false--12-31trueFY2019false0001363829BermudaEnstar Group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
0001363829
2019-01-01
2019-12-31
0001363829
esgr:BorgWarnerMorseTECMember
2019-01-01
2019-12-31
0001363829
esgr:MaidenReNorthAmericaMember
2019-01-01
2019-12-31
0001363829
esgr:KaylaReHoldingsLtdMember
2019-01-01
2019-12-31
0001363829
esgr:VotingCommonStockMember
2020-02-24
0001363829
us-gaap:NonvotingCommonStockMember
2020-02-24
0001363829
2019-06-30
0001363829
us-gaap:CommonStockMember
2019-01-01
2019-12-31
0001363829
us-gaap:SeriesEPreferredStockMember
2019-01-01
2019-12-31
0001363829
us-gaap:SeriesDPreferredStockMember
2019-01-01
2019-12-31
0001363829
esgr:MunichReMember
srt:ScenarioForecastMember
2020-01-01
2020-06-30
0001363829
2018-12-31
0001363829
2019-12-31
0001363829
esgr:VotingCommonStockMember
2019-12-31
0001363829
esgr:CommonClassEMember
2019-12-31
0001363829
esgr:VotingCommonStockMember
2018-12-31
0001363829
us-gaap:FixedMaturitiesMember
2019-12-31
0001363829
us-gaap:CommonClassCMember
2018-12-31
0001363829
us-gaap:SeriesCPreferredStockMember
2018-12-31
0001363829
us-gaap:ShortTermInvestmentsMember
2019-12-31
0001363829
us-gaap:CommonClassCMember
2019-12-31
0001363829
us-gaap:FixedMaturitiesMember
2018-12-31
0001363829
us-gaap:ShortTermInvestmentsMember
2018-12-31
0001363829
us-gaap:SeriesDPreferredStockMember
2018-12-31
0001363829
us-gaap:SeriesEPreferredStockMember
2018-12-31
0001363829
us-gaap:SeriesDPreferredStockMember
2019-12-31
0001363829
us-gaap:SeriesCPreferredStockMember
2019-12-31
0001363829
esgr:CommonClassEMember
2018-12-31
0001363829
us-gaap:SeriesEPreferredStockMember
2019-12-31
0001363829
2017-01-01
2017-12-31
0001363829
2018-01-01
2018-12-31
0001363829
us-gaap:AdditionalPaidInCapitalMember
2019-12-31
0001363829
us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember
2017-12-31
0001363829
esgr:VotingCommonStockMember
us-gaap:CommonStockMember
2017-01-01
2017-12-31
0001363829
us-gaap:SeriesEPreferredStockMember
us-gaap:PreferredStockMember
2016-12-31
0001363829
us-gaap:SeriesDPreferredStockMember
us-gaap:PreferredStockMember
2017-12-31
0001363829
us-gaap:AdditionalPaidInCapitalMember
2019-01-01
2019-12-31
0001363829
us-gaap:NoncontrollingInterestMember
2017-12-31
0001363829
us-gaap:NoncontrollingInterestMember
2019-12-31
0001363829
esgr:CommonClassEMember
us-gaap:CommonStockMember
2017-12-31
0001363829
us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember
2018-01-01
2018-12-31
0001363829
us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember
2018-12-31
0001363829
esgr:VotingCommonStockMember
us-gaap:CommonStockMember
2017-12-31
0001363829
us-gaap:SeriesCPreferredStockMember
us-gaap:PreferredStockMember
2018-12-31
0001363829
us-gaap:AccumulatedTranslationAdjustmentMember
2019-01-01
2019-12-31
0001363829
us-gaap:RetainedEarningsMember
2018-01-01
2018-12-31
0001363829
us-gaap:AdditionalPaidInCapitalMember
2018-01-01
2018-12-31
0001363829
us-gaap:NoncontrollingInterestMember
2016-12-31
0001363829
us-gaap:TreasuryStockMember
2019-12-31
0001363829
us-gaap:AccumulatedOtherComprehensiveIncomeMember
2018-12-31
0001363829
us-gaap:AccumulatedOtherComprehensiveIncomeMember
2017-12-31
0001363829
us-gaap:NoncontrollingInterestMember
2017-01-01
2017-12-31
0001363829
esgr:VotingCommonStockMember
us-gaap:CommonStockMember
2019-12-31
0001363829
us-gaap:SeriesDPreferredStockMember
us-gaap:PreferredStockMember
2018-12-31
0001363829
us-gaap:SeriesEPreferredStockMember
us-gaap:PreferredStockMember
2019-01-01
2019-12-31
0001363829
esgr:CommonClassEMember
us-gaap:CommonStockMember
2017-01-01
2017-12-31
0001363829
us-gaap:SeriesDPreferredStockMember
us-gaap:PreferredStockMember
2016-12-31
0001363829
esgr:VotingCommonStockMember
us-gaap:CommonStockMember
2018-01-01
2018-12-31
0001363829
us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember
2018-01-01
2018-12-31
0001363829
us-gaap:AdditionalPaidInCapitalMember
2018-12-31
0001363829
us-gaap:CommonClassCMember
us-gaap:CommonStockMember
2018-12-31
0001363829
us-gaap:SeriesEPreferredStockMember
us-gaap:PreferredStockMember
2017-12-31
0001363829
us-gaap:SeriesCPreferredStockMember
us-gaap:PreferredStockMember
2017-12-31
0001363829
esgr:VotingCommonStockMember
us-gaap:CommonStockMember
2018-12-31
0001363829
us-gaap:RetainedEarningsMember
2018-12-31
0001363829
us-gaap:NoncontrollingInterestMember
2019-01-01
2019-12-31
0001363829
us-gaap:AdditionalPaidInCapitalMember
2017-01-01
2017-12-31
0001363829
us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember
2019-01-01
2019-12-31
0001363829
us-gaap:TreasuryStockMember
2017-12-31
0001363829
us-gaap:AdditionalPaidInCapitalMember
2017-12-31
0001363829
us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember
2017-01-01
2017-12-31
0001363829
us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember
2019-01-01
2019-12-31
0001363829
us-gaap:RetainedEarningsMember
2019-01-01
2019-12-31
0001363829
us-gaap:AccumulatedTranslationAdjustmentMember
2018-12-31
0001363829
us-gaap:RetainedEarningsMember
2017-12-31
0001363829
us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember
2016-12-31
0001363829
us-gaap:SeriesEPreferredStockMember
us-gaap:PreferredStockMember
2018-12-31
0001363829
us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember
2018-12-31
0001363829
us-gaap:RetainedEarningsMember
2019-12-31
0001363829
us-gaap:RetainedEarningsMember
2019-01-01
0001363829
esgr:CommonClassEMember
us-gaap:CommonStockMember
2019-12-31
0001363829
us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember
2019-12-31
0001363829
us-gaap:SeriesDPreferredStockMember
us-gaap:PreferredStockMember
2019-12-31
0001363829
us-gaap:SeriesDPreferredStockMember
us-gaap:PreferredStockMember
2018-01-01
2018-12-31
0001363829
us-gaap:SeriesCPreferredStockMember
us-gaap:PreferredStockMember
2019-12-31
0001363829
us-gaap:NoncontrollingInterestMember
2018-01-01
2018-12-31
0001363829
us-gaap:CommonClassCMember
us-gaap:CommonStockMember
2019-12-31
0001363829
us-gaap:AccumulatedOtherComprehensiveIncomeMember
2016-12-31
0001363829
us-gaap:SeriesEPreferredStockMember
us-gaap:PreferredStockMember
2019-12-31
0001363829
us-gaap:SeriesDPreferredStockMember
us-gaap:PreferredStockMember
2017-01-01
2017-12-31
0001363829
us-gaap:AccumulatedTranslationAdjustmentMember
2018-01-01
2018-12-31
0001363829
us-gaap:RetainedEarningsMember
2017-01-01
2017-12-31
0001363829
us-gaap:RetainedEarningsMember
2018-01-01
0001363829
esgr:VotingCommonStockMember
us-gaap:CommonStockMember
2016-12-31
0001363829
us-gaap:AccumulatedTranslationAdjustmentMember
2017-01-01
2017-12-31
0001363829
us-gaap:AdditionalPaidInCapitalMember
2016-12-31
0001363829
esgr:VotingCommonStockMember
us-gaap:CommonStockMember
2019-01-01
2019-12-31
0001363829
us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember
2017-12-31
0001363829
us-gaap:SeriesDPreferredStockMember
us-gaap:PreferredStockMember
2019-01-01
2019-12-31
0001363829
us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember
2019-12-31
0001363829
esgr:CommonClassEMember
us-gaap:CommonStockMember
2018-01-01
2018-12-31
0001363829
us-gaap:SeriesEPreferredStockMember
us-gaap:PreferredStockMember
2017-01-01
2017-12-31
0001363829
us-gaap:CommonClassCMember
us-gaap:CommonStockMember
2019-01-01
2019-12-31
0001363829
us-gaap:AccumulatedOtherComprehensiveIncomeMember
2019-12-31
0001363829
us-gaap:AccumulatedTranslationAdjustmentMember
2017-12-31
0001363829
us-gaap:CommonClassCMember
us-gaap:CommonStockMember
2017-01-01
2017-12-31
0001363829
esgr:CommonClassEMember
us-gaap:CommonStockMember
2018-12-31
0001363829
us-gaap:CommonClassCMember
us-gaap:CommonStockMember
2017-12-31
0001363829
us-gaap:RetainedEarningsMember
2017-01-01
0001363829
us-gaap:SeriesEPreferredStockMember
us-gaap:PreferredStockMember
2018-01-01
2018-12-31
0001363829
us-gaap:AccumulatedTranslationAdjustmentMember
2016-12-31
0001363829
us-gaap:TreasuryStockMember
2018-12-31
0001363829
us-gaap:CommonClassCMember
us-gaap:CommonStockMember
2018-01-01
2018-12-31
0001363829
us-gaap:AccumulatedTranslationAdjustmentMember
2019-12-31
0001363829
esgr:CommonClassEMember
us-gaap:CommonStockMember
2016-12-31
0001363829
us-gaap:RetainedEarningsMember
2016-12-31
0001363829
esgr:CommonClassEMember
us-gaap:CommonStockMember
2019-01-01
2019-12-31
0001363829
us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember
2017-01-01
2017-12-31
0001363829
us-gaap:NoncontrollingInterestMember
2018-12-31
0001363829
us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember
2016-12-31
0001363829
us-gaap:CommonClassCMember
us-gaap:CommonStockMember
2016-12-31
0001363829
2017-12-31
0001363829
2016-12-31
0001363829
esgr:AtriumSegmentMember
2019-01-01
2019-12-31
0001363829
us-gaap:AccountingStandardsUpdate201602Member
2019-01-01
0001363829
us-gaap:AccountingStandardsUpdate201613Member
us-gaap:RetainedEarningsMember
us-gaap:SubsequentEventMember
2020-01-01
0001363829
us-gaap:AccountingStandardsUpdate201613Member
us-gaap:SubsequentEventMember
2020-01-01
0001363829
esgr:BorgWarnerMorseTECMember
2019-10-30
0001363829
srt:ProFormaMember
esgr:BorgWarnerMorseTECMember
esgr:NetIncomeLossAdjustmentMember
2019-01-01
2019-12-31
0001363829
srt:ProFormaMember
2019-01-01
2019-12-31
0001363829
esgr:BorgWarnerMorseTECMember
2018-01-01
2018-12-31
0001363829
srt:ProFormaMember
2018-01-01
2018-12-31
0001363829
esgr:MaidenReNorthAmericaMember
2018-12-27
0001363829
esgr:MaidenReNorthAmericaMember
2018-12-27
2018-12-27
0001363829
esgr:MaidenReNorthAmericaMember
2018-01-01
2018-12-31
0001363829
esgr:KaylaReHoldingsLtdMember
2018-05-14
2018-05-14
0001363829
esgr:KaylaReHoldingsLtdMember
2018-01-01
2018-06-30
0001363829
esgr:KaylaReHoldingsLtdMember
2018-05-13
0001363829
esgr:KaylaReHoldingsLtdMember
2018-05-14
0001363829
esgr:KaylaReHoldingsLtdMember
us-gaap:EstimateOfFairValueFairValueDisclosureMember
2018-05-14
0001363829
esgr:KaylaReHoldingsLtdMember
us-gaap:CarryingReportedAmountFairValueDisclosureMember
2018-05-14
0001363829
esgr:KaylaReHoldingsLtdMember
esgr:FairValueAdjustmentsMember
2018-05-14
0001363829
esgr:KaylaReHoldingsLtdMember
2018-01-01
2018-12-31
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:BorgWarnerMorseTECMember
2019-10-30
2019-10-30
0001363829
esgr:AXAGroupMember
srt:ScenarioForecastMember
2020-01-01
2020-06-30
0001363829
esgr:ZurichMember
2019-10-01
2019-10-01
0001363829
esgr:ZurichMember
2019-10-01
0001363829
esgr:EnhanzedReMember
esgr:ZurichMember
2019-01-01
2019-12-31
0001363829
esgr:MaidenReBermudaMember
srt:MaximumMember
2019-08-05
2019-08-05
0001363829
esgr:MaidenReBermudaMember
2019-08-05
2019-08-05
0001363829
esgr:MaidenReBermudaMember
srt:MinimumMember
2019-08-05
2019-08-05
0001363829
esgr:MaidenReBermudaMember
2019-08-05
0001363829
esgr:AmerisureMember
2019-04-11
2019-04-11
0001363829
esgr:AmerisureMember
2019-04-11
0001363829
esgr:AmTrustRITCMember
2019-02-14
2019-02-14
0001363829
esgr:AmTrustRITCMember
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: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
0001363829
esgr:RSAInsuranceGroupPLCMember
2017-02-07
2017-02-07
0001363829
esgr:QBEInsuranceGroupLimitedMember
2017-01-11
0001363829
esgr:QBEInsuranceGroupLimitedMember
2017-01-11
2017-01-11
0001363829
us-gaap:DiscontinuedOperationsDisposedOfBySaleMember
esgr:PavoniaMember
2017-01-01
2017-12-31
0001363829
us-gaap:DiscontinuedOperationsHeldforsaleMember
esgr:PavoniaLifeInsuranceCompanyOfNewYorkMember
2019-12-31
0001363829
us-gaap:DiscontinuedOperationsHeldforsaleMember
esgr:PavoniaMember
2017-12-29
0001363829
us-gaap:DiscontinuedOperationsDisposedOfBySaleMember
esgr:PavoniaMember
2017-12-29
0001363829
us-gaap:DiscontinuedOperationsHeldforsaleMember
esgr:PavoniaLifeInsuranceCompanyOfNewYorkMember
2018-12-31
0001363829
us-gaap:DiscontinuedOperationsHeldforsaleMember
esgr:PavoniaMember
2017-01-01
2017-12-31
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:OtherEquityMethodInvestmentsMember
2019-12-31
0001363829
esgr:OtherEquityMethodInvestmentsMember
2018-12-31
0001363829
us-gaap:AvailableforsaleSecuritiesMember
2018-12-31
0001363829
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
us-gaap:FixedMaturitiesMember
2019-12-31
0001363829
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2019-12-31
0001363829
us-gaap:CommercialMortgageBackedSecuritiesMember
us-gaap:FixedMaturitiesMember
2019-12-31
0001363829
us-gaap:CorporateDebtSecuritiesMember
2019-12-31
0001363829
us-gaap:AssetBackedSecuritiesMember
us-gaap:FixedMaturitiesMember
2019-12-31
0001363829
us-gaap:AssetBackedSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2019-12-31
0001363829
us-gaap:ResidentialMortgageBackedSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2019-12-31
0001363829
us-gaap:CommercialMortgageBackedSecuritiesMember
2019-12-31
0001363829
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2019-12-31
0001363829
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2019-12-31
0001363829
us-gaap:CorporateDebtSecuritiesMember
us-gaap:FixedMaturitiesMember
2019-12-31
0001363829
us-gaap:CorporateDebtSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2019-12-31
0001363829
us-gaap:AssetBackedSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2019-12-31
0001363829
us-gaap:CommercialMortgageBackedSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2019-12-31
0001363829
us-gaap:MunicipalBondsMember
us-gaap:ShortTermInvestmentsMember
2019-12-31
0001363829
us-gaap:CorporateDebtSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2019-12-31
0001363829
us-gaap:ResidentialMortgageBackedSecuritiesMember
us-gaap:FixedMaturitiesMember
2019-12-31
0001363829
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2019-12-31
0001363829
us-gaap:MunicipalBondsMember
us-gaap:FixedMaturitiesMember
2019-12-31
0001363829
us-gaap:MunicipalBondsMember
esgr:FundsHeldDirectlyManagedMember
2019-12-31
0001363829
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
us-gaap:FixedMaturitiesMember
2019-12-31
0001363829
us-gaap:AssetBackedSecuritiesMember
2019-12-31
0001363829
us-gaap:CommercialMortgageBackedSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2019-12-31
0001363829
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:FundsHeldDirectlyManagedMember
2019-12-31
0001363829
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2019-12-31
0001363829
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
us-gaap:FixedMaturitiesMember
2019-12-31
0001363829
us-gaap:ResidentialMortgageBackedSecuritiesMember
2019-12-31
0001363829
us-gaap:MunicipalBondsMember
2019-12-31
0001363829
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2019-12-31
0001363829
us-gaap:ResidentialMortgageBackedSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2019-12-31
0001363829
us-gaap:ResidentialMortgageBackedSecuritiesMember
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
us-gaap:CorporateDebtSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2018-12-31
0001363829
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
us-gaap:FixedMaturitiesMember
2018-12-31
0001363829
us-gaap:CorporateDebtSecuritiesMember
us-gaap:FixedMaturitiesMember
2018-12-31
0001363829
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2018-12-31
0001363829
esgr:FundsHeldDirectlyManagedMember
2018-12-31
0001363829
us-gaap:CommercialMortgageBackedSecuritiesMember
us-gaap:FixedMaturitiesMember
2018-12-31
0001363829
us-gaap:ResidentialMortgageBackedSecuritiesMember
2018-12-31
0001363829
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2018-12-31
0001363829
us-gaap:MunicipalBondsMember
2018-12-31
0001363829
us-gaap:AssetBackedSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2018-12-31
0001363829
us-gaap:CommercialMortgageBackedSecuritiesMember
2018-12-31
0001363829
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2018-12-31
0001363829
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
us-gaap:FixedMaturitiesMember
2018-12-31
0001363829
us-gaap:AssetBackedSecuritiesMember
us-gaap:FixedMaturitiesMember
2018-12-31
0001363829
us-gaap:CorporateDebtSecuritiesMember
2018-12-31
0001363829
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
2018-12-31
0001363829
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
us-gaap:FixedMaturitiesMember
2018-12-31
0001363829
us-gaap:AssetBackedSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2018-12-31
0001363829
us-gaap:MunicipalBondsMember
esgr:FundsHeldDirectlyManagedMember
2018-12-31
0001363829
us-gaap:ResidentialMortgageBackedSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2018-12-31
0001363829
us-gaap:MunicipalBondsMember
us-gaap:FixedMaturitiesMember
2018-12-31
0001363829
us-gaap:CorporateDebtSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2018-12-31
0001363829
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
2018-12-31
0001363829
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
us-gaap:ShortTermInvestmentsMember
2018-12-31
0001363829
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2018-12-31
0001363829
us-gaap:ResidentialMortgageBackedSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2018-12-31
0001363829
us-gaap:CommercialMortgageBackedSecuritiesMember
esgr:FundsHeldDirectlyManagedMember
2018-12-31
0001363829
us-gaap:AssetBackedSecuritiesMember
2018-12-31
0001363829
us-gaap:MunicipalBondsMember
us-gaap:ShortTermInvestmentsMember
2018-12-31
0001363829
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
2018-12-31
0001363829
esgr:SeniorSecuredDebtSecuritiesMember
2018-12-31
0001363829
esgr:SeniorSecuredDebtSecuritiesMember
2019-12-31
0001363829
esgr:ShortTermInvestmentsAndFixedMaturitiesMember
2019-12-31
0001363829
us-gaap:ResidentialMortgageBackedSecuritiesMember
esgr:ShortTermInvestmentsAndFixedMaturitiesMember
2019-12-31
0001363829
us-gaap:CommercialMortgageBackedSecuritiesMember
esgr:ShortTermInvestmentsAndFixedMaturitiesMember
2019-12-31
0001363829
us-gaap:AssetBackedSecuritiesMember
esgr:ShortTermInvestmentsAndFixedMaturitiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchBBBRatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:AssetBackedSecuritiesMember
2019-12-31
0001363829
esgr:NotRatedMember
us-gaap:AssetBackedSecuritiesMember
2019-12-31
0001363829
us-gaap:ExternalCreditRatingNonInvestmentGradeMember
2019-12-31
0001363829
esgr:MarketableSecuritiesMember
esgr:PortfolioConcentrationRiskMember
us-gaap:CommercialMortgageBackedSecuritiesMember
esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember
2019-01-01
2019-12-31
0001363829
esgr:StandardPoorsFitchARatingMember
esgr:TradingandAvailableforSaleSecuritiesMember
esgr:CreditRatingConcentrationRiskMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
2019-01-01
2019-12-31
0001363829
esgr:StandardPoorsFitchAAARatingMemberMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:MunicipalBondsMember
2019-12-31
0001363829
us-gaap:ExternalCreditRatingNonInvestmentGradeMember
us-gaap:CorporateDebtSecuritiesMember
2019-12-31
0001363829
us-gaap:ExternalCreditRatingNonInvestmentGradeMember
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:CorporateDebtSecuritiesMember
2019-12-31
0001363829
esgr:NotRatedMember
us-gaap:MunicipalBondsMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAAARatingMemberMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
2019-12-31
0001363829
esgr:StandardPoorsFitchBBBRatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:ResidentialMortgageBackedSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:CommercialMortgageBackedSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAARatingMember
esgr:TradingandAvailableforSaleSecuritiesMember
esgr:CreditRatingConcentrationRiskMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
2019-01-01
2019-12-31
0001363829
esgr:StandardPoorsFitchBBBRatingMember
esgr:TradingandAvailableforSaleSecuritiesMember
esgr:CreditRatingConcentrationRiskMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
2019-01-01
2019-12-31
0001363829
esgr:StandardPoorsFitchBBBRatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAAARatingMemberMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:ResidentialMortgageBackedSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchBBBRatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
2019-12-31
0001363829
esgr:MarketableSecuritiesMember
esgr:PortfolioConcentrationRiskMember
us-gaap:MunicipalBondsMember
esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember
2019-01-01
2019-12-31
0001363829
esgr:MarketableSecuritiesMember
esgr:PortfolioConcentrationRiskMember
us-gaap:ResidentialMortgageBackedSecuritiesMember
esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember
2019-01-01
2019-12-31
0001363829
esgr:StandardPoorsFitchAAARatingMemberMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:AssetBackedSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:NotRatedMember
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:TradingandAvailableforSaleSecuritiesMember
esgr:CreditRatingConcentrationRiskMember
us-gaap:ExternalCreditRatingNonInvestmentGradeMember
2019-01-01
2019-12-31
0001363829
esgr:MarketableSecuritiesMember
esgr:PortfolioConcentrationRiskMember
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember
2019-01-01
2019-12-31
0001363829
esgr:StandardPoorsFitchAAARatingMemberMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:CommercialMortgageBackedSecuritiesMember
2019-12-31
0001363829
esgr:NotRatedMember
2019-12-31
0001363829
esgr:StandardPoorsFitchARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchBBBRatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:MunicipalBondsMember
2019-12-31
0001363829
esgr:StandardPoorsFitchARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:MunicipalBondsMember
2019-12-31
0001363829
esgr:StandardPoorsFitchBBBRatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchBBBRatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:CommercialMortgageBackedSecuritiesMember
2019-12-31
0001363829
esgr:NotRatedMember
esgr:TradingandAvailableforSaleSecuritiesMember
esgr:CreditRatingConcentrationRiskMember
2019-01-01
2019-12-31
0001363829
esgr:StandardPoorsFitchAARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:ResidentialMortgageBackedSecuritiesMember
2019-12-31
0001363829
us-gaap:ExternalCreditRatingNonInvestmentGradeMember
us-gaap:CommercialMortgageBackedSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAAARatingMemberMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAAARatingMemberMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:CorporateDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:AssetBackedSecuritiesMember
2019-12-31
0001363829
esgr:NotRatedMember
us-gaap:CommercialMortgageBackedSecuritiesMember
2019-12-31
0001363829
us-gaap:ExternalCreditRatingNonInvestmentGradeMember
us-gaap:MunicipalBondsMember
2019-12-31
0001363829
esgr:MarketableSecuritiesMember
esgr:PortfolioConcentrationRiskMember
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember
2019-01-01
2019-12-31
0001363829
esgr:StandardPoorsFitchARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:CorporateDebtSecuritiesMember
2019-12-31
0001363829
esgr:MarketableSecuritiesMember
esgr:PortfolioConcentrationRiskMember
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember
2019-01-01
2019-12-31
0001363829
esgr:StandardPoorsFitchBBBRatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:CorporateDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:MunicipalBondsMember
2019-12-31
0001363829
esgr:NotRatedMember
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:NotRatedMember
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
us-gaap:ExternalCreditRatingNonInvestmentGradeMember
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:CommercialMortgageBackedSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAAARatingMemberMember
esgr:TradingandAvailableforSaleSecuritiesMember
esgr:CreditRatingConcentrationRiskMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
2019-01-01
2019-12-31
0001363829
esgr:MarketableSecuritiesMember
esgr:PortfolioConcentrationRiskMember
us-gaap:AssetBackedSecuritiesMember
esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember
2019-01-01
2019-12-31
0001363829
esgr:StandardPoorsFitchAARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:NotRatedMember
us-gaap:CorporateDebtSecuritiesMember
2019-12-31
0001363829
esgr:MarketableSecuritiesMember
esgr:PortfolioConcentrationRiskMember
us-gaap:CorporateDebtSecuritiesMember
esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember
2019-01-01
2019-12-31
0001363829
esgr:MarketableSecuritiesMember
esgr:PortfolioConcentrationRiskMember
esgr:TradingSecuritiesandAvailableforSaleSecuritiesMember
2019-01-01
2019-12-31
0001363829
esgr:NotRatedMember
us-gaap:ResidentialMortgageBackedSecuritiesMember
2019-12-31
0001363829
us-gaap:ExternalCreditRatingNonInvestmentGradeMember
us-gaap:ResidentialMortgageBackedSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAAARatingMemberMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:USGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchBBBRatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:AssetBackedSecuritiesMember
2019-12-31
0001363829
us-gaap:ExternalCreditRatingNonInvestmentGradeMember
esgr:UnitedKingdomGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchAAARatingMemberMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
esgr:OtherGovernmentAgenciesDebtSecuritiesMember
2019-12-31
0001363829
us-gaap:ExternalCreditRatingNonInvestmentGradeMember
us-gaap:AssetBackedSecuritiesMember
2019-12-31
0001363829
esgr:StandardPoorsFitchARatingMember
us-gaap:ExternalCreditRatingInvestmentGradeMember
us-gaap:ResidentialMortgageBackedSecuritiesMember
2019-12-31
0001363829
us-gaap:AvailableforsaleSecuritiesMember
2019-12-31
0001363829
esgr:AmTrustFinancialServicesInc.Member
2019-12-31
0001363829
esgr:PublicEquityFundsMember
2018-12-31
0001363829
us-gaap:PrivateEquityFundsMember
2019-12-31
0001363829
esgr:PublicEquityFundsMember
2019-12-31
0001363829
us-gaap:ExchangeTradedFundsMember
2019-12-31
0001363829
us-gaap:PrivateEquityFundsMember
2018-12-31
0001363829
us-gaap:ExchangeTradedFundsMember
2018-12-31
0001363829
esgr:PrivateCreditFundsMember
2019-12-31
0001363829
us-gaap:HedgeFundsMember
2018-12-31
0001363829
us-gaap:FixedIncomeFundsMember
2019-12-31
0001363829
esgr:PrivateCreditFundsMember
2018-12-31
0001363829
esgr:CLOEquityFundsMember
2019-12-31
0001363829
us-gaap:HedgeFundsMember
2019-12-31
0001363829
esgr:CLOEquityFundsMember
2018-12-31
0001363829
us-gaap:EquityFundsMember
2018-12-31
0001363829
esgr:CLOEquityMember
2019-12-31
0001363829
us-gaap:OtherLongTermInvestmentsMember
2018-12-31
0001363829
us-gaap:EquityFundsMember
2019-12-31
0001363829
us-gaap:FixedIncomeFundsMember
2018-12-31
0001363829
esgr:CLOEquityMember
2018-12-31
0001363829
us-gaap:OtherLongTermInvestmentsMember
2019-12-31
0001363829
esgr:RestrictionPeriodOneToTwoYearsMember
us-gaap:FixedIncomeFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodTwoToThreeYearsMember
2019-12-31
0001363829
esgr:RestrictionPeriodTwoToThreeYearsMember
us-gaap:HedgeFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodNotEligibleRestrictedMember
esgr:CLOEquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodMoreThanThreeYearsMember
us-gaap:EquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodLessThanOneYearMember
us-gaap:FixedIncomeFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodNotEligibleRestrictedMember
us-gaap:PrivateEquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodTwoToThreeYearsMember
us-gaap:OtherLongTermInvestmentsMember
2019-12-31
0001363829
esgr:RestrictionPeriodOneToTwoYearsMember
us-gaap:PrivateEquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodLessThanOneYearMember
esgr:CLOEquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodMoreThanThreeYearsMember
us-gaap:FixedIncomeFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodNotEligibleRestrictedMember
esgr:CLOEquityMember
2019-12-31
0001363829
esgr:RestrictionPeriodOneToTwoYearsMember
us-gaap:EquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodLessThanOneYearMember
us-gaap:PrivateEquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodMoreThanThreeYearsMember
us-gaap:HedgeFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodOneToTwoYearsMember
us-gaap:OtherLongTermInvestmentsMember
2019-12-31
0001363829
esgr:RestrictionPeriodTwoToThreeYearsMember
us-gaap:PrivateEquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodTwoToThreeYearsMember
esgr:CLOEquityMember
2019-12-31
0001363829
esgr:RestrictionPeriodNotEligibleRestrictedMember
us-gaap:OtherLongTermInvestmentsMember
2019-12-31
0001363829
esgr:RestrictionPeriodMoreThanThreeYearsMember
2019-12-31
0001363829
esgr:RestrictionPeriodOneToTwoYearsMember
esgr:CLOEquityMember
2019-12-31
0001363829
esgr:RestrictionPeriodTwoToThreeYearsMember
us-gaap:EquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodMoreThanThreeYearsMember
esgr:CLOEquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodMoreThanThreeYearsMember
us-gaap:OtherLongTermInvestmentsMember
2019-12-31
0001363829
esgr:RestrictionPeriodTwoToThreeYearsMember
us-gaap:FixedIncomeFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodOneToTwoYearsMember
2019-12-31
0001363829
esgr:RestrictionPeriodLessThanOneYearMember
us-gaap:OtherLongTermInvestmentsMember
2019-12-31
0001363829
esgr:RestrictionPeriodLessThanOneYearMember
us-gaap:HedgeFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodTwoToThreeYearsMember
esgr:CLOEquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodMoreThanThreeYearsMember
esgr:CLOEquityMember
2019-12-31
0001363829
esgr:RestrictionPeriodOneToTwoYearsMember
us-gaap:HedgeFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodNotEligibleRestrictedMember
us-gaap:EquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodLessThanOneYearMember
us-gaap:EquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodOneToTwoYearsMember
esgr:CLOEquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodNotEligibleRestrictedMember
us-gaap:HedgeFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodLessThanOneYearMember
esgr:CLOEquityMember
2019-12-31
0001363829
esgr:RestrictionPeriodLessThanOneYearMember
2019-12-31
0001363829
esgr:RestrictionPeriodMoreThanThreeYearsMember
us-gaap:PrivateEquityFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodNotEligibleRestrictedMember
us-gaap:FixedIncomeFundsMember
2019-12-31
0001363829
esgr:RestrictionPeriodNotEligibleRestrictedMember
2019-12-31
0001363829
us-gaap:OtherInvestmentsMember
2019-01-01
2019-12-31
0001363829
esgr:EnhanzedReMember
2019-12-31
0001363829
esgr:CitcoIIILimitedMember
2018-12-31
0001363829
esgr:EnhanzedReMember
2018-12-31
0001363829
esgr:MonumentMember
2018-12-31
0001363829
esgr:ClearSpringMember
2019-12-31
0001363829
esgr:MonumentMember
2019-12-31
0001363829
esgr:CitcoIIILimitedMember
2019-12-31
0001363829
esgr:ClearSpringMember
2018-12-31
0001363829
us-gaap:EquityMethodInvestmentsMember
2019-12-31
0001363829
esgr:FundsHeldDirectlyManagedVariableReturnOptionMember
2018-12-31
0001363829
esgr:FundsHeldDirectlyManagedFairValueOptionMember
2019-12-31
0001363829
esgr:FundsHeldDirectlyManagedFairValueOptionMember
2018-12-31
0001363829
esgr:FundsHeldDirectlyManagedVariableReturnOptionMember
2019-12-31
0001363829
esgr:FundsHeldDirectlyManagedMember
2019-01-01
2019-12-31
0001363829
esgr:LifeSettlementsandOtherMember
2019-01-01
2019-12-31
0001363829
esgr:EquitiesandOtherInvestmentsMember
2019-01-01
2019-12-31
0001363829
us-gaap:EquitySecuritiesMember
2018-01-01
2018-12-31
0001363829
us-gaap:EquitySecuritiesMember
2019-01-01
2019-12-31
0001363829
esgr:FundsHeldMember
2019-01-01
2019-12-31
0001363829
us-gaap:FixedMaturitiesMember
2019-01-01
2019-12-31
0001363829
esgr:EquitiesandOtherInvestmentsMember
2018-01-01
2018-12-31
0001363829
esgr:FixedMaturitiesandCashandCashEquivalentsMember
2018-01-01
2018-12-31
0001363829
esgr:ShortTermInvestmentsAndCashEquivalentsMember
2019-01-01
2019-12-31
0001363829
us-gaap:OtherInvestmentsMember
2017-01-01
2017-12-31
0001363829
esgr:ShortTermInvestmentsAndCashEquivalentsMember
2018-01-01
2018-12-31
0001363829
esgr:FundsHeldDirectlyManagedMember
2017-01-01
2017-12-31
0001363829
esgr:FundsHeldMember
2017-01-01
2017-12-31
0001363829
us-gaap:OtherInvestmentsMember
2018-01-01
2018-12-31
0001363829
esgr:LifeSettlementsandOtherMember
2017-01-01
2017-12-31
0001363829
us-gaap:FixedMaturitiesMember
2018-01-01
2018-12-31
0001363829
esgr:FundsHeldDirectlyManagedMember
2018-01-01
2018-12-31
0001363829
esgr:ShortTermInvestmentsAndCashEquivalentsMember
2017-01-01
2017-12-31
0001363829
esgr:LifeSettlementsandOtherMember
2018-01-01
2018-12-31
0001363829
esgr:FixedMaturitiesandCashandCashEquivalentsMember
2019-01-01
2019-12-31
0001363829
us-gaap:EquitySecuritiesMember
2017-01-01
2017-12-31
0001363829
us-gaap:FixedMaturitiesMember
2017-01-01
2017-12-31
0001363829
esgr:EquitiesandOtherInvestmentsMember
2017-01-01
2017-12-31
0001363829
esgr:FundsHeldMember
2018-01-01
2018-12-31
0001363829
esgr:FixedMaturitiesandCashandCashEquivalentsMember
2017-01-01
2017-12-31
0001363829
us-gaap:DebtSecuritiesMember
2019-01-01
2019-12-31
0001363829
us-gaap:DebtSecuritiesMember
2017-01-01
2017-12-31
0001363829
us-gaap:DebtSecuritiesMember
2018-01-01
2018-12-31
0001363829
us-gaap:AssetPledgedAsCollateralMember
2019-12-31
0001363829
us-gaap:AssetPledgedAsCollateralMember
2018-12-31
0001363829
us-gaap:StockOptionMember
us-gaap:NondesignatedMember
2018-12-31
0001363829
us-gaap:NetInvestmentHedgingMember
2017-01-01
2017-12-31
0001363829
us-gaap:NetInvestmentHedgingMember
2018-01-01
2018-12-31
0001363829
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2019-01-01
2019-12-31
0001363829
currency:EUR
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2017-01-01
2017-12-31
0001363829
currency:GBP
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2017-01-01
2017-12-31
0001363829
currency:AUD
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2018-01-01
2018-12-31
0001363829
currency:AUD
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2017-01-01
2017-12-31
0001363829
currency:GBP
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2019-01-01
2019-12-31
0001363829
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2017-01-01
2017-12-31
0001363829
currency:EUR
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2018-01-01
2018-12-31
0001363829
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2018-01-01
2018-12-31
0001363829
currency:GBP
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2018-01-01
2018-12-31
0001363829
currency:AUD
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2019-01-01
2019-12-31
0001363829
currency:EUR
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2019-01-01
2019-12-31
0001363829
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2019-12-31
0001363829
currency:AUD
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2018-12-31
0001363829
currency:EUR
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2018-12-31
0001363829
currency:GBP
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2018-12-31
0001363829
currency:AUD
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2019-12-31
0001363829
currency:GBP
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2019-12-31
0001363829
currency:EUR
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2019-12-31
0001363829
us-gaap:FairValueInputsLevel2Member
us-gaap:FairValueMeasurementsRecurringMember
us-gaap:DesignatedAsHedgingInstrumentMember
us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember
2018-12-31
0001363829
us-gaap:ForeignExchangeForwardMember
us-gaap:DesignatedAsHedgingInstrumentMember
2018-12-31
0001363829
us-gaap:FairValueInputsLevel2Member
us-gaap:FairValueMeasurementsRecurringMember
us-gaap:DesignatedAsHedgingInstrumentMember
us-gaap:DerivativeFinancialInstrumentsAssetsMember
2018-12-31
0001363829
currency:EUR
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2018-01-01
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
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2018-12-31
0001363829
currency:CAD
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:GBP
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2018-01-01
2018-12-31
0001363829
currency:AUD
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2018-01-01
2018-12-31
0001363829
currency:EUR
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2018-12-31
0001363829
currency:CAD
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2019-01-01
2019-12-31
0001363829
currency:AUD
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2019-12-31
0001363829
currency:EUR
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2019-12-31
0001363829
currency:EUR
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2019-01-01
2019-12-31
0001363829
currency:GBP
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2019-12-31
0001363829
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2019-12-31
0001363829
currency:GBP
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2019-01-01
2019-12-31
0001363829
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2019-01-01
2019-12-31
0001363829
currency:CAD
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2019-12-31
0001363829
currency:AUD
us-gaap:ForeignExchangeForwardMember
us-gaap:NondesignatedMember
2019-01-01
2019-12-31
0001363829
us-gaap:StockOptionMember
us-gaap:NondesignatedMember
2019-12-31
0001363829
us-gaap:StockOptionMember
us-gaap:NondesignatedMember
2018-01-01
2018-12-31
0001363829
us-gaap:StockOptionMember
us-gaap:NondesignatedMember
2019-01-01
2019-12-31
0001363829
us-gaap:InterestRateSwapMember
us-gaap:CarryingReportedAmountFairValueDisclosureMember
2019-12-31
0001363829
us-gaap:InterestRateSwapMember
2019-12-31
0001363829
us-gaap:InterestRateSwapMember
2019-01-01
2019-12-31
0001363829
esgr:AtriumSegmentMember
2018-12-31
0001363829
esgr:StarStoneSegmentMember
2018-12-31
0001363829
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:NonLifeRunOffandStarStoneSegmentMember
2019-10-01
2019-12-31
0001363829
esgr:AtriumSegmentMember
2019-12-31
0001363829
esgr:StarStoneSegmentMember
2019-12-31
0001363829
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:StarStoneSegmentMember
2018-12-31
0001363829
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2019-01-01
2019-12-31
0001363829
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:AtriumSegmentMember
2018-12-31
0001363829
esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2019-01-01
2019-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2019-12-31
0001363829
esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:AtriumSegmentMember
2018-12-31
0001363829
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:StarStoneSegmentMember
2019-12-31
0001363829
esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2019-12-31
0001363829
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2018-12-31
0001363829
esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:AtriumSegmentMember
2019-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2018-01-01
2018-12-31
0001363829
esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:AtriumSegmentMember
2018-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2018-12-31
0001363829
esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:StarStoneSegmentMember
2019-12-31
0001363829
esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2019-01-01
2019-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2018-01-01
2018-12-31
0001363829
esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:StarStoneSegmentMember
2018-12-31
0001363829
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:StarStoneSegmentMember
2019-12-31
0001363829
esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2018-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:StarStoneSegmentMember
2018-12-31
0001363829
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2018-01-01
2018-12-31
0001363829
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:AtriumSegmentMember
2019-12-31
0001363829
esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:AtriumSegmentMember
2019-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2019-01-01
2019-12-31
0001363829
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2019-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:AtriumSegmentMember
2018-12-31
0001363829
esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2018-01-01
2018-12-31
0001363829
esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2019-12-31
0001363829
esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:StarStoneSegmentMember
2018-12-31
0001363829
esgr:OtherReinsurersBalancesGreaterThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
2018-12-31
0001363829
esgr:OtherReinsurersBalancesLessThanOneMillionDollarsMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:StarStoneSegmentMember
2019-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsuranceRecoverableMember
us-gaap:ReinsurerConcentrationRiskMember
esgr:AtriumSegmentMember
2019-12-31
0001363829
esgr:TopTenReinsurersNonRatedReinsurersMember
us-gaap:ReinsurerConcentrationRiskMember
2018-12-31
0001363829
esgr:TopTenReinsurersNonRatedReinsurersMember
us-gaap:ReinsurerConcentrationRiskMember
2019-12-31
0001363829
esgr:TopTenReinsurersRatedAMinusOrHigherMember
us-gaap:ReinsurerConcentrationRiskMember
2019-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsurerConcentrationRiskMember
2018-12-31
0001363829
esgr:TopTenReinsurersRatedAMinusOrHigherMember
us-gaap:ReinsurerConcentrationRiskMember
2018-12-31
0001363829
esgr:HannoverRuckSEMember
us-gaap:ReinsurerConcentrationRiskMember
us-gaap:EquityMethodInvesteeMember
2018-12-31
0001363829
esgr:TopTenReinsurersMember
us-gaap:ReinsurerConcentrationRiskMember
2019-12-31
0001363829
esgr:LloydsSyndicateMember
us-gaap:ReinsurerConcentrationRiskMember
us-gaap:EquityMethodInvesteeMember
2019-12-31
0001363829
esgr:HannoverRuckSEMember
us-gaap:ReinsurerConcentrationRiskMember
us-gaap:EquityMethodInvesteeMember
2019-12-31
0001363829
esgr:LloydsSyndicateMember
us-gaap:ReinsurerConcentrationRiskMember
us-gaap:EquityMethodInvesteeMember
2018-12-31
0001363829
esgr:ReinsurersRatedBelowAMinusMember
us-gaap:CededCreditRiskSecuredMember
2019-12-31
0001363829
esgr:ReinsurersRatedAMinusOrAboveMember
2018-12-31
0001363829
esgr:ReinsurersRatedBelowAMinusMember
us-gaap:CededCreditRiskUnsecuredMember
2019-12-31
0001363829
esgr:ReinsurersRatedAMinusOrAboveMember
2019-12-31
0001363829
esgr:ReinsurersRatedBelowAMinusMember
us-gaap:CededCreditRiskSecuredMember
2018-12-31
0001363829
esgr:ReinsurersRatedBelowAMinusMember
us-gaap:CededCreditRiskUnsecuredMember
2018-12-31
0001363829
us-gaap:OperatingSegmentsMember
esgr:StarStoneSegmentMember
2019-12-31
0001363829
esgr:CorporateAndReconcilingItemsMember
2019-12-31
0001363829
us-gaap:OperatingSegmentsMember
esgr:AtriumSegmentMember
2019-12-31
0001363829
us-gaap:OperatingSegmentsMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OperatingSegmentsMember
esgr:StarStoneSegmentMember
2018-12-31
0001363829
esgr:CorporateAndReconcilingItemsMember
2018-12-31
0001363829
us-gaap:OperatingSegmentsMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
us-gaap:OperatingSegmentsMember
esgr:AtriumSegmentMember
2018-12-31
0001363829
esgr:StarStoneSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:CorporateAndReconcilingItemsMember
2019-01-01
2019-12-31
0001363829
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:StarStoneSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:CorporateAndReconcilingItemsMember
2018-01-01
2018-12-31
0001363829
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:AtriumSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:NonlifeRunoffSegmentMember
2017-01-01
2017-12-31
0001363829
esgr:AtriumSegmentMember
2017-01-01
2017-12-31
0001363829
esgr:StarStoneSegmentMember
2017-01-01
2017-12-31
0001363829
esgr:LiabilityClaimsandClaimsAdjustmentExpenseMember
esgr:SegmentConcentrationRiskMember
esgr:AtriumSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:AsbestosExposureMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineTwoPortfoliosMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:AsbestosExposureSixCommutationsMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineSixCommunicationsMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:PropertyMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:MotorMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:NonlifeRunoffSegmentMember
2019-01-01
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:MotorMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:AsbestosExposureMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:PropertyMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:ShortdurationInsuranceContractsAccidentYears20102014Member
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineSevenCommunicationsMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:AsbestosExposureEightCommunicationsMember
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:ShortdurationInsuranceContractsAccidentYears19952005Member
esgr:NonlifeRunoffSegmentMember
2018-01-01
2018-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
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
esgr:MotorMember
esgr:NonlifeRunoffSegmentMember
2017-01-01
2017-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2017-01-01
2017-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2017-01-01
2017-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:NonlifeRunoffSegmentMember
2017-01-01
2017-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2017-01-01
2017-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:NonlifeRunoffSegmentMember
2017-01-01
2017-12-31
0001363829
esgr:PropertyMember
esgr:NonlifeRunoffSegmentMember
2017-01-01
2017-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:AsbestosExposureMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:MotorMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:PropertyMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MarineAviationandTransitExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:AsbestosExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:GeneralCasualtyInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:PropertyMember
esgr:BusinessAcquiredAndContractsInceptingInTheYearEnded2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:EnvironmentalExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
us-gaap:OtherShortdurationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ProfessionalIndemnityDirectorsOfficersMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:ConstructionDefectExposureMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:MotorMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2011-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2010-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312010Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2012-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortDurationInsuranceContractAccidentYear2019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2011-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2011-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2012-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2012-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2012-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2011-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2012-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312011Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
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:ShortDurationInsuranceContractAccidentYear2019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2012-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2012-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2012-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312012Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2012-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortDurationInsuranceContractAccidentYear2019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2013-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312013Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortDurationInsuranceContractAccidentYear2019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2014-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312014Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortDurationInsuranceContractAccidentYear2019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
2015-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
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:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
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:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortDurationInsuranceContractAccidentYear2019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
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:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2015-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312015Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortDurationInsuranceContractAccidentYear2019Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2018Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortDurationInsuranceContractsAccidentYear2017Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2010Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
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:ShortdurationInsuranceContractsAccidentYear2016Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2012Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2013Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2017-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2015Member
esgr:NonlifeRunoffSegmentMember
2019-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2011Member
esgr:NonlifeRunoffSegmentMember
2018-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
us-gaap:ShortdurationInsuranceContractsAccidentYear2014Member
esgr:NonlifeRunoffSegmentMember
2016-12-31
0001363829
esgr:WorkersCompensationInsuranceProductLineMember
esgr:BusinessAcquiredandContractsInceptingintheYearEndedDecember312016Member
esgr:ShortDurationInsuranceContractsAccidentYear2009AndPriorMember
esgr:NonlifeRunoffSegmentMember
2019-12-31