Document
false--12-31FY20182018-12-310001363829YesfalseLarge Accelerated FilerEnstar Group LTDfalsefalseNoYesESGR6265000001560000010P30DP3M6103P3M2410.0010.001P10YP4Y0024000000208097000151433000160000000001111.00111.001110000001940672240477116402279259967240477116402279259967221459997910010179503152599672017950315025996727140151940672240477116402279259967240477116402279259967221459997910010179503152599672091001017950315025996720.03P3YP5Y00000.300.30P65DP2YP3YP15YP4Y0113000000.0170.393650000000005837000000.0700145000000388571388571388571160004400160004400388571388571388571160004400388571160004400P4YP3YP3YP2YP3Y00388571388571388571388571000000 0001363829 2018-01-01 2018-12-31 0001363829 esgr:MaidenReNorthAmericaMember 2018-01-01 2018-12-31 0001363829 esgr:KaylaReHoldingsLtdMember 2018-01-01 2018-12-31 0001363829 esgr:MaidenReNorthAmericaAndKaylaMember 2018-01-01 2018-12-31 0001363829 esgr:DanaCompaniesLLCMember 2018-01-01 2018-12-31 0001363829 us-gaap:NonvotingCommonStockMember 2019-02-28 0001363829 2018-06-30 0001363829 esgr:VotingCommonStockMember 2019-02-28 0001363829 2017-12-31 0001363829 2018-12-31 0001363829 us-gaap:FixedMaturitiesMember 2018-12-31 0001363829 us-gaap:FixedMaturitiesMember 2017-12-31 0001363829 us-gaap:CommonClassCMember 2017-12-31 0001363829 us-gaap:SeriesDPreferredStockMember 2017-12-31 0001363829 us-gaap:ShortTermInvestmentsMember 2018-12-31 0001363829 us-gaap:SeriesEPreferredStockMember 2018-12-31 0001363829 us-gaap:SeriesCPreferredStockMember 2018-12-31 0001363829 us-gaap:SeriesDPreferredStockMember 2018-12-31 0001363829 us-gaap:SeriesEPreferredStockMember 2017-12-31 0001363829 esgr:CommonClassEMember 2017-12-31 0001363829 esgr:VotingCommonStockMember 2017-12-31 0001363829 us-gaap:ShortTermInvestmentsMember 2017-12-31 0001363829 esgr:VotingCommonStockMember 2018-12-31 0001363829 us-gaap:CommonClassCMember 2018-12-31 0001363829 esgr:CommonClassEMember 2018-12-31 0001363829 us-gaap:SeriesCPreferredStockMember 2017-12-31 0001363829 2017-01-01 2017-12-31 0001363829 2016-01-01 2016-12-31 0001363829 us-gaap:RetainedEarningsMember 2017-12-31 0001363829 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-12-31 0001363829 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2015-12-31 0001363829 us-gaap:SeriesEPreferredStockMember us-gaap:PreferredStockMember 2016-01-01 2016-12-31 0001363829 us-gaap:AdditionalPaidInCapitalMember 2015-12-31 0001363829 us-gaap:CommonClassCMember us-gaap:CommonStockMember 2018-12-31 0001363829 us-gaap:NoncontrollingInterestMember 2017-01-01 2017-12-31 0001363829 us-gaap:RetainedEarningsMember 2018-01-01 2018-12-31 0001363829 us-gaap:SeriesEPreferredStockMember us-gaap:PreferredStockMember 2017-12-31 0001363829 us-gaap:AccumulatedTranslationAdjustmentMember 2017-01-01 2017-12-31 0001363829 us-gaap:RetainedEarningsMember 2017-01-01 2017-12-31 0001363829 us-gaap:NoncontrollingInterestMember 2018-01-01 2018-12-31 0001363829 esgr:CommonClassEMember us-gaap:CommonStockMember 2017-12-31 0001363829 us-gaap:SeriesDPreferredStockMember us-gaap:PreferredStockMember 2017-12-31 0001363829 us-gaap:AdditionalPaidInCapitalMember 2016-01-01 2016-12-31 0001363829 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2017-12-31 0001363829 us-gaap:CommonClassAMember us-gaap:CommonStockMember 2018-01-01 2018-12-31 0001363829 us-gaap:RetainedEarningsMember 2016-01-01 2016-12-31 0001363829 esgr:CommonClassEMember us-gaap:CommonStockMember 2016-01-01 2016-12-31 0001363829 esgr:CommonClassEMember us-gaap:CommonStockMember 2017-01-01 2017-12-31 0001363829 us-gaap:SeriesEPreferredStockMember us-gaap:PreferredStockMember 2017-01-01 2017-12-31 0001363829 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-01-01 2018-12-31 0001363829 us-gaap:SeriesCPreferredStockMember us-gaap:PreferredStockMember 2017-01-01 2017-12-31 0001363829 us-gaap:SeriesDPreferredStockMember us-gaap:PreferredStockMember 2017-01-01 2017-12-31 0001363829 esgr:VotingCommonStockMember us-gaap:CommonStockMember 2016-01-01 2016-12-31 0001363829 us-gaap:RetainedEarningsMember 2016-12-31 0001363829 us-gaap:AccumulatedTranslationAdjustmentMember 2018-01-01 2018-12-31 0001363829 esgr:VotingCommonStockMember us-gaap:CommonStockMember 2015-12-31 0001363829 us-gaap:SeriesCPreferredStockMember us-gaap:PreferredStockMember 2018-01-01 2018-12-31 0001363829 us-gaap:AdditionalPaidInCapitalMember 2017-01-01 2017-12-31 0001363829 us-gaap:SeriesEPreferredStockMember us-gaap:PreferredStockMember 2016-12-31 0001363829 esgr:VotingCommonStockMember us-gaap:CommonStockMember 2016-12-31 0001363829 us-gaap:AccumulatedTranslationAdjustmentMember 2016-12-31 0001363829 us-gaap:NoncontrollingInterestMember 2017-12-31 0001363829 us-gaap:SeriesDPreferredStockMember us-gaap:PreferredStockMember 2016-12-31 0001363829 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2015-12-31 0001363829 us-gaap:AccumulatedTranslationAdjustmentMember 2016-01-01 2016-12-31 0001363829 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-12-31 0001363829 us-gaap:AccumulatedTranslationAdjustmentMember 2018-12-31 0001363829 us-gaap:AdditionalPaidInCapitalMember 2018-01-01 2018-12-31 0001363829 us-gaap:CommonClassCMember us-gaap:CommonStockMember 2017-01-01 2017-12-31 0001363829 us-gaap:AccumulatedTranslationAdjustmentMember 2017-12-31 0001363829 us-gaap:SeriesEPreferredStockMember us-gaap:PreferredStockMember 2018-12-31 0001363829 us-gaap:CommonClassCMember us-gaap:CommonStockMember 2017-12-31 0001363829 esgr:VotingCommonStockMember us-gaap:CommonStockMember 2017-12-31 0001363829 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2015-12-31 0001363829 us-gaap:CommonClassAMember us-gaap:CommonStockMember 2017-12-31 0001363829 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2018-12-31 0001363829 us-gaap:NoncontrollingInterestMember 2015-12-31 0001363829 esgr:CommonClassEMember us-gaap:CommonStockMember 2018-12-31 0001363829 esgr:CommonClassEMember us-gaap:CommonStockMember 2016-12-31 0001363829 us-gaap:NoncontrollingInterestMember 2016-12-31 0001363829 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2016-12-31 0001363829 us-gaap:CommonClassAMember us-gaap:CommonStockMember 2017-01-01 2017-12-31 0001363829 us-gaap:CommonClassCMember us-gaap:CommonStockMember 2015-12-31 0001363829 us-gaap:CommonClassAMember us-gaap:CommonStockMember 2016-12-31 0001363829 us-gaap:CommonClassAMember us-gaap:CommonStockMember 2016-01-01 2016-12-31 0001363829 us-gaap:SeriesCPreferredStockMember us-gaap:PreferredStockMember 2017-12-31 0001363829 us-gaap:NoncontrollingInterestMember 2016-01-01 2016-12-31 0001363829 us-gaap:SeriesDPreferredStockMember us-gaap:PreferredStockMember 2018-01-01 2018-12-31 0001363829 us-gaap:TreasuryStockMember 2016-12-31 0001363829 us-gaap:AccumulatedTranslationAdjustmentMember 2015-12-31 0001363829 esgr:VotingCommonStockMember us-gaap:CommonStockMember 2018-01-01 2018-12-31 0001363829 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-12-31 0001363829 us-gaap:TreasuryStockMember 2017-12-31 0001363829 esgr:VotingCommonStockMember us-gaap:CommonStockMember 2018-12-31 0001363829 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-12-31 0001363829 us-gaap:SeriesDPreferredStockMember us-gaap:PreferredStockMember 2018-12-31 0001363829 us-gaap:CommonClassCMember us-gaap:CommonStockMember 2018-01-01 2018-12-31 0001363829 us-gaap:NoncontrollingInterestMember 2018-12-31 0001363829 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2016-12-31 0001363829 us-gaap:CommonClassCMember us-gaap:CommonStockMember 2016-01-01 2016-12-31 0001363829 us-gaap:CommonClassCMember us-gaap:CommonStockMember 2016-12-31 0001363829 us-gaap:AdditionalPaidInCapitalMember 2018-12-31 0001363829 us-gaap:AdditionalPaidInCapitalMember 2016-12-31 0001363829 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2018-01-01 2018-12-31 0001363829 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-01-01 2017-12-31 0001363829 us-gaap:SeriesCPreferredStockMember us-gaap:PreferredStockMember 2015-12-31 0001363829 us-gaap:RetainedEarningsMember 2015-12-31 0001363829 esgr:VotingCommonStockMember us-gaap:CommonStockMember 2017-01-01 2017-12-31 0001363829 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2016-01-01 2016-12-31 0001363829 us-gaap:SeriesEPreferredStockMember us-gaap:PreferredStockMember 2015-12-31 0001363829 us-gaap:AdditionalPaidInCapitalMember 2017-12-31 0001363829 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2016-12-31 0001363829 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2016-01-01 2016-12-31 0001363829 us-gaap:SeriesEPreferredStockMember us-gaap:PreferredStockMember 2018-01-01 2018-12-31 0001363829 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2017-01-01 2017-12-31 0001363829 esgr:CommonClassEMember us-gaap:CommonStockMember 2018-01-01 2018-12-31 0001363829 us-gaap:SeriesDPreferredStockMember us-gaap:PreferredStockMember 2015-12-31 0001363829 us-gaap:SeriesCPreferredStockMember us-gaap:PreferredStockMember 2016-12-31 0001363829 us-gaap:SeriesCPreferredStockMember us-gaap:PreferredStockMember 2016-01-01 2016-12-31 0001363829 us-gaap:RetainedEarningsMember 2018-12-31 0001363829 us-gaap:CommonClassAMember us-gaap:CommonStockMember 2015-12-31 0001363829 us-gaap:TreasuryStockMember 2018-12-31 0001363829 us-gaap:SeriesDPreferredStockMember us-gaap:PreferredStockMember 2016-01-01 2016-12-31 0001363829 us-gaap:SeriesCPreferredStockMember us-gaap:PreferredStockMember 2018-12-31 0001363829 esgr:CommonClassEMember us-gaap:CommonStockMember 2015-12-31 0001363829 2016-12-31 0001363829 2015-12-31 0001363829 esgr:AtriumSegmentMember 2018-01-01 2018-12-31 0001363829 us-gaap:AccountingStandardsUpdate201601Member us-gaap:RetainedEarningsMember 2017-12-31 0001363829 us-gaap:AccountingStandardsUpdate201602Member us-gaap:SubsequentEventMember 2019-01-01 0001363829 esgr:MaidenReNorthAmericaMember 2018-12-27 0001363829 esgr:MaidenReNorthAmericaMember 2018-12-27 2018-12-27 0001363829 esgr:KaylaReHoldingsLtdMember 2018-05-14 2018-05-14 0001363829 esgr:KaylaReHoldingsLtdMember 2018-05-14 0001363829 esgr:KaylaReHoldingsLtdMember esgr:FairValueAdjustmentsMember 2018-05-14 0001363829 esgr:KaylaReHoldingsLtdMember us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-05-14 0001363829 esgr:KaylaReHoldingsLtdMember us-gaap:CarryingReportedAmountFairValueDisclosureMember 2018-05-14 0001363829 esgr:KaylaReHoldingsLtdMember 2018-05-13 0001363829 esgr:KaylaReHoldingsLtdMember 2018-04-01 2018-06-30 0001363829 esgr:KaylaReHoldingsLtdMember esgr:CommonClassEMember 2018-05-14 2018-05-14 0001363829 esgr:KaylaReHoldingsLtdMember us-gaap:CommonStockMember 2018-05-14 2018-05-14 0001363829 esgr:KaylaReHoldingsLtdMember us-gaap:ProFormaMember 2018-01-01 2018-05-14 0001363829 esgr:NetIncomeLossAdjustmentMember us-gaap:ProFormaMember 2018-01-01 2018-12-31 0001363829 esgr:KaylaReHoldingsLtdMember us-gaap:ProFormaMember 2018-01-01 2018-03-31 0001363829 esgr:KaylaReHoldingsLtdMember us-gaap:ProFormaMember 2018-05-15 2018-12-31 0001363829 esgr:KaylaReHoldingsLtdMember esgr:NetIncomeLossAdjustmentMember us-gaap:ProFormaMember 2018-01-01 2018-12-31 0001363829 us-gaap:ProFormaMember 2017-01-01 2017-12-31 0001363829 esgr:KaylaReHoldingsLtdMember 2017-01-01 2017-12-31 0001363829 esgr:MaidenReNorthAmericaMember 2017-01-01 2017-12-31 0001363829 esgr:NetIncomeLossAdjustmentMember us-gaap:ProFormaMember 2017-01-01 2017-12-31 0001363829 esgr:MaidenReNorthAmericaAndKaylaMember 2017-01-01 2017-12-31 0001363829 us-gaap:ProFormaMember 2018-01-01 2018-12-31 0001363829 esgr:DanaCompaniesLLCMember 2016-12-30 2016-12-30 0001363829 esgr:DanaCompaniesLLCMember 2016-01-01 2016-12-31 0001363829 esgr:DanaCompaniesLLCMember 2016-12-30 0001363829 esgr:DanaCompaniesLLCMember esgr:NonlifeRunoffSegmentMember 2016-12-30 0001363829 esgr:DanaCompaniesLLCMember us-gaap:FixedMaturitiesMember esgr:NonlifeRunoffSegmentMember 2016-12-30 0001363829 esgr:DanaCompaniesLLCMember us-gaap:ShortTermInvestmentsMember esgr:NonlifeRunoffSegmentMember 2016-12-30 0001363829 esgr:KaylaReHoldingsLtdMember 2018-01-01 2018-06-30 0001363829 esgr:MaidenReBermudaMember 2018-11-09 2018-11-09 0001363829 esgr:MaidenReBermudaMember srt:MinimumMember us-gaap:ScenarioForecastMember 2019-04-01 2019-06-30 0001363829 esgr:MaidenReBermudaMember us-gaap:ScenarioForecastMember 2019-04-01 2019-06-30 0001363829 esgr:MaidenReBermudaMember srt:MaximumMember us-gaap:ScenarioForecastMember 2019-04-01 2019-06-30 0001363829 esgr:AmerisureMember us-gaap:ScenarioForecastMember 2019-01-01 2019-03-31 0001363829 esgr:AmTrustRITCMember us-gaap:SubsequentEventMember 2019-02-14 2019-02-14 0001363829 esgr:AllianzMember 2018-12-31 2018-12-31 0001363829 esgr:MaidenReNorthAmericaMember 2018-12-27 2018-12-27 0001363829 esgr:MaidenReNorthAmericaMember 2018-12-27 0001363829 esgr:MaidenReNorthAmericaMember 2018-08-01 2018-08-01 0001363829 esgr:CocaColaMember 2018-08-01 0001363829 esgr:CocaColaMember 2018-08-01 2018-08-01 0001363829 esgr:ZurichMember 2018-02-23 2018-02-23 0001363829 esgr:ZurichMember 2018-02-23 0001363829 esgr:NeonUnderwritingLimitedMember 2018-02-16 0001363829 esgr:NeonUnderwritingLimitedMember 2018-02-16 2018-02-16 0001363829 esgr:NovaeTransactionMember 2018-01-29 2018-01-29 0001363829 esgr:NovaeTransactionMember 2018-01-29 0001363829 esgr:AllianzMember 2017-12-28 2017-12-28 0001363829 esgr:AllianzMember 2017-12-28 0001363829 esgr:RSAInsuranceGroupPLCMember 2017-02-07 2017-02-07 0001363829 esgr:RSAInsuranceGroupPLCMember 2017-02-07 0001363829 esgr:QBEInsuranceGroupLimitedMember 2017-01-11 2017-01-11 0001363829 esgr:QBEInsuranceGroupLimitedMember 2017-01-11 0001363829 esgr:CocaColaMember esgr:LimitedParentalGuaranteeMember 2016-08-05 0001363829 esgr:CocaColaMember 2016-08-05 0001363829 esgr:CocaColaMember us-gaap:OtherAssetsMember 2016-08-05 0001363829 esgr:CocaColaMember 2016-08-05 2016-08-05 0001363829 esgr:AllianzMember 2016-02-17 2016-02-17 0001363829 esgr:AllianzMember 2016-02-17 0001363829 esgr:AllianzMember 2016-02-17 2016-02-17 0001363829 esgr:AllianzMember esgr:LimitedParentalGuaranteeMember 2016-02-17 0001363829 esgr:NeonRITCMember 2016-11-15 2016-11-15 0001363829 esgr:MaidenReBermudaMember 2018-11-08 2018-11-08 0001363829 us-gaap:DiscontinuedOperationsHeldforsaleMember esgr:PavoniaMember 2016-01-01 2016-12-31 0001363829 us-gaap:DiscontinuedOperationsHeldforsaleMember esgr:PavoniaMember 2017-01-01 2017-12-31 0001363829 us-gaap:DiscontinuedOperationsDisposedOfBySaleMember esgr:PavoniaMember 2017-12-31 0001363829 us-gaap:DiscontinuedOperationsDisposedOfBySaleMember esgr:PavoniaMember 2016-01-01 2016-12-31 0001363829 us-gaap:DiscontinuedOperationsDisposedOfBySaleMember esgr:PavoniaMember 2017-01-01 2017-12-31 0001363829 us-gaap:DiscontinuedOperationsDisposedOfBySaleMember esgr:PavoniaMember 2016-12-31 0001363829 us-gaap:DiscontinuedOperationsDisposedOfBySaleMember esgr:PavoniaMember 2017-12-29 0001363829 us-gaap:DiscontinuedOperationsHeldforsaleMember esgr:PavoniaLifeInsuranceCompanyOfNewYorkMember 2018-12-31 0001363829 us-gaap:DiscontinuedOperationsHeldforsaleMember esgr:PavoniaMember 2017-12-29 0001363829 us-gaap:DiscontinuedOperationsHeldforsaleMember esgr:PavoniaLifeInsuranceCompanyOfNewYorkMember 2017-12-31 0001363829 us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember esgr:LagunaMember 2016-01-01 2016-12-31 0001363829 esgr:MonumentMember us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember esgr:LagunaMember srt:AffiliatedEntityMember 2017-08-29 0001363829 us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember esgr:LagunaMember 2017-01-01 2017-12-31 0001363829 esgr:KaylaReHoldingsLtdMember 2017-12-31 0001363829 esgr:OtherEquityMethodInvestmentsMember 2017-12-31 0001363829 esgr:HedgeFundsFixedIncomeMember 2018-01-01 2018-12-31 0001363829 esgr:FixedIncomeFundOneMember us-gaap:FixedIncomeFundsMember 2018-01-01 2018-12-31 0001363829 esgr:OtherEquityMethodInvestmentsMember 2018-12-31 0001363829 esgr:KaylaReHoldingsLtdMember srt:AffiliatedEntityMember 2017-01-01 2017-12-31 0001363829 us-gaap:FixedIncomeFundsMember 2018-01-01 2018-12-31 0001363829 us-gaap:AvailableforsaleSecuritiesMember 2017-12-31 0001363829 esgr:OtherGovernmentAgenciesDebtSecuritiesMember us-gaap:FixedMaturitiesMember 2017-12-31 0001363829 us-gaap:AssetBackedSecuritiesMember 2017-12-31 0001363829 us-gaap:AssetBackedSecuritiesMember us-gaap:FixedMaturitiesMember 2017-12-31 0001363829 us-gaap:MunicipalBondsMember us-gaap:ShortTermInvestmentsMember 2017-12-31 0001363829 us-gaap:MunicipalBondsMember 2017-12-31 0001363829 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FixedMaturitiesMember 2017-12-31 0001363829 us-gaap:CorporateDebtSecuritiesMember 2017-12-31 0001363829 esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember us-gaap:ShortTermInvestmentsMember 2017-12-31 0001363829 us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2017-12-31 0001363829 us-gaap:AssetBackedSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2017-12-31 0001363829 us-gaap:MunicipalBondsMember us-gaap:FixedMaturitiesMember 2017-12-31 0001363829 esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember 2017-12-31 0001363829 us-gaap:USGovernmentAgenciesDebtSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2017-12-31 0001363829 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:ShortTermInvestmentsMember 2017-12-31 0001363829 us-gaap:USGovernmentAgenciesDebtSecuritiesMember us-gaap:FixedMaturitiesMember 2017-12-31 0001363829 esgr:OtherGovernmentAgenciesDebtSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2017-12-31 0001363829 esgr:OtherGovernmentAgenciesDebtSecuritiesMember us-gaap:ShortTermInvestmentsMember 2017-12-31 0001363829 us-gaap:ResidentialMortgageBackedSecuritiesMember 2017-12-31 0001363829 us-gaap:AssetBackedSecuritiesMember us-gaap:ShortTermInvestmentsMember 2017-12-31 0001363829 esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember us-gaap:FixedMaturitiesMember 2017-12-31 0001363829 us-gaap:MunicipalBondsMember esgr:FundsHeldDirectlyManagedMember 2017-12-31 0001363829 us-gaap:CorporateDebtSecuritiesMember us-gaap:ShortTermInvestmentsMember 2017-12-31 0001363829 us-gaap:ResidentialMortgageBackedSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2017-12-31 0001363829 esgr:OtherGovernmentAgenciesDebtSecuritiesMember 2017-12-31 0001363829 us-gaap:CorporateDebtSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2017-12-31 0001363829 esgr:FundsHeldDirectlyManagedMember 2017-12-31 0001363829 esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2017-12-31 0001363829 us-gaap:CommercialMortgageBackedSecuritiesMember 2017-12-31 0001363829 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:ShortTermInvestmentsMember 2017-12-31 0001363829 us-gaap:CorporateDebtSecuritiesMember us-gaap:FixedMaturitiesMember 2017-12-31 0001363829 us-gaap:USGovernmentAgenciesDebtSecuritiesMember us-gaap:ShortTermInvestmentsMember 2017-12-31 0001363829 us-gaap:CommercialMortgageBackedSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2017-12-31 0001363829 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FixedMaturitiesMember 2017-12-31 0001363829 us-gaap:CommercialMortgageBackedSecuritiesMember 2018-12-31 0001363829 us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0001363829 esgr:OtherGovernmentAgenciesDebtSecuritiesMember us-gaap:FixedMaturitiesMember 2018-12-31 0001363829 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FixedMaturitiesMember 2018-12-31 0001363829 us-gaap:CorporateDebtSecuritiesMember us-gaap:ShortTermInvestmentsMember 2018-12-31 0001363829 esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2018-12-31 0001363829 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FixedMaturitiesMember 2018-12-31 0001363829 esgr:FundsHeldDirectlyManagedMember 2018-12-31 0001363829 us-gaap:AssetBackedSecuritiesMember us-gaap:FixedMaturitiesMember 2018-12-31 0001363829 us-gaap:USGovernmentAgenciesDebtSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2018-12-31 0001363829 us-gaap:MunicipalBondsMember us-gaap:ShortTermInvestmentsMember 2018-12-31 0001363829 us-gaap:AssetBackedSecuritiesMember us-gaap:ShortTermInvestmentsMember 2018-12-31 0001363829 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:ShortTermInvestmentsMember 2018-12-31 0001363829 us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 us-gaap:MunicipalBondsMember us-gaap:FixedMaturitiesMember 2018-12-31 0001363829 us-gaap:AssetBackedSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2018-12-31 0001363829 esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember us-gaap:FixedMaturitiesMember 2018-12-31 0001363829 us-gaap:CommercialMortgageBackedSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2018-12-31 0001363829 us-gaap:USGovernmentAgenciesDebtSecuritiesMember us-gaap:FixedMaturitiesMember 2018-12-31 0001363829 esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember us-gaap:ShortTermInvestmentsMember 2018-12-31 0001363829 us-gaap:CorporateDebtSecuritiesMember us-gaap:FixedMaturitiesMember 2018-12-31 0001363829 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:ShortTermInvestmentsMember 2018-12-31 0001363829 esgr:OtherGovernmentAgenciesDebtSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2018-12-31 0001363829 esgr:OtherGovernmentAgenciesDebtSecuritiesMember us-gaap:ShortTermInvestmentsMember 2018-12-31 0001363829 us-gaap:USGovernmentAgenciesDebtSecuritiesMember us-gaap:ShortTermInvestmentsMember 2018-12-31 0001363829 us-gaap:CorporateDebtSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2018-12-31 0001363829 us-gaap:MunicipalBondsMember esgr:FundsHeldDirectlyManagedMember 2018-12-31 0001363829 us-gaap:ResidentialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:OtherGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 us-gaap:ResidentialMortgageBackedSecuritiesMember esgr:FundsHeldDirectlyManagedMember 2018-12-31 0001363829 us-gaap:MunicipalBondsMember 2018-12-31 0001363829 us-gaap:AssetBackedSecuritiesMember 2018-12-31 0001363829 us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember 2017-12-31 0001363829 us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember 2018-12-31 0001363829 esgr:SeniorSecuredDebtSecuritiesMember 2017-12-31 0001363829 esgr:SeniorSecuredDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 us-gaap:ExternalCreditRatingNonInvestmentGradeMember us-gaap:AssetBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAARatingMember esgr:TradingandAvailableforSaleSecuritiesMember esgr:CreditRatingConcentrationRiskMember us-gaap:ExternalCreditRatingInvestmentGradeMember 2018-01-01 2018-12-31 0001363829 us-gaap:ExternalCreditRatingNonInvestmentGradeMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:MarketableSecuritiesMember esgr:PortfolioConcentrationRiskMember us-gaap:CommercialMortgageBackedSecuritiesMember esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember 2018-01-01 2018-12-31 0001363829 esgr:StandardPoorsFitchBBBRatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAAARatingMemberMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:CommercialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:CommercialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAAARatingMemberMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:AssetBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAAARatingMemberMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:NotRatedMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAAARatingMemberMember us-gaap:ExternalCreditRatingInvestmentGradeMember esgr:OtherGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember 2018-12-31 0001363829 esgr:MarketableSecuritiesMember esgr:PortfolioConcentrationRiskMember us-gaap:CorporateDebtSecuritiesMember esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember 2018-01-01 2018-12-31 0001363829 esgr:StandardPoorsFitchBBBRatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0001363829 esgr:NotRatedMember us-gaap:MunicipalBondsMember 2018-12-31 0001363829 esgr:StandardPoorsFitchARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember esgr:OtherGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 us-gaap:ExternalCreditRatingNonInvestmentGradeMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:NotRatedMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchBBBRatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:CommercialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAAARatingMemberMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAAARatingMemberMember us-gaap:ExternalCreditRatingInvestmentGradeMember esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchBBBRatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchBBBRatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchBBBRatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember 2018-12-31 0001363829 us-gaap:ExternalCreditRatingNonInvestmentGradeMember esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:AssetBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:MunicipalBondsMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember esgr:OtherGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 us-gaap:ExternalCreditRatingNonInvestmentGradeMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAAARatingMemberMember us-gaap:ExternalCreditRatingInvestmentGradeMember 2018-12-31 0001363829 esgr:NotRatedMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchBBBRatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:AssetBackedSecuritiesMember 2018-12-31 0001363829 esgr:TradingandAvailableforSaleSecuritiesMember esgr:CreditRatingConcentrationRiskMember us-gaap:ExternalCreditRatingNonInvestmentGradeMember 2018-01-01 2018-12-31 0001363829 esgr:StandardPoorsFitchBBBRatingMember esgr:TradingandAvailableforSaleSecuritiesMember esgr:CreditRatingConcentrationRiskMember us-gaap:ExternalCreditRatingInvestmentGradeMember 2018-01-01 2018-12-31 0001363829 esgr:StandardPoorsFitchARatingMember esgr:TradingandAvailableforSaleSecuritiesMember esgr:CreditRatingConcentrationRiskMember us-gaap:ExternalCreditRatingInvestmentGradeMember 2018-01-01 2018-12-31 0001363829 esgr:StandardPoorsFitchAAARatingMemberMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:MunicipalBondsMember 2018-12-31 0001363829 esgr:NotRatedMember esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0001363829 esgr:MarketableSecuritiesMember esgr:PortfolioConcentrationRiskMember esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember 2018-01-01 2018-12-31 0001363829 esgr:StandardPoorsFitchARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:AssetBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:CommercialMortgageBackedSecuritiesMember 2018-12-31 0001363829 us-gaap:ExternalCreditRatingNonInvestmentGradeMember us-gaap:CommercialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:NotRatedMember 2018-12-31 0001363829 esgr:NotRatedMember esgr:OtherGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 us-gaap:ExternalCreditRatingNonInvestmentGradeMember us-gaap:MunicipalBondsMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAAARatingMemberMember esgr:TradingandAvailableforSaleSecuritiesMember esgr:CreditRatingConcentrationRiskMember us-gaap:ExternalCreditRatingInvestmentGradeMember 2018-01-01 2018-12-31 0001363829 esgr:MarketableSecuritiesMember esgr:PortfolioConcentrationRiskMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember 2018-01-01 2018-12-31 0001363829 esgr:StandardPoorsFitchAARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchBBBRatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:MunicipalBondsMember 2018-12-31 0001363829 esgr:MarketableSecuritiesMember esgr:PortfolioConcentrationRiskMember us-gaap:ResidentialMortgageBackedSecuritiesMember esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember 2018-01-01 2018-12-31 0001363829 esgr:StandardPoorsFitchAAARatingMemberMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:CorporateDebtSecuritiesMember 2018-12-31 0001363829 us-gaap:ExternalCreditRatingNonInvestmentGradeMember 2018-12-31 0001363829 esgr:StandardPoorsFitchBBBRatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember esgr:OtherGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:USGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchAARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:MunicipalBondsMember 2018-12-31 0001363829 esgr:NotRatedMember us-gaap:CommercialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:MarketableSecuritiesMember esgr:PortfolioConcentrationRiskMember esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember 2018-01-01 2018-12-31 0001363829 esgr:MarketableSecuritiesMember esgr:PortfolioConcentrationRiskMember us-gaap:MunicipalBondsMember esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember 2018-01-01 2018-12-31 0001363829 esgr:StandardPoorsFitchARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:NotRatedMember us-gaap:AssetBackedSecuritiesMember 2018-12-31 0001363829 us-gaap:ExternalCreditRatingNonInvestmentGradeMember esgr:OtherGovernmentAgenciesDebtSecuritiesMember 2018-12-31 0001363829 esgr:StandardPoorsFitchARatingMember us-gaap:ExternalCreditRatingInvestmentGradeMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2018-12-31 0001363829 esgr:MarketableSecuritiesMember esgr:PortfolioConcentrationRiskMember us-gaap:AssetBackedSecuritiesMember esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember 2018-01-01 2018-12-31 0001363829 esgr:MarketableSecuritiesMember esgr:PortfolioConcentrationRiskMember esgr:OtherGovernmentAgenciesDebtSecuritiesMember esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember 2018-01-01 2018-12-31 0001363829 esgr:NotRatedMember esgr:TradingandAvailableforSaleSecuritiesMember esgr:CreditRatingConcentrationRiskMember 2018-01-01 2018-12-31 0001363829 us-gaap:AvailableforsaleSecuritiesMember 2018-12-31 0001363829 esgr:AmTrustFinancialServicesInc.Member 2018-12-31 0001363829 esgr:PublicEquityFundsMember 2018-12-31 0001363829 us-gaap:PrivateEquityFundsMember 2018-12-31 0001363829 esgr:PublicEquityFundsMember 2017-12-31 0001363829 us-gaap:PrivateEquityFundsMember 2017-12-31 0001363829 esgr:PrivateCreditFundsMember 2018-12-31 0001363829 esgr:CLOEquityFundsMember 2017-12-31 0001363829 esgr:CLOEquityMember 2018-12-31 0001363829 us-gaap:EquityFundsMember 2017-12-31 0001363829 esgr:CLOEquityMember 2017-12-31 0001363829 us-gaap:FixedIncomeFundsMember 2017-12-31 0001363829 esgr:CLOEquityFundsMember 2018-12-31 0001363829 us-gaap:OtherLongTermInvestmentsMember 2018-12-31 0001363829 us-gaap:HedgeFundsMember 2018-12-31 0001363829 us-gaap:FixedIncomeFundsMember 2018-12-31 0001363829 us-gaap:OtherLongTermInvestmentsMember 2017-12-31 0001363829 us-gaap:HedgeFundsMember 2017-12-31 0001363829 us-gaap:EquityFundsMember 2018-12-31 0001363829 esgr:PrivateCreditFundsMember 2017-12-31 0001363829 esgr:KaylaReHoldingsLtdMember 2018-12-31 0001363829 esgr:CLOEquityFundTwoMember 2018-12-31 0001363829 esgr:KaylaReHoldingsLtdMember srt:AffiliatedEntityMember 2018-01-01 2018-12-31 0001363829 esgr:FixedIncomeFundTwoMember us-gaap:FixedIncomeFundsMember 2018-12-31 0001363829 us-gaap:HedgeFundsEquityMember 2018-01-01 2018-12-31 0001363829 esgr:FixedIncomeFundOneMember us-gaap:FixedIncomeFundsMember 2018-12-31 0001363829 esgr:HedgeFundsFixedIncomeMember 2018-12-31 0001363829 esgr:LifeSettlementsMember 2018-01-01 2018-12-31 0001363829 esgr:LifeSettlementsMember 2016-01-01 2016-12-31 0001363829 esgr:LifeSettlementsMember 2017-01-01 2017-12-31 0001363829 esgr:CitcoIIILimitedMember 2017-12-31 0001363829 esgr:ClearSpringMember 2018-12-31 0001363829 esgr:MonumentMember 2017-12-31 0001363829 esgr:EnhanzedReMember 2017-12-31 0001363829 esgr:EnhanzedReMember 2018-12-31 0001363829 esgr:ClearSpringMember 2017-12-31 0001363829 esgr:KaylaReHoldingsLtdMember 2017-12-31 0001363829 esgr:MonumentMember 2018-12-31 0001363829 esgr:KaylaReHoldingsLtdMember 2018-12-31 0001363829 esgr:CitcoIIILimitedMember 2018-12-31 0001363829 us-gaap:EquityMethodInvestmentsMember 2018-12-31 0001363829 esgr:FundsHeldDirectlyManagedVariableReturnOptionMember 2017-12-31 0001363829 esgr:FundsHeldDirectlyManagedFairValueOptionMember 2017-12-31 0001363829 esgr:FundsHeldDirectlyManagedVariableReturnOptionMember 2018-12-31 0001363829 esgr:FundsHeldDirectlyManagedFairValueOptionMember 2018-12-31 0001363829 us-gaap:EquitySecuritiesMember 2016-01-01 2016-12-31 0001363829 esgr:EquitiesandOtherInvestmentsMember 2016-01-01 2016-12-31 0001363829 esgr:LifeSettlementsandOtherMember 2017-01-01 2017-12-31 0001363829 esgr:LifeSettlementsandOtherMember 2016-01-01 2016-12-31 0001363829 us-gaap:EquitySecuritiesMember 2018-01-01 2018-12-31 0001363829 esgr:FundsHeldMember 2016-01-01 2016-12-31 0001363829 esgr:FundsHeldMember 2017-01-01 2017-12-31 0001363829 us-gaap:FixedMaturitiesMember 2017-01-01 2017-12-31 0001363829 esgr:FundsHeldDirectlyManagedMember 2017-01-01 2017-12-31 0001363829 us-gaap:OtherInvestmentsMember 2018-01-01 2018-12-31 0001363829 esgr:FundsHeldMember 2018-01-01 2018-12-31 0001363829 esgr:FixedMaturitiesandCashandCashEquivalentsMember 2018-01-01 2018-12-31 0001363829 esgr:ShortTermInvestmentsAndCashEquivalentsMember 2018-01-01 2018-12-31 0001363829 us-gaap:OtherInvestmentsMember 2016-01-01 2016-12-31 0001363829 esgr:EquitiesandOtherInvestmentsMember 2018-01-01 2018-12-31 0001363829 esgr:EquitiesandOtherInvestmentsMember 2017-01-01 2017-12-31 0001363829 us-gaap:FixedMaturitiesMember 2016-01-01 2016-12-31 0001363829 esgr:FundsHeldDirectlyManagedMember 2018-01-01 2018-12-31 0001363829 esgr:FundsHeldDirectlyManagedMember 2016-01-01 2016-12-31 0001363829 us-gaap:FixedMaturitiesMember 2018-01-01 2018-12-31 0001363829 esgr:ShortTermInvestmentsAndCashEquivalentsMember 2016-01-01 2016-12-31 0001363829 esgr:FixedMaturitiesandCashandCashEquivalentsMember 2017-01-01 2017-12-31 0001363829 us-gaap:OtherInvestmentsMember 2017-01-01 2017-12-31 0001363829 esgr:ShortTermInvestmentsAndCashEquivalentsMember 2017-01-01 2017-12-31 0001363829 esgr:FixedMaturitiesandCashandCashEquivalentsMember 2016-01-01 2016-12-31 0001363829 esgr:LifeSettlementsandOtherMember 2018-01-01 2018-12-31 0001363829 us-gaap:EquitySecuritiesMember 2017-01-01 2017-12-31 0001363829 us-gaap:DebtSecuritiesMember 2017-01-01 2017-12-31 0001363829 us-gaap:DebtSecuritiesMember 2016-01-01 2016-12-31 0001363829 us-gaap:DebtSecuritiesMember 2018-01-01 2018-12-31 0001363829 us-gaap:AssetPledgedAsCollateralMember 2017-12-31 0001363829 us-gaap:AssetPledgedAsCollateralMember 2018-12-31 0001363829 us-gaap:StockOptionMember us-gaap:NondesignatedMember 2017-12-31 0001363829 us-gaap:NetInvestmentHedgingMember 2018-12-31 0001363829 currency:CAD us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2018-12-31 0001363829 currency:AUD us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2017-12-31 0001363829 currency:CAD us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2017-12-31 0001363829 us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2017-12-31 0001363829 currency:EUR us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2018-12-31 0001363829 us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2018-12-31 0001363829 currency:EUR us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2017-12-31 0001363829 currency:AUD us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2018-12-31 0001363829 us-gaap:NetInvestmentHedgingMember 2017-12-31 0001363829 us-gaap:ForeignExchangeForwardMember us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember esgr:LagunaMember 2017-12-29 2017-12-29 0001363829 us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2018-01-01 2018-12-31 0001363829 us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2016-01-01 2016-12-31 0001363829 currency:EUR us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2016-01-01 2016-12-31 0001363829 currency:CAD us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2016-01-01 2016-12-31 0001363829 currency:EUR us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2017-01-01 2017-12-31 0001363829 currency:CAD us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2018-01-01 2018-12-31 0001363829 currency:AUD us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2018-01-01 2018-12-31 0001363829 us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2017-01-01 2017-12-31 0001363829 currency:AUD us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2016-01-01 2016-12-31 0001363829 currency:EUR us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2018-01-01 2018-12-31 0001363829 currency:CAD us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2017-01-01 2017-12-31 0001363829 currency:AUD us-gaap:ForeignExchangeForwardMember us-gaap:DesignatedAsHedgingInstrumentMember 2017-01-01 2017-12-31 0001363829 us-gaap:NetInvestmentHedgingMember 2017-01-01 2017-12-31 0001363829 us-gaap:NetInvestmentHedgingMember 2018-01-01 2018-12-31 0001363829 us-gaap:NetInvestmentHedgingMember 2016-01-01 2016-12-31 0001363829 us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2017-12-31 0001363829 us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2017-01-01 2017-12-31 0001363829 currency:EUR us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2017-12-31 0001363829 currency:AUD us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2017-12-31 0001363829 currency:GBP us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2017-01-01 2017-12-31 0001363829 currency:GBP us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2017-12-31 0001363829 currency:AUD us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2017-01-01 2017-12-31 0001363829 currency:EUR us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2017-01-01 2017-12-31 0001363829 currency:CAD us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2018-01-01 2018-12-31 0001363829 currency:GBP us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2018-01-01 2018-12-31 0001363829 currency:AUD us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2018-12-31 0001363829 currency:AUD us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2018-01-01 2018-12-31 0001363829 us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2018-12-31 0001363829 currency:EUR us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2018-12-31 0001363829 currency:GBP us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2018-12-31 0001363829 us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2018-01-01 2018-12-31 0001363829 currency:CAD us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2018-12-31 0001363829 currency:EUR us-gaap:ForeignExchangeForwardMember us-gaap:NondesignatedMember 2018-01-01 2018-12-31 0001363829 us-gaap:StockOptionMember us-gaap:NondesignatedMember 2016-01-01 2016-12-31 0001363829 us-gaap:StockOptionMember us-gaap:NondesignatedMember 2018-01-01 2018-12-31 0001363829 us-gaap:StockOptionMember us-gaap:NondesignatedMember 2016-12-31 0001363829 us-gaap:StockOptionMember us-gaap:NondesignatedMember 2018-12-31 0001363829 us-gaap:ReinsurerConcentrationRiskMember 2016-12-31 0001363829 esgr:TopTenReinsurersRatedAMinusOrHigherMember us-gaap:ReinsurerConcentrationRiskMember 2016-12-31 0001363829 esgr:NonLifeRunOffandStarStoneSegmentMember 2018-01-01 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:AtriumSegmentMember 2018-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:StarStoneSegmentMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:StarStoneSegmentMember 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:AtriumSegmentMember 2017-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember 2017-12-31 0001363829 esgr:TopTenReinsurersFourNonRatedReinsurersMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 esgr:TopTenReinsurersRatedAMinusOrHigherMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 esgr:TopTenReinsurersFourNonRatedReinsurersMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 esgr:HannoverRuckSEMember us-gaap:ReinsurerConcentrationRiskMember us-gaap:EquityMethodInvesteeMember 2017-12-31 0001363829 esgr:TopTenReinsurersRatedAMinusOrHigherMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 esgr:HannoverRuckSEMember us-gaap:ReinsurerConcentrationRiskMember us-gaap:EquityMethodInvesteeMember 2018-12-31 0001363829 esgr:LloydsSyndicateMember us-gaap:ReinsurerConcentrationRiskMember us-gaap:EquityMethodInvesteeMember 2017-12-31 0001363829 esgr:LloydsSyndicateMember us-gaap:ReinsurerConcentrationRiskMember us-gaap:EquityMethodInvesteeMember 2018-12-31 0001363829 esgr:TopTenReinsurersMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 esgr:TopTenReinsurersMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:AtriumSegmentMember 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:AtriumSegmentMember 2017-12-31 0001363829 esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-01-01 2018-12-31 0001363829 esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:AtriumSegmentMember 2018-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:StarStoneSegmentMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-01-01 2017-12-31 0001363829 esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-01-01 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:AtriumSegmentMember 2017-12-31 0001363829 esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:StarStoneSegmentMember 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:AtriumSegmentMember 2018-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:StarStoneSegmentMember 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:AtriumSegmentMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:StarStoneSegmentMember 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-01-01 2018-12-31 0001363829 esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-01-01 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:AtriumSegmentMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:StarStoneSegmentMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:StarStoneSegmentMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:AtriumSegmentMember 2017-12-31 0001363829 esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-01-01 2018-12-31 0001363829 us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-01-01 2017-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-12-31 0001363829 esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2017-01-01 2017-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:StarStoneSegmentMember 2017-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember esgr:TopTenReinsurersMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember us-gaap:ReinsuranceRecoverableMember us-gaap:ReinsurerConcentrationRiskMember esgr:StarStoneSegmentMember 2018-12-31 0001363829 esgr:ReinsurersRatedBelowAMinusMember us-gaap:CededCreditRiskUnsecuredMember 2017-12-31 0001363829 esgr:ReinsurersRatedAMinusOrAboveMember 2018-12-31 0001363829 esgr:ReinsurersRatedBelowAMinusMember us-gaap:CededCreditRiskUnsecuredMember 2018-12-31 0001363829 esgr:ReinsurersRatedAMinusOrAboveMember 2017-12-31 0001363829 esgr:ReinsurersRatedBelowAMinusMember us-gaap:CededCreditRiskSecuredMember 2018-12-31 0001363829 esgr:ReinsurersRatedBelowAMinusMember us-gaap:CededCreditRiskSecuredMember 2017-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember esgr:StarStoneSegmentMember 2017-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember esgr:StarStoneSegmentMember 2018-12-31 0001363829 esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:StarStoneSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:AtriumSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:AtriumSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:StarStoneSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:CorporateAndReconcilingItemsMember 2018-01-01 2018-12-31 0001363829 us-gaap:OperatingSegmentsMember esgr:StarStoneSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:AtriumSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:StarStoneSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:LiabilityClaimsandClaimsAdjustmentExpenseMember esgr:SegmentConcentrationRiskMember esgr:AtriumSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:MarineAviationTransitandConstructionDefectMember esgr:LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseMember us-gaap:ProductConcentrationRiskMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:MotorMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:PropertyMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:ShortdurationInsuranceContractsAccidentYears19952005Member esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:ShortdurationInsuranceContractsAccidentYears20102014Member esgr:NonlifeRunoffSegmentMember 2018-01-01 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:AsbestosExposureMember esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:PropertyMember esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:MotorMember esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:NonlifeRunoffSegmentMember 2017-01-01 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:AsbestosExposureSixCommutationsMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:ShortdurationInsuranceContractsAccidentYears19912001Member esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:AsbestosExposureMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:MotorMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:PropertyMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:NonlifeRunoffSegmentMember 2016-01-01 2016-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:MotorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:PropertyMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:AsbestosExposureMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MarineAviationandTransitExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:MotorMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ConstructionDefectExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:PropertyMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:ProfessionalIndemnityDirectorsOfficersMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 us-gaap:OtherShortdurationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:GeneralCasualtyInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2011-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2010-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2009-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312009Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2010-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2011-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2011-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2011-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2011-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2011-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2012-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2013-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2014-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2015-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:AsbestosExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:EnvironmentalExposureMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2018-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member esgr:ShortdurationInsuranceContractsAccidentYear2008AndPriorMember esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member esgr:NonlifeRunoffSegmentMember 2016-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member esgr:NonlifeRunoffSegmentMember 2017-12-31 0001363829 esgr:WorkersCompensationInsuranceProductLineMember esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member us-gaap:ShortdurationInsuranceContractsAccidentYear2009Member esgr:NonlifeRunoffSegmentMember