSecuritiesMemberus-gaap:ShortMember2018-12-310001514281mitt:ToBeAnnouncedSecuritiesMemberus-gaap:ShortMember2019-01-012019-09-300001514281us-gaap:RestrictedStockUnitsRSUMembermitt:ManagerMember2020-09-300001514281us-gaap:RestrictedStockUnitsRSUMembermitt:ManagerMember2019-09-300001514281us-gaap:SubsequentEventMembermitt:SeriesACumulativeReedmablePreferredStockMember2020-11-060001514281us-gaap:SubsequentEventMembermitt:SeriesBCumulativeReedmablePreferredStockMember2020-11-060001514281us-gaap:SubsequentEventMembermitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2020-11-060001514281us-gaap:SubsequentEventMember2020-11-0600015142812019-03-152019-03-1500015142812019-06-142019-06-1400015142812019-09-062019-09-0600015142812019-03-152019-09-060001514281mitt:SeriesACumulativeReedmablePreferredStockMember2020-02-142020-02-140001514281mitt:SeriesBCumulativeReedmablePreferredStockMember2020-02-142020-02-140001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2020-02-142020-02-140001514281mitt:SeriesACumulativeReedmablePreferredStockMember2019-02-152019-02-150001514281mitt:SeriesBCumulativeReedmablePreferredStockMember2019-02-152019-02-150001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2019-02-152019-02-150001514281mitt:SeriesACumulativeReedmablePreferredStockMember2019-05-172019-05-170001514281mitt:SeriesBCumulativeReedmablePreferredStockMember2019-08-162019-08-160001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2019-05-172019-05-170001514281mitt:SeriesACumulativeReedmablePreferredStockMember2018-08-162018-08-160001514281mitt:SeriesBCumulativeReedmablePreferredStockMember2018-08-162018-08-160001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2019-08-162019-08-160001514281mitt:ReimbursementToManagerMember2020-09-300001514281mitt:ReimbursementToManagerMember2019-12-310001514281mitt:PromissoryNoteMemberus-gaap:SeniorNotesMembermitt:ManagerMember2020-04-100001514281mitt:ManagerEquityIncentivePlanMember2020-04-152020-04-150001514281srt:MaximumMembermitt:ManagerEquityIncentivePlanMember2020-01-012020-09-300001514281mitt:ManagerEquityIncentivePlanMember2020-09-300001514281us-gaap:RestrictedStockMembersrt:DirectorMember2020-01-012020-09-300001514281mitt:ManagerMember2020-01-012020-09-300001514281us-gaap:RestrictedStockMembermitt:ManagerMember2020-01-012020-09-3000015142812018-01-012018-12-310001514281srt:MinimumMember2019-01-012019-12-310001514281srt:MaximumMember2019-01-012019-12-31mitt:numberOfDirectors00015142812020-03-2400015142812020-03-2500015142812020-06-1800015142812020-06-190001514281mitt:AgArcLlcMember2020-09-300001514281mitt:AgArcLlcMember2019-12-310001514281mitt:NonQualifiedMortgageLoansMembermitt:AgArcLlcMember2020-09-300001514281mitt:MortgageAcquisitionTrustMember2017-08-292017-08-290001514281mitt:MortgageAcquisitionTrustMember2019-03-282019-03-280001514281mitt:MortgageAcquisitionTrustMember2019-08-232019-08-230001514281mitt:LotLoansIMember2020-09-300001514281mitt:LotLoansIIMember2020-09-300001514281mitt:ArcHomeLlcMember2020-07-012020-09-300001514281mitt:ArcHomeLlcMember2020-01-012020-09-300001514281mitt:ArcHomeLlcMember2019-07-012019-09-300001514281mitt:ArcHomeLlcMember2019-01-012019-09-300001514281mitt:March2019SellingAffiliateMember2019-03-310001514281mitt:NonQualifiedMortgageLoansMember2019-06-300001514281mitt:SeniorTranchesMember2019-06-300001514281mitt:July2019SellingAffiliateMember2019-07-310001514281mitt:NonQualifiedMortgageLoansMember2019-09-300001514281mitt:SeniorTranchesMember2019-09-300001514281mitt:October2019SellingAffiliatesMember2019-10-310001514281mitt:NonQualifiedMortgageLoansMember2019-11-300001514281mitt:SeniorTranchesMember2019-12-310001514281mitt:NonQualifiedMortgageLoansMember2020-02-290001514281mitt:SeniorTranchesMember2020-03-310001514281mitt:July2020SellingAffiliatesMember2020-07-310001514281mitt:NonQualifiedMortgageLoansMember2020-08-3100015142812018-05-020001514281us-gaap:PrivatePlacementMember2011-01-012011-12-310001514281us-gaap:PrivatePlacementMember2011-12-310001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2019-09-172019-09-170001514281us-gaap:OverAllotmentOptionMembermitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMember2019-09-172019-09-1700015142812019-09-172019-09-1700015142812015-11-030001514281mitt:RepurchaseMember2020-09-300001514281mitt:SaleAgentsMember2017-05-052017-05-050001514281mitt:SaleAgentsMember2020-07-012020-09-300001514281mitt:SaleAgentsMember2020-01-012020-09-300001514281mitt:SaleAgentsMember2019-07-012019-09-300001514281mitt:SaleAgentsMember2019-01-012019-09-300001514281mitt:SaleAgentsMember2017-05-052020-09-300001514281mitt:SaleAgentsMember2020-09-3000015142812019-02-142019-02-1400015142812019-02-140001514281us-gaap:PreferredStockMembermitt:SeriesACumulativeReedmablePreferredStockMember2020-08-140001514281mitt:SeriesBCumulativeReedmablePreferredStockMemberus-gaap:PreferredStockMember2020-08-140001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2020-08-140001514281us-gaap:PreferredStockMembermitt:SeriesACumulativeReedmablePreferredStockMember2020-08-142020-08-140001514281mitt:SeriesBCumulativeReedmablePreferredStockMemberus-gaap:PreferredStockMember2020-08-142020-08-140001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2020-08-142020-08-140001514281us-gaap:PreferredStockMember2020-08-142020-08-140001514281us-gaap:CommonStockMember2020-08-142020-08-140001514281us-gaap:PreferredStockMembermitt:SeriesACumulativeReedmablePreferredStockMember2020-09-300001514281mitt:SeriesBCumulativeReedmablePreferredStockMemberus-gaap:PreferredStockMember2020-09-300001514281mitt:AGMITCMOVRBCBarbadosTradingCorpMemberus-gaap:SettledLitigationMember2020-03-252020-03-250001514281us-gaap:SettledLitigationMember2020-01-012020-09-300001514281mitt:LotLoansMember2020-01-012020-09-300001514281mitt:LoanGMemberus-gaap:CommercialPortfolioSegmentMember2020-07-012020-09-300001514281mitt:LoanGMemberus-gaap:CommercialPortfolioSegmentMember2020-06-302020-06-300001514281mitt:LoanGMemberus-gaap:CommercialPortfolioSegmentMember2020-09-302020-09-300001514281mitt:PortfolioOfSingleFamilyRentalPropertiesMember2019-11-012019-11-300001514281us-gaap:OperatingSegmentsMembermitt:SingleFamilyRentalPropertiesSegmentMember2020-07-012020-09-300001514281us-gaap:OperatingSegmentsMembermitt:SingleFamilyRentalPropertiesSegmentMember2019-07-012019-09-300001514281us-gaap:OperatingSegmentsMembermitt:SingleFamilyRentalPropertiesSegmentMember2020-01-012020-09-300001514281us-gaap:OperatingSegmentsMembermitt:SingleFamilyRentalPropertiesSegmentMember2019-01-012019-09-300001514281us-gaap:OperatingSegmentsMembermitt:SingleFamilyRentalPropertiesSegmentMember2020-09-300001514281us-gaap:OperatingSegmentsMembermitt:SingleFamilyRentalPropertiesSegmentMember2019-12-310001514281us-gaap:CommonStockMember2020-09-302020-09-3000015142812020-09-302020-09-300001514281us-gaap:PreferredStockMembermitt:SeriesACumulativeReedmablePreferredStockMember2020-09-302020-09-300001514281mitt:SeriesBCumulativeReedmablePreferredStockMemberus-gaap:PreferredStockMember2020-09-302020-09-300001514281mitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2020-09-302020-09-300001514281us-gaap:SubsequentEventMemberus-gaap:CommonStockMember2020-10-022020-10-020001514281us-gaap:SubsequentEventMember2020-10-022020-10-020001514281us-gaap:SubsequentEventMembermitt:SeriesCFixedtoFloatingRateCumulativeRedeemablePreferredMemberus-gaap:PreferredStockMember2020-10-022020-10-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549 

__________________________________________________

FORM 10-Q

__________________________________________________ 

(Mark One)

☒			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2020

OR

☐			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                          to                         

Commission file number 001-35151

_____________________________________________________________________ 

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 and Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).   Yes   ý    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large Accelerated filer ¨     Accelerated filer ý Non-Accelerated filer ¨ Smaller reporting company ☒  Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨ 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).   

Yes   ☐     No   ý

As of November 4, 2020, there were 40,721,831 outstanding shares of common stock of AG Mortgage Investment Trust, Inc.

AG MORTGAGE INVESTMENT TRUST, INC.

TABLE OF CONTENTS

						Page
PART I.     FINANCIAL INFORMATION
Item 1.			Financial Statements (unaudited)
			Consolidated Balance Sheets as of September 30, 2020 and December 31, 2019			3
			Consolidated Statements of Operations for the three and nine months ended September 30, 2020 and September 30, 2019			4
			Consolidated Statements of Stockholders’ Equity for the three and nine months ended September 30, 2020 and September 30, 2019			5
			Consolidated Statements of Cash Flows for the nine months ended September 30, 2020 and September 30, 2019			7
			Notes to Consolidated Financial Statements (unaudited)			9
Item 2.			Management’s Discussion and Analysis of Financial Condition and Results of Operations			60
Item 3.			Quantitative and Qualitative Disclosures About Market Risk			111
Item 4.			Controls and Procedures			116
PART II.    OTHER INFORMATION						116
Item 1.			Legal Proceedings			116
Item 1A.			Risk Factors			117
Item 2.			Unregistered Sales of Equity Securities and Use of Proceeds			122
Item 3.			Defaults Upon Senior Securities			122
Item 4.			Mine Safety Disclosures			123
Item 5.			Other Information			123
Item 6.			Exhibits			124