ESGR


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents


us-gaap:ConsolidatedEntities, us-gaap:StatementClassOfStock
us-gaap:CommonStockValue
us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
us-gaap:AwardType, us-gaap:PlanName

us-gaap:BenefitsLossesAndExpenses

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostsAndExpenses
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:StatementScenario, us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:SubsequentEventType

us-gaap:GainLossOnInvestments
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:GeneralAndAdministrativeExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:InterestExpenseDebt

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents

us-gaap:NetInvestmentIncome
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:OperatingExpenses
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherIncome
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:PreferredStockDividendsIncomeStatementImpact
us-gaap:ConsolidationItems

us-gaap:PremiumsEarnedNet
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:Revenues
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:Assets
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:Liabilities
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities
us-gaap:CounterpartyName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:AmortizationOfIntangibleAssets

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:DeferredTaxAssetsLiabilitiesNet
us-gaap:StatementGeographical

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:EquitySecuritiesFvNi
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:FinancialInstrument
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:LongTermDebt
us-gaap:ConsolidatedEntities
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:MinorityInterest

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities, us-gaap:StatementClassOfStock
us-gaap:CommonStockValue
us-gaap:StatementClassOfStock

us-gaap:AdditionalPaidInCapital
us-gaap:ConsolidatedEntities

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:ConsolidatedEntities

us-gaap:MinorityInterest
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInInvestingActivities
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:ConsolidatedEntities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:ConsolidatedEntities

us-gaap:AmortizationOfFinancingCosts

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities

us-gaap:NetIncomeLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:NetCashProvidedByUsedInInvestingActivities
us-gaap:ConsolidatedEntities

us-gaap:PaymentsToAcquireInvestments
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromIssuanceOfLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:ShareRepurchaseProgram, us-gaap:SubsequentEventType
us-gaap:SubsequentEventType

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:StatementGeographical
us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
esgr:AssumedPremiumsEarnedExpense
us-gaap:ConsolidatedEntities
esgr:CapitalWithdrawalsFromVariableInterestEntity

esgr:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperationsPeriodIncreaseDecreaseIncludingExchangeRateEffect
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
esgr:CededPremiumEarnedExpense

esgr:ChangeInCaseAndLossAdjustmentExpenseReservePeriodIncreaseDecrease
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
esgr:ChangeInCaseAndLossAdjustmentExpenseReservePeriodIncreaseDecreaseCurrentYear
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
esgr:ChangeInCaseAndLossAdjustmentExpenseReservePeriodIncreaseDecreasePriorYears

esgr:ChangeinCaseandLossAdjustmentExpenseReservePeriodIncreaseDecrease
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
esgr:ChangeinCaseandLossAdjustmentExpenseReservePeriodIncreaseDecreaseCurrentYear
us-gaap:StatementBusinessSegments
esgr:ChangeinCaseandLossAdjustmentExpenseReservePeriodIncreaseDecreasePriorYears
us-gaap:StatementBusinessSegments
esgr:ChangeinCaseandLossAdjustmentExpenseandLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedClaimsAmountPeriodIncreaseDecrease

esgr:ClaimsAndClaimsAdjustmentExpenseAmortizationOfFairValueAdjustments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
esgr:ClaimsAndClaimsAdjustmentExpenseAmortizationOfFairValueAdjustmentsPriorYears

esgr:ClaimsAndClaimsAdjustmentExpenseChangeInFairValue
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
esgr:ClaimsAndClaimsAdjustmentExpenseChangeInFairValuePriorYears
us-gaap:ConsolidatedEntities
esgr:ConsolidationOfVariableInterestEntityOpeningCashCashEquivalentsAndRestrictedCashBalances
us-gaap:StatementOperatingActivitiesSegment
esgr:DebtSecuritiesAvailableForSaleChangeInPresentValueTax

esgr:DeferredCostsCurrentAndNoncurrentAmortization
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
esgr:DeferredCostsCurrentAndNoncurrentAmortizationPriorYear

esgr:DeferredGainLiabilityAdditions

esgr:DeferredGainLiabilityAmortizationExpense

esgr:DirectAndAssumedPremiumsEarned
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

esgr:DirectandAssumedPremiumsEarned
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DiscontinuedOperationIntraEntityAmountsDiscontinuedOperationAfterDisposalIncomeExpense
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DiscontinuedOperationIntraEntityAmountsDiscontinuedOperationAfterDisposalIncomeLossFromContinuingOperations
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationBenefitsLossesandExpenses
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationBusinessCombinationAcquisitionRelatedCosts
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationGainLossonInvestments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationNetInvestmentIncome
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationPremiumsEarnedNet
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationsAccumulatedOtherComprehensiveGainsLossDebtSecuritiesAvailableForSale

esgr:EarningsBeforeInterestExpenseTaxesAndForeignExchangeGainLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService
esgr:EstimateOfNetUltimateLossesPeriodIncreaseDecreaseUnfavorableDevelopment

esgr:EstimatesOfNetUltimateLossesPeriodIncreaseDecrease
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
esgr:EstimatesOfNetUltimateLossesPeriodIncreaseDecreaseCurrentYear
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
esgr:EstimatesOfNetUltimateLossesPeriodIncreaseDecreasePriorYears
us-gaap:StatementBusinessSegments

esgr:EstimatesofNetUltimateLossesPeriodIncreaseDecrease
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
esgr:EstimatesofNetUltimateLossesPeriodIncreaseDecreaseCurrentYear
us-gaap:StatementBusinessSegments
esgr:EstimatesofNetUltimateLossesPeriodIncreaseDecreasePriorYears
us-gaap:FairValueByLiabilityClass, us-gaap:FairValueByMeasurementFrequency, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
esgr:FairValueInputsLiabilityforClaimsandClaimsAdjustmentExpense
us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
esgr:FairValueInputsRiskCostofCapital
us-gaap:FairValueByLiabilityClass, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
esgr:FairValueInputsWeightedAverageCostofCapital

esgr:FairValueMeasurementWithUnobservableInputReconciliationRecurringBasisAssetLiabilityPurchases

esgr:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityForeignCurrencyTranslationGainLoss

esgr:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityNetIncurredLossesAndLossAdjustmentExpense

esgr:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityReductionInUnallocatedLossAdjustmentExpense

esgr:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilitySettlements
us-gaap:FairValueByAssetClass
esgr:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetReductionInEstimateOfUltimateLosses
us-gaap:FairValueByLiabilityClass
esgr:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityReductionInEstimateOfUltimateLosses
us-gaap:FairValueByLiabilityClass
esgr:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityReductionInUnallocatedLossAdjustmentExpense
us-gaap:FairValueByAssetClass
esgr:FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss

esgr:FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetLiabilityReductionInEstimateOfUltimateLosses
us-gaap:FairValueByAssetClass
esgr:FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetNetIncurredLossesAndLossAdjustmentExpense
us-gaap:FairValueByLiabilityClass
esgr:FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationGainLoss
us-gaap:FairValueByLiabilityClass
esgr:FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisLiabilityNetIncurredLossesAndLossAdjustmentExpense

esgr:FiniteLivedIntangibleAssetsReclassifiedToHeldForSale
us-gaap:ConsolidatedEntities
esgr:IncreaseDecreaseInDueFromBrokersExcludingRestrictedCash
us-gaap:ConsolidatedEntities
esgr:IncreaseDecreaseInDueToBrokers
us-gaap:ConsolidationItems
esgr:IncreaseDecreaseInGeneralAndAdministrativeExpense
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

esgr:IncreaseDecreaseInInvestmentFees

esgr:IncreaseDecreaseInLiabilityforAsbestosandEnvironmentalClaims
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
esgr:IncreaseDecreaseInOtherInvestments
us-gaap:ConsolidatedEntities
esgr:IncreaseDecreaseInPayableForInvestmentsPurchased
us-gaap:ConsolidatedEntities
esgr:IncreaseDecreaseInPerformanceFeePayable

esgr:IncreaseDecreaseInPremiumsWrittenGross
us-gaap:StatementBusinessSegments
us-gaap:ConsolidatedEntities
esgr:IncreaseDecreaseInReceivableFromInvestmentsSold

esgr:IncreaseDecreaseReinsuranceRecoverableForPaidAndUnpaidClaimsAndClaimsAdjustments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
esgr:IncreaseReductionInProvisionForUnallocatedClaimAdjustmentExpensePriorYears
us-gaap:StatementBusinessSegments

esgr:IndefiniteIntangibleAssetsReclassifiedToHeldForSale

esgr:InsuranceRecoverableCreditLossExpenseReversal

esgr:IntangibleAssetsIncludingGoodwillReclassifiedToHeldForSale

esgr:InterestExpenseFundsHeldUnderReinsuranceAgreements
esgr:AssetAcquisition
esgr:InvestmentPercentageCeded
us-gaap:CounterpartyName, us-gaap:StatementScenario

esgr:LeaseCostGross

esgr:LiabilityForAsbestosAndEnvironmentalClaimsNetIncreaseReductionInEstimatedFutureExpenses

esgr:LiabilityForAsbestosAndEnvironmentalClaimsPeriodExpenseIncome

esgr:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAssumedBusiness
us-gaap:CounterpartyName
us-gaap:StatementBusinessSegments
us-gaap:StatementScenario, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:CounterpartyName
esgr:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAssumedBusinessNet
us-gaap:CounterpartyName, us-gaap:StatementScenario
us-gaap:CounterpartyName, us-gaap:SubsequentEventType

esgr:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseCededBusiness
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StatementBusinessSegments

esgr:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedClaimsAmountPeriodIncreaseDecrease
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
esgr:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedClaimsAmountPeriodIncreaseDecreaseCurrentYear
us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
esgr:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedClaimsAmountPeriodIncreaseDecreasePriorYears
us-gaap:StatementBusinessSegments

esgr:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReclassificationsToHeldForSale
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
esgr:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTransfer

esgr:LiabilityforAsbestosandEnvironmentalClaimsNetAmortizationOfFairValueAdjustments

esgr:LiabilityforAsbestosandEnvironmentalClaimsNetChangeInActuarialEstimates
us-gaap:CounterpartyName
esgr:LiabilityforClaimsandClaimsAdjustmentExpenseReinsurancePremiumConsideration
us-gaap:CounterpartyName, us-gaap:SubsequentEventType
us-gaap:ConsolidatedEntities
esgr:NetDisbursementsOnDerivativeContractsAndForeignCurrencies

esgr:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesReclassificationAdjustmentFromAOCIForSaleOfSubsidiaryNetOfTax

esgr:OtherComprehensiveIncomeLossNetofTaxPortionAttributabletoRedeemableNoncontrollingInterest

esgr:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSubsidiaryNetOfTax
us-gaap:StatementEquityComponents

esgr:OtherComprehensiveIncomeLossSecuritiesAvailableForSaleReclassificationAdjustmentFromAOCIForChangeInAllowanceForCreditLossesNetofTax
us-gaap:StatementEquityComponents
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument, us-gaap:RelatedPartyTransactionsByRelatedParty
esgr:OtherInvestmentsPercentageOfFundsInvested
us-gaap:ConsolidatedEntities
esgr:PaymentsToCoverSecuritiesSoldShort
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
esgr:PreferredStockDividendsPerDepositaryShareDeclared
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:ProceedsFromDivestureOfBusinessValueOfSharesReceived
dei:LegalEntity
esgr:ProceedsFromSaleOfRenewalRights
dei:LegalEntity, us-gaap:SubsequentEventType
us-gaap:ConsolidatedEntities
esgr:ProceedsFromSecuritiesSoldShort

esgr:ProvisionForUnallocatedClaimAdjustmentExpense
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
esgr:ProvisionForUnallocatedClaimAdjustmentExpenseCurrentYear
us-gaap:StatementBusinessSegments
us-gaap:ConsolidatedEntities
esgr:RealizedGainLossOnSaleOfInvestmentsAndDerivatives
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us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationCarryingValue
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationCashConsideration
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty
esgr:DisposalGroupIncludingDiscontinuedOperationCashConsiderationRepayable
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationConsiderationValueOfShares
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationDebtSecuritiesAvailableForSale
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:InvestmentType
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationDeferredAcquisitionCosts
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationFundsHeldUnderReinsuranceAgreementsAsset
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationInitialCashConsideration
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsIncludingGoodwill
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationInvestments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationLiabilityForClaimsAndClaimsAdjustmentExpenseCost
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationLongTermDebt
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationNetAssets
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiability
us-gaap:DisposalGroupClassification, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationOperatingLeaseRightOfUseAsset
us-gaap:DisposalGroupClassification, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationOtherInvestments
us-gaap:StatementScenario, us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationPremiumToTangibleBookValue
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationPremiumsReceivableNet
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationReinsurancePayable
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationReinsuranceRecoverableForPaidAndUnpaidClaimsAndClaimsAdjustmentsCost
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationRestrictedCashandCashEquivalents
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationRestrictedInvestment
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationTradingSecuritiesDebt
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:InvestmentType
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationTradingSecuritiesEquity
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
esgr:DisposalGroupIncludingDiscontinuedOperationUnearnedPremiums

esgr:DistributionOfSyndicateResults
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
esgr:EquityMethodInvestmentOwnershipPercentageFullyDilutedBasis

esgr:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityValue
us-gaap:InvestmentType
esgr:FundsHeldDirectlyManagedCashAndCashEquivalents
us-gaap:InvestmentType
esgr:FundsHeldDirectlyManagedOtherAssets

esgr:FundsHeldunderReinsuranceAgreementsDirectlyManagedNetAsset
us-gaap:InvestmentType

esgr:FundsinSyndicate

esgr:FundsinSyndicateCashandInvestments
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
esgr:IndefiniteLivedIntangibleAssetsAccumulatedImpairmentLosses

esgr:InsuranceRecoverableAllowanceForCreditLoss

esgr:InsuranceRecoverables

esgr:InsuranceRecoverablesFairValueAdjustments

esgr:IntangibleAssetsAccumulatedAmortizationAndImpairmentLosses

esgr:IntangibleAssetsGrossIncludingGoodwill
us-gaap:ConsolidatedEntities
esgr:InvestmentPurchasedPayable
us-gaap:ConsolidatedEntities
esgr:InvestmentsinSubsidiaries

esgr:LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour

esgr:LiabilityForAsbestosAndEnvironmentalClaimsDefendantGross
us-gaap:EnvironmentalRemediationContingency

esgr:LiabilityForAsbestosAndEnvironmentalClaimsDefendantNet
us-gaap:CumulativeEffectPeriodOfAdoption

esgr:LiabilityForAsbestosAndEnvironmentalClaimsDisputedInsuranceRecoveries

esgr:LiabilityForAsbestosAndEnvironmentalClaimsGrossFairValueAdjustments

esgr:LiabilityForClaimsAndClaimsAdjustmentExpenseExcludingSyndicate
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

esgr:LiabilityForClaimsAndClaimsAdjustmentExpenseFairValueAdjustments
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:CounterpartyName
us-gaap:StatementBusinessSegments

esgr:LiabilityForClaimsAndClaimsAdjustmentExpenseFairValueAdjustmentsatFairValue
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
esgr:LiabilityForClaimsAndClaimsAdjustmentExpenseNetFairValueAdjustments
us-gaap:StatementBusinessSegments
esgr:LiabilityForClaimsAndClaimsAdjustmentExpenseNetFairValueAdjustmentsatFairValue

esgr:LiabilityForClaimsAndClaimsAdjustmentExpenseRelatedToSyndicate
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
esgr:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAllowanceForLosses
us-gaap:StatementBusinessSegments

esgr:LiabilityforClaimsandClaimsAdjustmentExpenseCost
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

esgr:LiabilityforClaimsandClaimsAdjustmentExpenseFairValue
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:StatementBusinessSegments
esgr:LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpenseGross

esgr:LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpenseNet
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
esgr:LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseExcludingAccumulatedUnallocatedClaimAdjustmentExpense
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
esgr:LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseIncurredbutNotReportedIBNRClaimsAmountNetExcludingUnallocated
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
esgr:LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseNetExcludingAccumulatedUnallocatedClaimAdjustmentExpense
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
esgr:LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseReportedClaimsAmountNetExcludingUnallocated
us-gaap:StatementBusinessSegments
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
esgr:LineOfCreditFacilityAccordionFeatureIncreaseLimit
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
esgr:LineofCreditFacilityAccordianFeatureIncreaseLimit
us-gaap:CounterpartyName
esgr:NetInvestments
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
esgr:OtherLiabilitiesCeded
us-gaap:ConsolidatedEntities
esgr:PayablestoSubsidiaries

esgr:PercentageofReinsuranceRecoverablesAllowancetoReinsuranceRecoverablesGross
us-gaap:CededCreditRisk
us-gaap:CededCreditRisk, us-gaap:CededCreditRiskCollateralization
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty
esgr:QuotaShareReinsuranceAgreementPercentage
us-gaap:ConsolidatedEntities
esgr:ReceivablesFromSubsidiaries

esgr:ReinsuranceRecoverableAfterAllowanceForCreditLoss
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

esgr:ReinsuranceRecoverableAtCostAllowanceForCreditLoss

esgr:ReinsuranceRecoverableBeforePaidClaims
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

esgr:ReinsuranceRecoverableFairValueAdjustment
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

esgr:ReinsuranceRecoverableFairValueAdjustmentatFairValue
us-gaap:ConsolidationItems
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:StatementBusinessSegments

esgr:ReinsuranceRecoverableRelatingToSyndicate
us-gaap:StatementBusinessSegments

esgr:ReinsuranceRecoverableforPaidandUnpaidClaimsandClaimsAdjustmentsCost
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

esgr:ReinsuranceRecoverableforPaidandUnpaidClaimsandClaimsAdjustmentsFairValue
us-gaap:ConsolidationItems
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction
us-gaap:StatementBusinessSegments

esgr:ReinsuranceRecoverableforUnpaidClaimsandClaimsAdjustmentsExcludingIncurredButNotReported
us-gaap:StatementBusinessSegments

esgr:ReinsuranceRecoverableforUnpaidClaimsandClaimsAdjustmentsUnallocatedLossAdjustmentExpense
us-gaap:StatementBusinessSegments
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
esgr:RelatedPartyTransactionInvestmentsFromRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:Ownership, us-gaap:StatementScenario
esgr:RelatedPartyTransactionPercentageOfSharesOwnedToDesignateBoardOfDirectors
us-gaap:RelatedPartyTransactionsByRelatedParty
esgr:RetrocessionAgreementReinsuredPortfolioLiability
us-gaap:ConsolidatedEntities
esgr:SaleOfInvestmentsReceivable
us-gaap:PlanName
esgr:ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfAwardSubjectToVesting
us-gaap:AwardType
esgr:SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice
us-gaap:StatutoryAccountingPracticesByJurisdiction
esgr:StatutoryAccountingPracticesMinimumCapitalRequirementExcessAmount
us-gaap:StatutoryAccountingPracticesByJurisdiction
esgr:StatutoryAccountingPracticesMinimumSolvencyRequirementExcessAmount
us-gaap:StatutoryAccountingPracticesByJurisdiction
esgr:StatutoryAccountingPracticesRiskBasedCapitalRequirementExcessAmount

esgr:SupplementaryInsuranceInformationLossesClaimsandLossExpenseReserves
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
dei:LegalEntity
esgr:SyndicateAmountDueUnderCapacityLeaseAgreement
dei:LegalEntity
esgr:SyndicateAmountDueUnderReinsuranceAgreement
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
esgr:TerminationAndReleaseAgreementPerformanceFeeWaived
us-gaap:CounterpartyName, us-gaap:StatementScenario, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValuePercent
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValuePercent
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingYearThreeThroughFiveAmortizedCost
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingYearThreeThroughFiveFairValue
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingYearThreeThroughFiveFairValuePercent
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingYearTwoAmortizedCost
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingYearTwoFairValue
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingYearTwoFairValuePercent
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingafterTenYearsAmortizedCost
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingafterTenYearsFairValue
us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitiesRollingafterTenYearsFairValuePercent
us-gaap:FinancialInstrument, us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitieswithoutSingleMaturityDateAmortizedCostBasis
us-gaap:FinancialInstrument, us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitieswithoutSingleMaturityDateFairValue
us-gaap:FinancialInstrument, us-gaap:InvestmentType
esgr:TradingSecuritiesDebtMaturitieswithoutSingleMaturityDateFairValuePercent

esgr:TradingSecuritiesandAvailableforSaleSecuritiesDebtSecurities
us-gaap:FinancialInstrument

esgr:TradingSecuritiesandAvailableforSaleSecuritiesDebtSecuritiesAmortizedCost

esgr:VariableInterestEntityFairValue
us-gaap:FinancialInstrument

esgr:VariableInterestEntityRedemptionAmount
us-gaap:InvestmentType, us-gaap:SubsequentEventType
us-gaap:ConsolidatedEntities, us-gaap:SubsequentEventType
esgr:VariableInterestEntityRedemptionNoticeAmount

esgr:VariableInterestEntityUnfundedCommitment
us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AlternativeInvestment
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:AlternativeInvestmentMeasurementInput
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique

us-gaap:AssetsHeldInTrust

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementBusinessSegments

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:CounterpartyName, us-gaap:InvestmentType
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:InvestmentType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:InvestmentType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:InvestmentType, us-gaap:RelatedPartyTransaction
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
dei:LegalEntity, us-gaap:FinancialInstrument
us-gaap:CommitmentsFairValueDisclosure
us-gaap:FinancialInstrument
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFairValue

us-gaap:DebtSecurities

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:Collateral
us-gaap:DebtSecuritiesTradingRestricted

us-gaap:DeferredCostsCurrentAndNoncurrent
us-gaap:StatementBusinessSegments
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredPolicyAcquisitionCosts

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards
us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve

us-gaap:DeferredTaxLiabilitiesInvestments

us-gaap:DeferredTaxLiabilitiesOther
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:DepositAssets
us-gaap:ConsolidatedEntities
us-gaap:DerivativeAssetNotionalAmount
us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:Position
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:Position
us-gaap:ConsolidatedEntities
us-gaap:DerivativeAssets
us-gaap:ConsolidatedEntities, us-gaap:CounterpartyName
us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk
us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:ConsolidatedEntities, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:ConsolidatedEntities, us-gaap:FairValueByMeasurementFrequency
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:Position
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:Position
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation, us-gaap:InvestmentType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation, us-gaap:InvestmentType
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:ConsolidatedEntities
us-gaap:DerivativeCollateralRightToReclaimCash
us-gaap:ConsolidatedEntities, us-gaap:CounterpartyName
us-gaap:ConsolidatedEntities
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:ConsolidatedEntities, us-gaap:CounterpartyName
us-gaap:ConsolidatedEntities
us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
us-gaap:ConsolidatedEntities, us-gaap:CounterpartyName
us-gaap:ConsolidatedEntities
us-gaap:DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral
us-gaap:ConsolidatedEntities, us-gaap:CounterpartyName
us-gaap:ConsolidatedEntities
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:ConsolidatedEntities, us-gaap:CounterpartyName
us-gaap:ConsolidatedEntities
us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
us-gaap:ConsolidatedEntities, us-gaap:CounterpartyName
us-gaap:ConsolidatedEntities
us-gaap:DerivativeLiabilities
us-gaap:ConsolidatedEntities, us-gaap:CounterpartyName
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us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:ConsolidatedEntities, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:ConsolidatedEntities, us-gaap:FairValueByMeasurementFrequency
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:Position
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:Position
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation, us-gaap:InvestmentType
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us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation, us-gaap:InvestmentType
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:ConsolidatedEntities
us-gaap:DerivativeLiabilityNotionalAmount
us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:Position
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:Position
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationConsideration
us-gaap:StatementScenario, us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationDeferredTaxAssets
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationDeferredTaxLiabilities
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherAssets
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherLiabilities
us-gaap:ConsolidatedEntities
us-gaap:DueFromCorrespondentBrokers
us-gaap:ConsolidatedEntities
us-gaap:DueToCorrespondentBrokers
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:PlanName

us-gaap:EquityMethodInvestmentAggregateCost
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentOwnershipPercentage
dei:LegalEntity, us-gaap:Ownership
dei:LegalEntity, us-gaap:Ownership, us-gaap:StatementClassOfStock
dei:LegalEntity, us-gaap:Ownership, us-gaap:StatementScenario
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:Ownership
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

us-gaap:EquityMethodInvestments
dei:LegalEntity, us-gaap:CounterpartyName
dei:LegalEntity, us-gaap:Ownership
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:FinancialInstrument
us-gaap:EquitySecuritiesFvNiCurrentAndNoncurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:CounterpartyName, us-gaap:InvestmentType, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments
us-gaap:FinancialInstrument
us-gaap:InvestmentType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:InvestmentType

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
us-gaap:FairValueByAssetClass
us-gaap:InvestmentType
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
us-gaap:ConsolidatedEntities
us-gaap:FinancialInstrumentsSoldNotYetPurchasedAtFairValue

us-gaap:FundsHeldUnderReinsuranceAgreementsAsset
us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:GoodwillGross
us-gaap:ConsolidatedEntities, us-gaap:GuaranteeObligationsByNature
us-gaap:GuaranteeObligationsCurrentCarryingValue
us-gaap:GuaranteeObligationsByNature

us-gaap:InsuranceSettlementsReceivable

us-gaap:IntangibleAssetsGrossExcludingGoodwill
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:InvestmentOwnedAtFairValue

us-gaap:Investments
us-gaap:ConsolidatedEntities
us-gaap:CounterpartyName

us-gaap:InvestmentsFairValueDisclosure

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:ShortTermDebtType
us-gaap:Restatement, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:LiabilityForAsbestosAndEnvironmentalClaimsGross
us-gaap:EnvironmentalRemediationContingency

us-gaap:LiabilityForAsbestosAndEnvironmentalClaimsNet

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StatementBusinessSegments

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet
us-gaap:StatementBusinessSegments

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LossContingencyAccrualAtCarryingValue
dei:LegalEntity, us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners
dei:LegalEntity, us-gaap:Ownership, us-gaap:StatementScenario
dei:LegalEntity, us-gaap:Ownership, us-gaap:SubsequentEventType
us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByParent
us-gaap:Ownership, us-gaap:StatementScenario

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName
us-gaap:OperatingLossCarryforwards
us-gaap:ConsolidatedEntities
us-gaap:OtherAssetsMiscellaneous

us-gaap:OtherInvestments

us-gaap:OtherLiabilities
us-gaap:ConsolidatedEntities
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent
us-gaap:ConsolidatedEntities, us-gaap:StatementClassOfStock
us-gaap:PreferredStockValue
us-gaap:StatementClassOfStock

us-gaap:PremiumsReceivableAtCarryingValue
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:ReinsurancePayable
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:ReinsuranceReceivablesIncurredButNotReportedClaims
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments

us-gaap:ReinsuranceRecoverablesAllowance
us-gaap:CededCreditRisk
us-gaap:CededCreditRisk, us-gaap:CededCreditRiskCollateralization

us-gaap:ReinsuranceRecoverablesGross
us-gaap:CededCreditRisk
us-gaap:CededCreditRisk, us-gaap:CededCreditRiskCollateralization

us-gaap:ReinsuranceRecoverablesOnPaidAndUnpaidLosses
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CededCreditRisk
us-gaap:CededCreditRisk, us-gaap:CededCreditRiskCollateralization
us-gaap:CededCreditRisk, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:CededCreditRisk, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:StatementBusinessSegments
us-gaap:CededCreditRisk, us-gaap:ConcentrationRiskByType
us-gaap:CededCreditRisk, us-gaap:ConcentrationRiskByType, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:CededCreditRisk, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConsolidationItems, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StatementBusinessSegments

us-gaap:ReinsuranceRecoverablesOnPaidLosses
us-gaap:StatementBusinessSegments

us-gaap:RestrictedCashAndCashEquivalents
us-gaap:ConsolidatedEntities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

us-gaap:RestrictedCashAndInvestments
us-gaap:ConsolidatedEntities, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure
us-gaap:ConsolidatedEntities, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:ConsolidatedEntities, us-gaap:FairValueByMeasurementFrequency
us-gaap:ConsolidatedEntities, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive
us-gaap:ProductOrService, us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour
us-gaap:ProductOrService, us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne
us-gaap:ProductOrService, us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix
us-gaap:ProductOrService, us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree
us-gaap:ProductOrService, us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo
us-gaap:ProductOrService, us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatutoryAccountingPracticesByJurisdiction
us-gaap:StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance
us-gaap:StatutoryAccountingPracticesByJurisdiction
us-gaap:StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersDeferredPolicyAcquisitionCosts

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersReservesForUnpaidClaimsAndClaimsAdjustmentExpense

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersUnearnedPremiums

us-gaap:SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:SupplementaryInsuranceInformationUnearnedPremiums
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:TreasuryStockCommonValue

us-gaap:UnearnedPremiums
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount
us-gaap:FinancialInstrument

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Operating Lease Right Of Use Asset
Liabilities
Operating Lease Liability
Noncurrent Liabilities
Deferred Income Tax Liabilities Net
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:CommonStockValue us-gaap:ConsolidatedEntities,us-gaap:StatementClassOfStock srt:ParentCompany,esgr:CommonClassENANA0.91NANANA0.91NANANA0.91NANANA0.405NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockValue us-gaap:ConsolidatedEntities,us-gaap:StatementClassOfStock srt:ParentCompany,esgr:VotingCommonStockNANA18.576NANANA18.002NANANA17.95NANANA16.402NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock esgr:CommonClassE█████████████▁▁▁▁▁▁0.910.910.910.910.910.910.910.910.910.910.910.910.910.4050.4050.4050.4050.4050.405NANANA0.405NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock esgr:VotingCommonStock██████▆▆▆▆▆▆▆▂▂▂▂▂▁▁▁▁▁18.57118.59618.57618.5618.63518.6118.00217.98117.97517.95817.9517.93417.9316.41316.40216.39116.38616.38116.17516.17116.16716.16316.133NANANA15.761NANANANA13.80113.813.79913.75213.71313.71213.7113.66513.52113.52NA12.94NANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassC▄▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▆▆2.692.692.62.62.62.62.62.62.62.62.62.62.62.62.62.62.62.62.7922.7262.726NA2.726NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁█21.83221821.852324NA21.77872921.78924221.779906NA21.72049721.67545121.645862NA21.66535620.67123219.602512NA19.55916819.51142919.501663NA19.4494319.43046419.408894NA19.40862719.38375319.334637NA19.3313919.32751616.705324NA16.72071516.69394316.676056NA16.67652916.67479216.67171NA14.55916414.28568513.220332NA14.01976814.019489NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁21.63174921.562341NA21.57810621.5652421.549844NA21.48821621.47777221.463499NA21.44091420.46278819.409021NA19.3921219.3876519.374728NA19.29903819.2952819.282946NA19.25618419.25235919.237461NA19.19847518.63608516.564083NA16.52501216.52502616.514193NA16.4377816.43640116.427595NA14.27000313.99917912.945838NA13.70483213.702832NA
us-gaap:EarningsPerShareBasic ▆▅█▇█▁▅▄▅▆▃▄▄▃▄▄▄▄▄▅▄▄▄▄▄▄▄▄▄▄▅▄▄▄▄▄▄▄▅▄▄▄▅▄▄▄17.448.538.2428.537.03-23.989.025.4810.7916.71-5.29-0.740.4-2.126.582.014.652.821.178.092.12.365.82.550.762.335.661.382.781.798.322.421.160.724.252.92.480.598.890.850.670.279.611.560.911.17
us-gaap:EarningsPerShareDiluted ▆▅█▇█▁▅▄▅▆▃▄▄▃▄▄▄▄▄▅▄▄▄▄▄▄▄▄▄▄▅▄▄▄▄▄▄▄▅▄▄▄▅▄▄▄17.288.3837.7928.2436.65-23.988.895.4210.716.57-5.29-0.740.4-2.126.511.994.622.81.168.022.092.355.752.530.752.325.621.372.681.778.232.391.150.724.222.862.440.588.710.830.660.269.371.530.891.15
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare ▆▅█▇█▁▅▄▅▆▃▄▄▃▄▄▄▄▄▅▄▄▄▄▄▄1.7440000000000002e-058.5e-063.7909999999999994e-052.839e-053.706e-05-2.393e-059.15e-065.26e-061.09e-051.649e-05-5.29e-06-7.4e-074.0000000000000003e-07-2.12e-065.96e-061.83e-064.9000000000000005e-062.8e-069.100000000000001e-077.860000000000001e-061.99e-062.34e-065.91e-062.57e-069.9e-072.04e-06NANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare ▆▅█▇█▁▅▄▅▆▃▄▄▃▄▄▄▄▄▅▄▄▄▄▄▄1.728e-058.380000000000001e-063.747e-052.813e-053.668e-05-2.393e-059.02e-065.21e-061.081e-051.635e-05-5.29e-06-7.4e-074.0000000000000003e-07-2.12e-065.9e-061.81e-064.87e-062.7799999999999996e-069.000000000000001e-077.79e-061.98e-062.33e-065.860000000000001e-062.5499999999999997e-069.8e-072.0299999999999996e-06NANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 Cost Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:InvestmentSegment█▁480.86941.852NANA1012.757-509.719NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:LegacyUnderwritingSegment█▁15.18912.971NANA187.722101.356NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:RunOff▁█55.87494.749NANA15.38248.778NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:InvestmentSegment█▁480.86941.852NANA1012.757-509.719NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:RunOff▁█55.87494.749NANA15.38248.778NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:AtriumSegmentNANA7.2477.15NANA4.3872.391NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:NonlifeRunoffSegmentNANA6.8743.637NANA4.624.196NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Margin from Continuing Operations us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:AtriumSegmentNANA7.2477.156.044NA4.3872.3911.533NA8.0823.242NANA5.4355.911NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Margin from Continuing Operations us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:NonlifeRunoffSegmentNANA6.8743.6373.966NA4.624.1964.645NA3.3733.708NANA13.54710.762NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Net profit Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:AtriumSegmentNANA7.2477.15NANA4.3872.3911.5331.8498.0823.2423.8653.4335.4355.911NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Net profit Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:NonlifeRunoffSegmentNANA6.8743.637NANA4.624.1964.6454.8323.3733.7084.4874.89813.54710.762NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Net profit Margin us-gaap:CounterpartyName,us-gaap:RelatedPartyTransactionsByRelatedParty esgr:EnhanzedRe,srt:AffiliatedEntity████▁████▇0.1170.1160.1790.161-3.1720.2910.3490.20.20.086NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▆▇▆█▇▄▇▇█▆▁▆▆▇6.27610.0355.44913.2589.174-0.13610.7038.80513.2915.2-11.8555.0435.0038.102NANANANANANANANA4.2822.1NANA4.4853.5NANANANANANANANANANANANANANANANANANA
us-gaap:BenefitsLossesAndExpenses ▄▄▆▆▇▆▆▇▇█▆▆▅▄▅▅▄▅▄▅▅▅▄▅▅▅▄▅▅▄▃▄▃▃▂▃▂▃▁▃▃▃▁▃▃▃144.13980.32288.734286.381399.765289.476369.52387.942413.355525.548356.463316.872252.008158.735186.621219.303175.058211.463173.441179.733272.175253.082135.996209.804232.375223.063114.947185.579233.72486.889-22.67778.29548.14960.621-56.032-20.31-28.39528.87-157.622-14.87514.24833.36-174.57.457-15.12126.063
us-gaap:ComprehensiveIncomeNetOfTax ▆▄█▇█▁▅▄▅▅▃▄▄▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄437.04493.747850.31634.526893.419-549.723204.446122.961236.684370.729-105.152-12.2677.446-40.275143.22852.44393.30156.50216.426160.24538.17361.576112.20235.00823.09727.50889.27411.53956.12430.148136.76348.1334.0489.19867.0648.62136.22713.452130.395-12.8217.79210.406125.56561.6-5.358NA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▅▆▄▆▄▁▄▅▄▄▁▄▄▅▅▃▆▆▅▆▅▅▃▄▅▅▅▄▅▅▅▅▅▅▅▅▅▅█▅▅▅▇▆▅3.2611.216-3.58822.546-9.616-36.892-5.073-0.206-2.642-2.064-42.797-11.505-8.7450.7566.302-14.43212.33318.0826.01714.3219.35310.566-19.493-2.3260.5335.6369.274-8.9223.5524.9942.794.2060.7810.8259.4447.652-0.6436.91340.6213.2627.8462.51426.45319.4223.965NA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▆▄█▇█▁▅▄▅▆▃▄▄▄▅▄▄▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▅▄▄▄▅▄▄440.304104.963846.722657.072883.803-586.615199.373122.755234.042368.665-147.949-23.772-1.299-39.519149.5338.011105.63474.58422.443174.56647.52672.14292.70932.68223.6333.14498.5482.61759.67635.142139.55352.3394.82910.02376.50456.27335.58420.365171.016-9.55825.63812.92152.01881.022-1.393NA
us-gaap:CostsAndExpenses █▁136.97761.507NANA380.589187.771NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense █▃▄▄▄▅▄▆▂▃▂▁▂▂23.7658.6989.59810.31611.06214.6310.62117.0093.9347.0633.41.5823.7185.081NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal ▁█0.014.894NANANANANANANANA0.00.00.0NA0.0-6.74-9.6090.00.00.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:DisposalGroupClassification,us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations,esgr:VanderHaeghenCOSANANA3.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:StatementScenario,us-gaap:DisposalGroupClassification,us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations,us-gaap:SubsequentEventType srt:ScenarioForecast,us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations,esgr:VanderHaeghenCOSA,us-gaap:SubsequentEventNANA3.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GainLossOnInvestments ▆▄▇▆█▁▄▄▅▆▃▄▄▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄405.22-20.788803.467500.005967.608-634.476152.664148.185269.711460.791-158.213-57.223-54.418-143.0350.63729.30151.87758.519-61.5770.42237.98737.964-57.893-15.13-11.24943.027.971-18.33638.41117.57631.4437.01-27.91911.189-0.59220.591-0.80823.0428.368-8.985.2643.3684.52710.635NANA
us-gaap:GeneralAndAdministrativeExpense ▅▅█▇█▆▇▆▇▆▆▆▆▆▇▆▆▆▇▆▆▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▂▂▂▂▁▂▁92.71783.0142.394115.828144.83113.511129.569113.924117.519112.074106.95102.553102.61295.26126.702100.325106.49102.468123.497104.991105.87836.88636.0244.89541.27238.82640.80441.03937.17722.2519.53829.12620.00217.94613.16914.40914.15614.8585.0920.75928.21117.7519.72813.18515.80110.487
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest █▁405.89215.744NANA814.08-558.243219.625123.453227.859361.719-160.066-21.5753.501-40.256112.17822.098111.3368.80535.395179.23558.25461.76978.74558.26324.02356.58896.99226.85762.761NANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▆▄█▆█▁▅▄▅▆▃▄▄▄▄▄▄▄401.78778.9731.902506.669814.08-558.243163.715123.453227.859361.719-168.554-24.892-12.144-54.953116.63827.6895.38468.805NANANA62.11481.63758.26324.02364.236108.07226.85762.76140.688164.07644.79629.7420.82993.71370.19252.75519.149185.57826.48415.9895.691212.91725.46237.39216.388
us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest ▆▅█▇█▁▅▄▅▆▃▄▄▄▄▄▄▄▄▅▄▄▄▄▄▄389.306202.913819.214641.819788.638-538.549202.53118.643241.997357.674-149.378-22.321-0.145-40.428121.80720.666106.59971.73424.167166.4847.40354.494.53946.83222.08648.915NANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▄▂▃▄▄▂▁▄▃▃▂▃▃▃▂▃▃▃▄▄▃▃▂▄▃▄▂▃▃▃▅▃▃▃▄▄▄▃▄▃▃▃█▃▄▃9.422-5.982-1.46813.91516.652-5.175-22.42714.5977.5184.749-10.6880.7463.6460.172-9.6291.4324.731-2.92911.2288.8588.4737.509-11.00412.2625.81610.744-10.2465.668.4527.27621.8931.344.5427.84413.94314.711.9053.74219.2564.4360.9750.61764.1160.97916.1155.922
us-gaap:IncomeTaxesPaidNet ▃▂▇▂▆▅▄▁▂▁▂▃█▃▃▄▃▄▄▂▄▇▆█3.5821.5649.1590.428.8546.5965.231-0.7920.5640.0091.3422.3411.4672.4612.0854.5692.6213.9174.6981.6885.14310.6878.18611.776NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestExpense ███▇▇▆▆▇▆▅▂▂▄▄▄▃▄▃▂▃▃▃▃▃▂▂▁▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▂▂▁16.30116.17916.87215.00314.01813.41513.51914.9513.03611.0364.6444.648.9228.0117.2516.417.5736.8684.7965.0275.4245.4015.3685.1564.8764.0032.3523.3073.5293.7343.5933.273.0912.4352.541.7132.0622.1112.4312.4351.6971.9662.0932.9612.8052.394
us-gaap:InterestExpenseDebt ███▇▆▆▆▇▆▅▂▁▄▃▃▂▃▂▁▂▂▂▂▂▁▁15.89615.90716.45214.65213.67513.19512.54914.93413.03610.7264.924.5528.78.0117.4356.26.86.34.5495.05.45.45.45.24.84.0NANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▅█▆▅▇▄▇▅▃▆▁▄▃▅▂12.31119.09713.510.49217.0369.74715.71512.4967.03114.2150.6228.3715.71710.533.444NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▆▅█▇█▁▅▄▅▆▃▄▄▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄386.251192.122831.524623.938807.478-507.896202.764126.668240.767367.89-106.423-10.8328.244-41.21127.59938.99390.18654.6822.645156.04840.59445.52111.85749.04214.54544.847105.9426.42951.79329.587137.46139.98719.19711.95969.90647.71640.7219.674128.75112.0649.3753.503124.29221.44312.4315.921
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▅▆▅▇▃▂▄▅▄▅▁▄▄▅▅▃▆▆▅▆▆▆▃▄▅▅▆▄▅▅▅▅▅▅▆▅▅▅█▆▅▅▇▅▆▅3.05510.7913.13121.912-19.992-32.722-4.9-0.109-2.713-2.148-42.955-11.489-8.3890.7826.206-14.83211.54217.4257.00514.3299.1879.085-19.216-3.0413.6628.64512.378-5.2322.5163.8254.7223.4696.0011.0269.8647.7760.1295.73337.5719.9845.6391.57124.5094.39111.051.695
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▆▅█▇█▁▅▄▅▆▃▄▄▃▄▄▄▄377.326183.197822.599615.013798.553-516.821193.839117.743231.842358.751-113.423-15.9658.244-41.21127.59938.99390.18654.68NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetInvestmentIncome ▆▅▅▆█▇▇▇▇▇▆▆▆▆▅▅▄▄▄▅▅▅▄▄▄▃▃▃▃▂▂▂▂▂▂▂▂▂▁▂▂▂▃▂▂▂76.14762.08961.5372.1394.44377.8479.37685.47277.73278.69668.45369.4366.46966.31958.60552.02849.41748.73942.22957.54654.22360.06351.59943.16946.49333.89331.38827.98433.64924.34823.07125.00927.25217.96316.76519.65823.39322.7839.43418.96622.92818.45230.62220.16522.99826.121
us-gaap:OperatingExpenses NANA73.66273.79377.9185.63984.84486.22180.75383.019100.02279.42576.6577.13776.66770.76970.93166.87NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:AtriumSegmentNANA4.3213.0082.8722.8774.4843.7423.1933.0335.5183.9524.134.1775.2172.507NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:NonlifeRunoffSegmentNANA53.87350.34548.56248.2160.16151.39544.20843.99244.47737.47338.37838.40335.46835.657NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:StarStoneSegmentNANA15.46820.4426.47634.55220.19931.08433.35235.99450.02738.034.14234.55735.98232.605NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▁█-0.3991.418NA1.891-1.205-0.6861.962-2.551-1.038-0.801-1.46-0.1430.1761.22514.28311.6342.3151.942-4.0632.803-4.54210.595-0.817-11.293.299-15.886-11.378-14.8154.7142.058-7.0259.053-20.278-1.2230.8673.597-3.8922.98512.368-25.52610.049NANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▆▁▅▅█▃▅▄▄▅▅▄▄▅▅▅▅▅▄▅▄▅▅▄▅▄▄▄▅▅▄▅▄▄▄▅▄▅▅▃▅50.998-97.9512.06711.22296.317-45.9971.509-3.804-4.0122.9231.429-1.451-1.1540.90915.72513.853.9062.479-7.2074.189-2.25517.5370.068-13.3195.423-20.348-19.77-18.585.3671.73-2.638.883-20.369-2.962-3.2660.781-5.2664.9584.694-31.60610.624NANANANANA
us-gaap:OtherIncome ▁▂▆█▁▄▄▂▃▂▆▃▂▄▃▁▃▃▁▂▂▂▃▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂-3.3590.55133.37248.404-1.08720.44419.5020.82611.035.81234.26711.5436.29416.649.303-3.84810.85612.198-1.2770.614.0482.4112.6482.88311.7142.9034.5782.2787.1640.022-0.081.0880.5931.3971.1380.7330.5662.5640.3951.3780.7330.536NANANANA
 us-gaap:OtherIncome us-gaap:ConsolidationItems esgr:CorporateAndReconcilingItemsNANA-2.0260.211.114-1.971-0.0881.00.7590.212-0.307-0.0040.527-0.730.4790.01NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherIncome us-gaap:ConsolidationItems us-gaap:CorporateNonSegment▁█-6.006-5.246NANA-2.016-7.439NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherIncome us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:AtriumSegmentNANA0.0260.072-0.0020.0350.0340.0350.0350.0360.0350.0070.0560.0640.0420.0690.050.0690.0550.0520.0650.0340.1060.0990.076NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherIncome us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:LegacyUnderwritingSegment█▁-2.549-6.518NANA0.030.12NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherIncome us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:NonlifeRunoffSegmentNANA31.85348.023-2.23122.29519.673-0.2859.9175.5040.98911.423-9.3342.5582.478-4.01810.76911.928-1.5251.6922.0361.8NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherIncome us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:RunOff▁█5.19612.315NANA0.89927.763NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherIncome us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,esgr:StarStoneSegmentNANA3.5180.0990.0320.085-0.1170.0760.3190.06-0.1090.117-0.60.0510.40.0910.0330.0460.0920.0931.5840.0110.466-1.1561.303NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherIncome us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:RelatedPartyTransaction esgr:AtriumSyndicate609,esgr:QuotaShareAgreement1.282NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PreferredStockDividendsIncomeStatementImpact ██████████▆▅▁▁▁▁▁▁8.9258.9258.9258.9258.9258.9258.9258.9258.9259.1397.05.1330.00.00.00.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PremiumsEarnedNet ▂▃▃▄▄▆▇▇▇█▆▇▆▅▄▄▄▄▆▆▆▅▅▆▅▅▅▅▆▂▃▂▃▂▁▁▁59.64492.876108.146161.724142.871259.897272.686270.325276.563335.287231.947264.597228.812170.219160.627148.025155.571148.898216.188223.395226.928209.409197.091231.051212.023198.906171.889195.987216.91661.65873.87658.67475.59631.6610.8190.8220.896NANANANANANANANANA
us-gaap:ProfitLoss ▆▅█▇█▁▅▄▅▆▃▄▄▄▄▄▄▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▅▄▄▄▅▄▄▄389.306202.913834.655645.85787.486-540.618197.864126.559238.054365.742-149.378-22.321-0.145-40.428133.80524.161101.72872.10529.65170.37749.78154.60592.64146.00118.20753.492118.31821.19754.30933.412142.18343.45625.19812.98579.7755.49240.8515.407166.32222.04815.0145.074148.80125.83423.4817.616
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▅█▇▇▅▆▆▇▅▅▇▃▄▃▂▂▂▂▁▂▁▁▁▂▂▂▁▂8.2749.59814.12110.78710.017.5289.0076.5876.1786.68111.4556.958.3528.33119.62715.89518.66711.914208.836358.968330.429315.196217.633268.067256.398287.299223.019212.436296.485127.577133.399123.09177.88981.4537.68149.88224.3648.01927.95611.60930.23739.05138.41732.91922.27142.451
us-gaap:Revenues ▅▃▇▆█▁▅▅▅▆▃▄▃▃▄▃▄▄▃▄▄▄▃▄▃▄▃▃▄▃▃▃▃▃▂▃▂▂▂▂▂▂▂▂▂▂545.926159.221020.636793.051213.845-268.767533.235511.395641.214887.267187.909295.297255.509118.479298.799241.401286.388280.268208.836358.968330.429315.196217.633268.067256.398287.299223.019212.436296.485127.577133.399123.09177.88981.4537.68149.88224.3648.01927.95611.60930.23739.05138.41732.91922.27142.451
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets █▇▇▇▇▆▆▆▆▆▅▅▅▅▄▄▄▄▄▄▄▄▃▃▄▃▃▃▃▂▂▂▂▂▁▁▁▁▂▂▁24621.33122059.79221647.28421770.58821293.91519131.50919363.31518213.35418224.84218058.25116556.2715121.22815203.21215611.65213606.42214759.4314830.77114882.87712865.74412470.9212659.16612850.3511832.13212053.6112332.3611509.1729936.88510249.44510618.0968709.3078620.1558342.2697874.7488043.9265882.2435908.476030.9416459.7836606.1386775.6115200.761NA5235.904NANANA
us-gaap:Liabilities █▇▇▇▇▇▆▆▆▆▅▅▅▅▄▅▅▅▄▄▄▄▄▄▄▃▃▃▃▂▂▂▂▂▁▁▁▁▂▂▁17243.93915111.55814593.84415558.50415726.91614448.73214068.17313128.07713261.70713321.74112183.73810747.22310804.97112021.5749980.86811287.25611401.48211535.739600.399234.4449600.0559839.578893.6869211.6539504.4028576.7727039.4467445.7897806.5296334.0966541.7736466.3586084.5276259.4314107.014164.2814343.8654794.1684922.7275438.0943854.522NA4020.083NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▇▇▆▆▆▆▆▅▅▅▅▄▄▄▄▄▄▄▄▃▃▄▃▃▃▃▂▂▂▂▂▁▁▁▁▂▂▁24621.33122059.79221647.28421770.58821293.91519131.50919363.31518213.35418224.84218058.25116556.2715121.22815203.21215611.65213606.42214759.4314830.77114882.87712865.74412470.9212659.16612850.3511832.13212053.6112332.3611509.1729936.88510249.44510618.0968709.3078620.1558342.2697874.7488043.9265882.2435908.476030.9416459.7836606.1386775.6115200.761NA5235.904NANANA
us-gaap:StockholdersEquity ██▇▆▆▅▅▅▅▅▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁7187.3086760.7766674.3955820.8855186.9134276.5994842.1834637.84514.834267.7123901.9333905.3643917.4213100.0353136.6843021.3452962.2252864.8662802.3122777.4542615.8142577.7642516.8722438.0742398.812334.1752304.852214.2582199.811786.5581755.5231617.8831568.8771563.9321553.7551487.2741437.8131400.7391386.0661072.6941084.678NA948.421NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ▄▂▆▃▃▅▃▅█▃▂▁▅▃▆▂▃▆▆▄▅▄▅▇█▇▇▆▇▃▃▁▂▃▃▃▃▄▅▄▄▂▅▅▄769.359562.328901.152640.601651.855815.878703.085832.6081073.485718.05602.096553.419819.709652.827955.15624.451681.068921.562954.871769.039800.846746.053821.9251026.0521076.959982.501963.402921.6151028.155645.823643.841520.56616.897640.356654.89644.355672.883792.815850.474762.577759.724630.386799.154823.777723.735NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents █▁▄▂▁▂▂▃▄▂▁▁▂▂▃▁▂▃▃▃▂2128.795995.6931373.1161197.322988.5211160.9751055.7771340.9131523.7851145.651982.5841028.0091183.5931135.9631212.836949.3561104.7511313.9751318.6451228.3051200.844NA1295.169NANANA1429.622NANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AmortizationOfIntangibleAssets NANA0.00.5080.5080.5080.5810.5460.5650.565NANANANANANANANANANANA0.13.8025.403-4.91.341-24.74824.17.91.5-0.915.14.92.1NANANANANANANANANANANANA
us-gaap:Goodwill NANA62.95962.959101.807114.807114.807114.807114.807114.807114.807114.807114.80773.07173.07173.07173.07173.07173.07173.07173.07173.07173.07173.07173.07173.07173.07173.07173.07160.07160.0721.22221.22221.22221.22221.22221.22221.22221.22221.22221.222NA21.222NANANA
 us-gaap:Goodwill us-gaap:StatementBusinessSegments esgr:NonlifeRunoffSegmentNANA62.95962.95962.959NA62.959NANANA62.959NANANA21.2NANANA21.2NANANA21.221.221.221.221.221.221.221.221.2NANANA21.2NANANANANANANANANANANA
us-gaap:IntangibleAssetsNetIncludingGoodwill NANA62.95962.959178.552215.96216.468217.049217.595218.16218.725219.295219.865179.363180.589181.831182.504183.685184.855186.343187.555187.888191.304192.752198.155199.809201.15202.986204.952149.394150.071NANANA21.222NANANA21.222NANANANANANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA138.663NANANA154.91NANANANANANANANANANANANANANANA28.44754.46554.09251.57750.50634.27834.17832.08934.29541.47841.711NA-0.525NANANA9.888NANANA3.156NANANA
 us-gaap:DeferredTaxAssetsLiabilitiesNet us-gaap:StatementGeographical country:USNANA156.73NANANA169.891NANANA5.151NANANA4.947NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DeferredTaxAssetsLiabilitiesNet us-gaap:StatementGeographical esgr:OtherJurisdictionsNANA0.028NANANA1.093NANANA2.808NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▁▄▄▅▅▇▇██22.21924.07832.29733.22436.61339.346.74745.17447.02648.87NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EquitySecuritiesFvNi ██▆▅▄▄▅▅▄▃▃▁▁1158.2191098.568846.795653.159640.771641.85729.721728.426522.038400.42367.125130.314130.404NA106.603NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:OperatingLeaseLiabilityCurrent ▁▁▃▃▅▇█6.0476.3027.9597.9558.83610.46711.403NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt ▇▇▇▇██▆▆█▅▄▁▁▄▃▃▃▃▃▂▂▂▂1364.2121363.5151373.2591447.9081542.0221541.5541191.2071210.6751497.4471103.79861.539394.47439.61860.507646.689653.454640.787730.845673.603570.618614.03580.614600.25NA650.507429.998320.041320.233386.212485.239452.446355.663347.903346.97107.43127.158126.312243.101242.71314.569205.636NA245.278NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet NANANA6.49316.55911.43416.0749.159.1189.20410.54214.94214.98314.80715.26222.33922.39323.26528.35693.93694.67692.84692.588NANANA43.958NANANANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterest ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▆▆▆▇▆▆▆▆▆▆▇▇▇█▇▇12.63512.65513.60914.46813.55313.40514.16812.6912.60912.45212.05610.3139.7279.2769.26410.4879.4189.2178.523.4773.6413.893.91120.56934.118215.039217.97223.767258.044227.32222.0225.521221.344220.563221.478256.915249.263264.876297.345264.823261.561NA267.4NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▂▅▅▆▆█19.12220.54327.06428.12629.62931.31934.785NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▁▁█▇5.7035.7788.0997.829NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▁▁█▇4.0474.1367.2677.032NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▁▁█▇3.1653.1645.5615.328NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA4.534NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA8.577NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ██▇▆▆▅▅▅▅▅▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁7187.3086760.7766674.3955820.8855186.9134276.5994842.1834637.84514.834267.7123901.9333905.3643917.4213100.0353136.6843021.3452962.2252864.8662802.3122777.4542615.8142577.7642516.8722438.0742398.812334.1752304.852214.2582199.811786.5581755.5231617.8831568.8771563.9321553.7551487.2741437.8131400.7391386.0661072.6941084.678NA948.421NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest █▇▇▆▆▅▅▅▅▅▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁7199.9436773.4316688.0045835.3535200.4664290.0044856.3514650.494527.4394280.1643913.9893915.6773927.1483109.3113145.9483031.8322971.6432874.0832810.8322780.9312619.4552581.6542520.7832458.6432432.9282549.2142522.822438.0252457.8542013.0781977.5231843.4041790.2211784.4951775.2331744.1891687.0761665.6151683.4111337.5171346.239NA1215.821NANANA
 us-gaap:CommonStockValue us-gaap:ConsolidatedEntities,us-gaap:StatementClassOfStock srt:ParentCompany,esgr:CommonClassENANA0.91NANANA0.91NANANA0.91NANANA0.405NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockValue us-gaap:ConsolidatedEntities,us-gaap:StatementClassOfStock srt:ParentCompany,esgr:VotingCommonStockNANA18.576NANANA18.002NANANA17.95NANANA16.402NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock esgr:CommonClassE█████████████▁▁▁▁▁▁0.910.910.910.910.910.910.910.910.910.910.910.910.910.4050.4050.4050.4050.4050.405NANANA0.405NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock esgr:VotingCommonStock██████▆▆▆▆▆▆▆▂▂▂▂▂▁▁▁▁▁18.57118.59618.57618.5618.63518.6118.00217.98117.97517.95817.9517.93417.9316.41316.40216.39116.38616.38116.17516.17116.16716.16316.133NANANA15.761NANANANA13.80113.813.79913.75213.71313.71213.7113.66513.52113.52NA12.94NANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassC▄▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▆▆2.692.692.62.62.62.62.62.62.62.62.62.62.62.62.62.62.62.62.7922.7262.726NA2.726NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AdditionalPaidInCapital █████████████▁▁▁▁▁▁▁▁1835.2311836.7921836.0741832.131835.1151825.7981836.7781830.5071822.2021809.1071804.6641812.7271808.0631400.6241395.0671391.2291386.3321382.4211380.1091379.3891376.59NA1373.044NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▇▇▆▅▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁5208.5654831.2394647.3123816.5483190.1042375.0732887.8922691.4822573.1172335.0281976.5392083.1932098.4842089.762132.9122037.0511996.2831905.9561847.551817.2661662.6231622.9571578.3121503.641454.5981440.0531395.2061289.2661262.8371211.0441181.4571043.9961004.009984.812972.853902.947855.23814.51804.836676.085664.021NA651.143NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▂█▇▆▁▄▃▄▄▄▄▄▄▄▃▂▂▂▂▂▂▁▁▂▁▂▃▄▄▄▄▄▄▅▅▅▅▅▅▆33.077-17.71580.65961.87351.285-34.6567.1715.499.19613.27910.449.1710.60411.40310.468-5.161-18.611-21.727-23.549-17.333-21.527-19.104-35.162-35.507-21.473-30.025-12.6863.9818.8714.53813.97814.6766.52921.67824.43927.28326.3830.87527.09625.45350.336NA35.017NANANA
us-gaap:MinorityInterest ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▆▆▆▇▆▆▆▆▆▆▇▇▇█▇▇12.63512.65513.60914.46813.55313.40514.16812.6912.60912.45212.05610.3139.7279.2769.26410.4879.4189.2178.523.4773.6413.893.91120.56934.118215.039217.97223.767258.044227.32222.0225.521221.344220.563221.478256.915249.263264.876297.345264.823261.561NA267.4NANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents esgr:VotingCommonStock,us-gaap:CommonStock▁▁▁▁▁▄▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁0.0050.0380.020.0060.0250.7010.0210.0060.0170.0080.0160.0041.5170.0110.0110.0050.0050.0140.0040.0040.0040.030.0050.0040.0040.05NANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents esgr:JointOwnershipPlanVotingOrdinarySharesNANA0.00.00.0-0.566NANA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapitalNANANA0.503-0.109-1.251-0.9140.5760.4550.466-0.5380.475413.298-0.094-0.1970.581NANANANANANANANANANANANANANANANANANANANA0.1280.152NANA105.1840.126NANANANA
 us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▅▆▅▇▇▄▆▆█▄▁▄▅▅▄▄▄▄▃▃▃▃▄▃5.9287.2674.5159.2949.4262.7047.1857.72912.643.977-3.6634.4524.6595.6514.0354.3163.3342.8231.2142.1360.3640.2383.3631.683NANANANANANANANANANANANANANANA0.0NANANA0.0NANA
 us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest0.634NANANANANANANANANANANANANANANANANA0.00.0NANA0.00.41NANA4.2NANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities NANANA1254.869691.049158.1121123.282544.563-11.467107.138-251.027203.505-38.336-74.214139.139-219.697-168.41-94.13935.48-21.837-65.037-151.295272.299-59.406NANANANANANA63.213-114.177-22.01510.59268.779-69.574-172.508-14.047-226.38-210.799-182.387-290.35420.94165.491NANA
 us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities us-gaap:VariableInterestEntityPrimaryBeneficiary1228.456NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities NANANA-854.895-767.959-388.18-1404.497-425.23719.204-173.007-414.402-306.351125.228-230.229129.05843.00877.55243.644-64.42939.81493.95487.37-332.14991.881NANANANANANA-102.22-8.6815.786-270.67531.21850.51171.937-25.034195.96109.87201.664184.42919.873117.917NANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities us-gaap:VariableInterestEntityPrimaryBeneficiary574.081NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities █▁-16.767-23.15NA-117.001-8.925328.549-16.104-296.127372.908232.861617.648-50.2-26.973212.511-7.9379.319-122.95856.1115.643-45.7534.048-20.5-129.0-79.328NANANANANANA157.04140.7750.0225.26-91.6770.0-130.846-11.25102.914106.718106.837-56.7-66.316-87.944NANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities us-gaap:VariableInterestEntityPrimaryBeneficiary-800.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▁▄▄▃▄▂▃▅▄▃▃▄▃▄▃▃▃▄▄1133.102-600.623263.929259.439-88.026105.198-285.136-182.872378.134163.067-45.425-155.58447.63-76.873263.48-161.714-202.905-4.6790.3427.461NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AmortizationOfFinancingCosts ▆▂█▆▅▁█▄▃▃0.3490.2560.4170.3510.3430.220.4140.3110.2820.273NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization ▅▄▄▃▄▃▃▃▂▂▂▂▃▂▂▃▃▃▁▃▃▃▃█▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁20.22717.77817.3612.20418.61311.39310.7848.8518.0487.98.0197.68310.896.7033.53610.1289.4959.302-0.51111.12910.69113.62912.539.9151.3231.4212.711.0631.8080.2110.2940.2560.2510.2540.4650.3730.3140.3170.3990.4230.3870.3840.4630.679NANA
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▅▇▂▂▂▆▃▅▅▄▃▄▇▇▄▂▄▄█▁▆▅▆▆35.875219.133-201.915-155.235-154.376122.039-85.33332.61518.524-19.441-125.067-48.935219.087200.224-45.303-214.4677.447-8.345275.285-255.21886.45144.55102.351157.538NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities NANANA1254.869691.049158.1121123.282544.563-11.467107.138-251.027203.505-38.336-74.214139.139-219.697-168.41-94.13935.48-21.837-65.037-151.295272.299-59.406NANANANANANA63.213-114.177-22.01510.59268.779-69.574-172.508-14.047-226.38-210.799-182.387-290.35420.94165.491NANA
 us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities us-gaap:VariableInterestEntityPrimaryBeneficiary1228.456NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▆▅█▇█▁▅▄▅▆▃▄▄▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄386.251192.122831.524623.938807.478-507.896202.764126.668240.767367.89-106.423-10.8328.244-41.21127.59938.99390.18654.6822.645156.04840.59445.52111.85749.04214.54544.847105.9426.42951.79329.587137.46139.98719.19711.95969.90647.71640.7219.674128.75112.0649.3753.503124.29221.44312.4315.921
us-gaap:ProfitLoss ▆▅█▇█▁▅▄▅▆▃▄▄▄▄▄▄▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▅▄▄▄▅▄▄▄389.306202.913834.655645.85787.486-540.618197.864126.559238.054365.742-149.378-22.321-0.145-40.428133.80524.161101.72872.10529.65170.37749.78154.60592.64146.00118.20753.492118.31821.19754.30933.412142.18343.45625.19812.98579.7755.49240.8515.407166.32222.04815.0145.074148.80125.83423.4817.616
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities NANANA-854.895-767.959-388.18-1404.497-425.23719.204-173.007-414.402-306.351125.228-230.229129.05843.00877.55243.644-64.42939.81493.95487.37-332.14991.881NANANANANANA-102.22-8.6815.786-270.67531.21850.51171.937-25.034195.96109.87201.664184.42919.873117.917NANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities us-gaap:VariableInterestEntityPrimaryBeneficiary574.081NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquireInvestments NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireInvestments dei:LegalEntity esgr:TridentNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:StatementScenario esgr:EnhanzedRe,srt:ScenarioForecastNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▁-16.767-23.15NA-117.001-8.925328.549-16.104-296.127372.908232.861617.648-50.2-26.973212.511-7.9379.319-122.95856.1115.643-45.7534.048-20.5-129.0-79.328NANANANANANA157.04140.7750.0225.26-91.6770.0-130.846-11.25102.914106.718106.837-56.7-66.316-87.944NANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities us-gaap:VariableInterestEntityPrimaryBeneficiary-800.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▁▁▁▆▁▅▁▁█▄█▂▁▄▄▁▂▅▅▁▃▁▂▃▄▂▁▁▁▂▂▁▁▃0.020.0-0.276494.7880.0364.0-0.30620.002706.806344.0691.48566.95328.669345.4340.045.052.0437.1417.00.0154.0480.0120.0163.0265.7109.00.00.00.070.095.047.80.0227.0NANANANA0.0106.5NANA115.025.0NANA
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType esgr:JuniorSubordinatedNotesDue2040,us-gaap:JuniorSubordinatedDebtNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▁▁▂█▁▁▁▅▅▂▄▂▆▃▅▁▃▆▅▂▂▁▄▂▂▁▁▂0.030.075.0590.00.014.020.0307.204313.37102.0224.5111.757445.124132.938347.93735.703147.5381.0307.045.75120.020.5249.082.546.00.00.065.995NANA0.0NANANA18.6660.0NANA70.4420.0NANA132.667NANANA
 us-gaap:RepaymentsOfLongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType esgr:A2018EGLTermLoanFacility,us-gaap:LineOfCreditNANANA350.0NANANA100.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▅▃▁█▁█7.24.2250.61612.8640.012.526NANA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities, us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

srt:ParentCompany, esgr:CommonClassE


Common
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.910.910.910.405
Percentage of CommonStockValue100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0
Percentage of Assets srt:ParentCompany esgr:CommonClassE0.00.00.00.0

srt:ParentCompany, esgr:VotingCommonStock


Common
Period End2020-12-312019-12-312018-12-312017-12-31
Value18181716
Percentage of CommonStockValue2041.31978.21972.54049.9
Percentage of Assets0.10.10.10.1
Percentage of Assets srt:ParentCompany esgr:VotingCommonStock0.00.00.00.0

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

esgr:CommonClassE


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value0.910.910.910.910.910.910.910.910.910.910.910.910.910.4050.4050.4050.4050.4050.4050.405
Percentage of CommonStockValue0.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets esgr:CommonClassE0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

esgr:VotingCommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1818181818181817171717171716161616161616161616151313131313131313131312
Percentage of CommonStockValue0.00.02041.30.00.00.01978.20.00.00.01972.50.00.00.04049.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.30.2
Percentage of Assets esgr:VotingCommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassC


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value2.692.692.62.62.62.62.62.62.62.62.62.62.62.62.62.62.62.62.7922.7262.7262.726
Percentage of CommonStockValue0.00.0285.70.00.00.0285.70.00.00.0285.70.00.00.0642.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value21212121212121212120191919191919191919191919161616161616161414131414
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value21212121212121212120191919191919191919191918161616161616161413121313
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value17.448.538.2428.537.03-23.989.025.4810.7916.71-5.29-0.740.4-2.126.582.014.652.821.178.092.12.365.82.550.762.335.661.382.781.798.322.421.160.724.252.92.480.598.890.850.670.279.611.560.911.17
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value17.288.3837.7928.2436.65-23.988.895.4210.716.57-5.29-0.740.4-2.126.511.994.622.81.168.022.092.355.752.530.752.325.621.372.681.778.232.391.150.724.222.862.440.588.710.830.660.269.371.530.891.15
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value17.448.537.9128.3937.06-23.939.155.2610.916.49-5.29-0.740.4-2.125.961.834.92.80.917.861.992.345.912.570.992.04
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value17.288.3837.4728.1336.68-23.939.025.2110.8116.35-5.29-0.740.4-2.125.91.814.872.780.97.791.982.335.862.550.982.03
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302014-12-312014-09-30
Value6.276105.449139.174-0.136108.805135.2-11.8555.0435.0038.1024.2822.14.4853.5
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.9104.638.6122.991.6-1.8118.8133.7215.177.8-103.572.659.997.32.00.82.01.6

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

esgr:RestrictedStockandRestrictedStockUnits


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.7141.2952.1062.2512.331.5991.6541.7781.2891.8431.4921.82.02.349
Percentage of AllocatedShareBasedCompensationExpense27.312.938.617.025.4-1175.715.520.29.735.4-12.635.740.029.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.713.514.920.923.321.218.427.020.927.613.025.923.928.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:RestrictedStockandRestrictedStockUnits0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EmployeeStock


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-30
Value0.0810.0850.0210.110.1040.1040.1020.1020.1040.1030.1050.1150.1270.0830.10.10.10.10.10.10.10.1
Percentage of AllocatedShareBasedCompensationExpense1.30.80.40.81.1-76.51.01.20.82.0-0.92.32.51.00.00.00.00.00.00.04.80.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.90.11.01.01.41.11.51.71.50.91.71.51.00.60.50.80.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EmployeeStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PerformanceShares


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.9953.8951.7925.6985.855-0.6675.4495.678111.325-5.372.4162.4472.475
Percentage of AllocatedShareBasedCompensationExpense47.738.832.943.063.8490.450.964.583.725.545.347.948.930.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.240.612.752.858.5-8.960.586.2180.219.8-46.934.829.329.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:PerformanceShares0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockAppreciationRightsSARS


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.2452.768-0.0153.705-0.316-3.1592.6840.102-0.2670.056-4.214-0.350.0071.241
Percentage of AllocatedShareBasedCompensationExpense3.927.6-0.327.9-3.42322.825.11.2-2.01.135.5-6.90.115.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.028.8-0.134.3-3.2-42.029.81.5-4.30.8-36.8-5.00.114.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StockAppreciationRightsSARS0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType, us-gaap:PlanName

esgr:TimeBasedRestrictedStock, esgr:LongTermIncentivePlans


Allocated
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-03-312015-03-31
Value0.3150.209-0.0250.4720.5911.0290.9861.0460.4020.9430.3391.1087.37.9
Percentage of AllocatedShareBasedCompensationExpense5.81.6-0.3-347.15.511.77.420.1-3.418.76.813.70.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.21.9-0.26.36.615.616.015.73.513.64.113.32.32.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:TimeBasedRestrictedStock esgr:LongTermIncentivePlans0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

esgr:TimeBasedRestrictedStock, esgr:StarStoneLongTermIncentivePlan


Allocated
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.00.0-0.2230.00.0
Percentage of AllocatedShareBasedCompensationExpense0.00.00.0164.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.0-3.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:TimeBasedRestrictedStock esgr:StarStoneLongTermIncentivePlan0.00.00.00.00.00.0

us-gaap:EmployeeStock, esgr:EmployeeStockPurchasePlan


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value1.1331.1211.1451.1461.1330.8720.00.0
Percentage of AllocatedShareBasedCompensationExpense18.111.221.08.612.4-641.20.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.711.78.110.611.311.60.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EmployeeStock esgr:EmployeeStockPurchasePlan0.00.00.00.00.00.00.00.0

Benefits Losses And Expenses

us-gaap:BenefitsLossesAndExpenses

us-gaap:BenefitsLossesAndExpenses


Benefits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1448028828639928936938741352535631625215818621917521117317927225313520923222311418523386-22.677784860-56.032-20.31-28.39528-157.622-14.8751433-174.57.457-15.12126
Percentage of BenefitsLossesAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1742.1836.82044.72654.93993.73845.34102.65889.56690.87866.33111.94559.33017.31905.4950.81379.7937.81774.983.150.182.480.362.578.390.677.651.587.478.868.1-17.063.661.874.4-148.7-40.7-116.660.1-563.8-128.147.185.4-454.222.7-67.961.4

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value43793850634893-549.723204122236370-105.152-12.2677.446-40.27514352935616160386111235232789115630136484.0489.19867483613130-12.82171012561-5.358
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5282.1976.76021.65882.38925.3-7302.42269.91866.73831.15549.0-918.0-176.589.2-483.4729.7329.9499.8474.27.944.611.619.551.613.19.09.640.05.418.923.6102.539.15.211.3178.097.5148.728.0466.4-110.458.826.6326.8187.1-24.1

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.2611-3.58822-9.616-36.892-5.073-0.206-2.642-2.064-42.797-11.505-8.7450.7566.302-14.43212186.017149.35310-19.493-2.3260.5335.6369.274-8.9223.5524.9942.794.2060.7810.8259.4447.652-0.6436.913403.2627.8462.51426193.965
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.4116.9-25.4209.0-96.1-490.1-56.3-3.1-42.8-30.9-373.6-165.5-104.79.132.1-90.866.1151.82.94.02.83.4-9.0-0.90.22.04.2-4.21.23.92.13.41.01.025.115.3-2.614.4145.328.125.96.468.959.017.8

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value440104846657883-586.615199122234368-147.949-23.772-1.299-39.519149381057422174477292322333982.6175935139524.8291076563520171-9.558251215281-1.393
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5321.51093.65996.26091.38829.2-7792.42213.51863.63788.35518.1-1291.6-342.0-15.6-474.4761.9239.1565.9626.010.748.614.422.942.612.29.211.544.21.220.127.5104.642.56.212.3203.0112.8146.142.4611.7-82.384.833.1395.7246.1-6.3

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-06-302020-03-31
Value13661380187
Percentage of CostsAndExpenses100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1655.5640.83802.12494.3

us-gaap:CostsAndExpenses us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Costs
Period End2021-06-302021-03-312020-06-302020-03-31
Value60-14.82516310
Percentage of CostsAndExpenses44.4-24.142.95.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax735.8-154.51629.9137.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:CostsAndExpenses us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:InvestmentSegment


Costs
Period End2021-06-302021-03-312020-06-302020-03-31
Value123.54103.564
Percentage of CostsAndExpenses9.05.82.81.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax148.736.9106.947.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:InvestmentSegment0.00.00.00.0

us-gaap:OperatingSegments, esgr:LegacyUnderwritingSegment


Costs
Period End2021-06-302021-03-312020-06-302020-03-31
Value1611210170
Percentage of CostsAndExpenses12.118.855.490.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax200.9120.22107.12267.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:LegacyUnderwritingSegment0.00.03489.86713.5

us-gaap:OperatingSegments, esgr:RunOff


Costs
Period End2021-06-302021-03-312020-06-302020-03-31
Value4761-4.1943.101
Percentage of CostsAndExpenses34.499.6-1.11.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax570.2638.2-41.941.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:RunOff570.2638.2-105.762.2

Deferred Policy Acquisition Cost Amortization Expense

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value238.6989.59810111410173.9347.0633.41.5823.7185.081
Percentage of DeferredPolicyAcquisitionCostAmortizationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax287.290.668.095.6110.5194.3117.9258.263.7105.729.722.844.561.0

Disposal Group Not Discontinued Operation Gain Loss On Disposal

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal


Disposal
Period End2021-06-302021-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.0140.00.00.00.0-6.74-9.6090.00.00.00.00.0
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal0.0100.00.00.00.00.0100.0100.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0155.20.00.00.00.0-42.4-51.50.00.00.00.00.0

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, esgr:VanderHaeghenCOSA


Disposal
Period End2020-12-31
Value3.4
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations esgr:VanderHaeghenCOSA0.0

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:StatementScenario, us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:SubsequentEventType

srt:ScenarioForecast, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, esgr:VanderHaeghenCOSA, us-gaap:SubsequentEvent


Disposal
Period End2020-12-31
Value3.6
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ScenarioForecast us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations esgr:VanderHaeghenCOSA us-gaap:SubsequentEvent0.0

Gain Loss On Investments

us-gaap:GainLossOnInvestments

us-gaap:GainLossOnInvestments


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value405-20.788803500967-634.476152148269460-158.213-57.223-54.418-143.0350295158-61.57703737-57.893-15.13-11.249437.971-18.33638173137-27.91911-0.59220-0.808238.368-8.985.2643.3684.52710
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4897.5-216.65689.94635.39666.4-8428.21694.92249.74365.76897.0-1381.2-823.4-651.6-1716.8258.0184.3277.9491.2-29.519.611.512.0-26.6-5.6-4.415.03.6-8.613.013.823.630.1-35.813.7-1.641.3-3.348.029.9-77.417.48.611.832.3

us-gaap:GainLossOnInvestments us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Gain
Period End2021-06-302020-06-30
Value216365
Percentage of GainLossOnInvestments53.537.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2619.43646.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.00.0

us-gaap:GainLossOnInvestments us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0.7731.5337.567-5.7080.7310.5821.9692.913-1.3620.194-0.68-1.403-0.060.2850.4740.418-0.671-0.0380.0680.040.0960.0270.038
Percentage of GainLossOnInvestments0.10.30.80.90.50.40.70.60.9-0.31.21.0-0.11.00.90.71.1-0.10.20.1-0.2-0.2-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.514.275.6-75.88.18.831.943.6-11.92.8-8.1-16.8-0.31.82.53.5-0.3-0.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.021.4125.2-224.50.024.3128.4157.50.06.0-17.6-40.90.04.80.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:InvestmentSegment


Gain
Period End2021-06-302021-03-312020-06-302020-03-31
Value405-19.479926-574.682
Percentage of GainLossOnInvestments99.993.795.890.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4895.0-202.99255.7-7633.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:InvestmentSegment0.00.00.00.0

us-gaap:OperatingSegments, esgr:LegacyUnderwritingSegment


Gain
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.21-1.30941-54.379
Percentage of GainLossOnInvestments0.16.34.28.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.5-13.6410.7-722.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:LegacyUnderwritingSegment0.00.0680.2-2138.4

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value789486926-574.682152138241436-150.883-58.506-46.027-126.29652255051-42.236702623
Percentage of GainLossOnInvestments98.297.395.890.699.993.289.694.795.4102.284.688.3103.585.497.588.168.699.968.961.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5587.74511.69255.7-7633.91692.62097.73909.76528.8-1317.2-841.8-551.1-1516.0267.1157.4270.8432.8-20.219.67.97.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.013381.123360.9-11528.20.03293.05200.09027.00.0-1577.8-1025.8-2578.50.0232.40.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:StarStoneSegment


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value131133-54.086-0.5159.1592120-2.5220.989-3.181-12.958-2.345.0457.2096.699-16.366-0.2768.02114-7.938-3.193-3.3554.7021.533-2.615
Percentage of GainLossOnInvestments1.72.43.58.5-0.36.28.04.51.6-1.75.89.1-4.617.213.911.426.6-0.421.137.813.721.129.810.919.214.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax96.7109.4335.1-718.5-5.7139.0350.5309.2-22.014.2-38.1-155.5-11.931.738.656.2-7.8-0.12.44.6-3.6-1.2-1.31.60.7-1.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GainLossOnInvestments us-gaap:CounterpartyName

esgr:AnglePoint


Gain
Period End2021-06-30
Value216
Percentage of GainLossOnInvestments53.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2619.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AnglePoint0.0

esgr:Hillhouse


Gain
Period End2021-03-312020-03-31
Value97-64.704
Percentage of GainLossOnInvestments-468.910.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1015.6-859.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:Hillhouse0.00.0

esgr:StonePointAndAffiliatedEntities


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2224603529-102.5160.326-3.4429.56420-16.588.7833.999
Percentage of GainLossOnInvestments5.5-119.87.57.23.116.20.2-2.33.54.410.5-15.3-7.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax269.7259.6429.2333.0297.0-1361.83.6-52.3154.8301.3-144.7126.447.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:StonePointAndAffiliatedEntities0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GainLossOnInvestments us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:AmTrustFinancialServicesInc., srt:AffiliatedEntity


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-1.453-1.492-15.0370.0453.954-0.10.00.0
Percentage of GainLossOnInvestments-0.47.2-1.90.00.40.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17.6-15.5-106.50.439.5-1.30.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AmTrustFinancialServicesInc. srt:AffiliatedEntity0.00.00.00.00.00.00.00.0

esgr:EnhanzedRe, srt:AffiliatedEntity


Gain
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.1490.017-0.061-0.679
Percentage of GainLossOnInvestments0.0-0.1-0.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.80.2-0.4-6.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:EnhanzedRe srt:AffiliatedEntity0.00.00.00.0

us-gaap:GainLossOnInvestments us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest


Gain
Period End2021-06-302021-03-312020-06-302020-03-31
Value5.72-11.94413-12.118
Percentage of GainLossOnInvestments1.457.51.31.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.1-124.4130.0-161.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.0

us-gaap:GainLossOnInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

esgr:AtriumSyndicate609


Gain
Period End2021-03-31
Value-1.289
Percentage of GainLossOnInvestments6.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-13.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate6090.0

us-gaap:GainLossOnInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

esgr:AtriumSyndicate609, esgr:QuotaShareAgreement


Gain
Period End2021-06-30
Value0.21
Percentage of GainLossOnInvestments0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate609 esgr:QuotaShareAgreement0.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value92831421151441131291131171121061021029512610010610212310410536364441384041372219292017131414145.0920281719131510
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1120.6864.81008.41073.81446.91507.91438.51729.51902.21677.5933.71475.61228.61143.4645.5631.2570.5860.159.129.232.011.716.616.716.113.518.319.312.517.414.623.725.722.034.928.958.130.918.2178.893.345.551.440.170.924.7

us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


General
Period End2021-06-302021-03-312020-06-302020-03-31
Value14491145
Percentage of GeneralAndAdministrativeExpense16.060.08.040.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax179.6518.7115.9603.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:InvestmentSegment


General
Period End2021-06-302021-03-312020-06-302020-03-31
Value123.54103.564
Percentage of GeneralAndAdministrativeExpense13.34.37.43.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax148.736.9106.947.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:InvestmentSegment0.00.00.00.0

us-gaap:OperatingSegments, esgr:LegacyUnderwritingSegment


General
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.4182.0847026
Percentage of GeneralAndAdministrativeExpense1.52.548.423.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.121.7699.9346.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:LegacyUnderwritingSegment0.00.01159.21024.7

us-gaap:OperatingSegments, esgr:RunOff


General
Period End2021-06-302021-03-312020-06-302020-03-31
Value64275223
Percentage of GeneralAndAdministrativeExpense69.233.236.220.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax775.2287.5524.1310.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:RunOff775.2287.51322.9469.1

us-gaap:GeneralAndAdministrativeExpense us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

esgr:AtriumSyndicate609


General
Period End2021-03-31
Value2.084
Percentage of GeneralAndAdministrativeExpense2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate6090.0

us-gaap:GeneralAndAdministrativeExpense us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

esgr:AtriumSyndicate609, esgr:QuotaShareAgreement


General
Period End2021-06-30
Value1.418
Percentage of GeneralAndAdministrativeExpense1.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate609 esgr:QuotaShareAgreement0.0

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value405215814-558.243219123227361-160.066-21.5753.501-40.256112221116835179586178582456962662
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4905.62247.88132.7-7415.62438.41874.23688.25414.1-1397.3-310.441.9-483.2571.5139.0596.4577.516.949.917.619.636.221.79.419.743.512.621.2

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value-66.88424-165.173-17.82
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-16.511.3-20.33.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-808.4255.0-1650.1-236.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:InvestmentSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value465156993-500.833
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest114.772.5122.089.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5626.11628.99922.7-6652.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:InvestmentSegment0.00.00.00.0

us-gaap:OperatingSegments, esgr:LegacyUnderwritingSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value-1.4321.432-23.2-69.369
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-0.40.7-2.812.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17.314.9-231.8-921.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:LegacyUnderwritingSegment0.00.0-383.9-2727.8

us-gaap:OperatingSegments, esgr:RunOff


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value8.699331945
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest2.115.52.4-8.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax105.1349.0195.6606.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:RunOff105.1349.0493.6916.3

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value40178731506814-558.243163123227361-168.554-24.892-12.144-54.95311627956862815824641082662401644429209370521918526155.691212253716
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4856.0822.05183.14697.08132.7-7415.61817.61874.23688.25414.1-1471.4-358.2-145.4-659.6594.3174.1511.0577.519.737.521.79.422.448.512.621.231.9123.036.438.225.6248.7140.7216.639.9663.8228.152.914.6554.277.3167.938.6

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Income
Period End2020-12-312020-09-302019-12-312019-09-30
Value-12.83-10.234-6.623-10.184
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-1.8-2.0-4.0-8.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-90.9-94.9-73.5-154.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Income
Period End2020-12-312020-09-302019-12-312019-09-30
Value109.9057.722-2.771
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments1.52.04.7-2.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.691.885.7-42.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.0138.50.0-115.9

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Income
Period End2020-12-312020-09-302019-12-312019-09-30
Value777486212138
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments106.296.0129.5112.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5504.04510.32353.82101.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.013377.20.03299.3

us-gaap:OperatingSegments, esgr:StarStoneSegment


Income
Period End2020-12-312020-09-302019-12-312019-09-302016-03-312015-03-31
Value-43.1720-35.755-11.079216.34
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-5.94.0-21.8-9.034.89.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-305.7189.7-397.0-168.26.92.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.0

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value389202819641788-538.549202118241357-149.378-22.321-0.145-40.428121201067124166475494462248
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4705.22114.15801.45949.97878.5-7153.92248.61801.23917.15353.6-1304.0-321.2-1.7-485.3620.6130.0571.1602.111.646.414.317.343.417.58.617.0

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Income
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302017-12-312017-09-30
Value-12.83-11.625-4.209-6.623-10.184-9.949-1.115-8.356-4.892-18.514
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest-1.6-1.8-0.5-3.3-8.6-4.10.737.4-4.0-89.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-90.9-107.8-42.0-73.5-154.6-161.0-9.7-120.2-24.9-116.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.02379.7

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Income
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value9.8617.385195.619-2.993105.9943.2286.692-10.2967.5265.2732.2484.7723.0660.794
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest1.21.22.42.8-2.54.3-4.0-14.55.5-49.87.17.49.32.96.51.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.868.5191.562.4-45.4166.852.346.434.1-64.840.344.31.11.30.90.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.0103.3317.10.0-125.2672.30.099.60.0-174.20.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Income
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value863626825239142280-13.01341387310342191502825
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest105.597.6104.7118.5120.3115.78.7-153.6113.6357.997.558.980.590.759.147.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6118.15806.38245.62664.42167.34533.5-113.6493.3705.1465.3556.5354.59.342.18.58.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.017220.920811.60.03402.36029.70.0924.70.0687.30.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:StarStoneSegment


Income
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-41.74719-51.709-36.45-10.94-38.438-141.247-51.486.659-34.0214170.0599.5471319
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest-5.13.1-6.6-18.0-9.2-15.994.6230.65.5-164.613.524.70.25.728.636.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-295.6183.0-516.6-404.7-166.1-622.2-1233.1-740.733.9-214.076.9148.60.02.74.16.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value9.422-5.982-1.4681316-5.175-22.427147.5184.749-10.6880.7463.6460.172-9.6291.4324.731-2.929118.8588.4737.509-11.004125.81610-10.2465.668.4527.276211.344.5427.8441314113.742194.4360.9750.617640.979165.922
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax113.9-62.3-10.4129.0166.4-68.7-249.0221.6121.771.1-93.310.743.72.1-49.19.025.3-24.65.42.52.62.4-5.14.62.33.7-4.62.72.95.716.41.15.89.637.029.548.97.868.938.23.21.6166.93.072.414.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.01.3910.00.00.00.00.00.0850.0390.0020.00.011-0.005-0.014
Percentage of IncomeTaxExpenseBenefit-0.010.00.0-0.0-0.00.00.01.8-0.40.30.06.40.1-1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.012.90.00.00.00.00.01.30.30.00.00.1-0.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.01.8

us-gaap:CorporateNonSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value9.422-5.98216-5.272
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0101.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax113.9-62.3166.4-70.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0.8192.521.536-0.7532.1030.2221.0230.6851.9760.7370.7390.280.3150.5540.3680.3560.6340.6810.580.6780.821.0122.252
Percentage of IncomeTaxExpenseBenefit-55.818.19.214.6-9.41.513.614.4-18.598.820.3162.8-3.338.77.8-12.25.67.76.89.0-7.58.338.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.823.415.3-10.023.33.416.610.317.310.68.83.41.63.52.03.00.30.20.20.20.40.40.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.035.225.4-29.60.09.366.737.00.022.719.18.20.09.40.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-0.8649.27111-2.807-16.251137.3992.72-3.8080.1251.219-1.117-12.5990.973.6790.96119.1183.4864.673
Percentage of IncomeTaxExpenseBenefit58.966.670.954.272.591.798.457.335.616.833.4-649.4130.867.777.8-32.8100.6102.941.162.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.185.9118.0-37.3-180.4203.2119.840.7-33.21.814.6-13.4-64.26.119.78.15.42.51.11.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.0254.9297.8-56.30.0318.9159.356.30.03.427.2-22.80.09.00.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:StarStoneSegment


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-1.4230.7333.304-1.615-8.2790.993-0.9041.259-8.895-0.1181.6880.9982.66-0.0780.679-4.249-0.724-1.5713.972.018-6.4090.533-0.6940.6820.736
Percentage of IncomeTaxExpenseBenefit96.95.319.831.236.96.8-12.026.583.2-15.846.3580.2-27.6-5.414.4145.1-6.4-17.746.926.958.24.3-11.96.3-7.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.16.833.0-21.5-91.915.1-14.618.8-77.7-1.720.212.013.6-0.53.6-35.7-0.3-0.41.20.6-2.90.2-0.30.20.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest


Income
Period End2021-06-302021-03-31
Value0.097-0.038
Percentage of IncomeTaxExpenseBenefit1.00.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.2-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest0.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value3.5821.5649.1590.428.8546.5965.231-0.7920.5640.0091.3422.34112.4612.0854.5692.6213.9174.6981.6885.143108.18611
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.316.364.93.988.587.658.1-12.09.10.111.733.7137.329.510.628.714.032.92.20.51.63.43.84.4

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value161616151413131413114.6444.648.9228.0117.2516.417.5736.8684.7965.0275.4245.4015.3685.1564.8764.0032.3523.3073.5293.7343.5933.273.0912.4352.541.7132.0622.1112.4312.4351.6971.9662.0932.9612.8052.394
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax197.0168.6119.5139.1140.0178.2150.1227.0211.0165.240.566.8106.896.236.940.340.657.62.31.41.61.72.51.91.91.41.11.61.22.92.72.74.03.06.73.48.54.48.721.05.65.05.49.012.65.6

us-gaap:InterestExpense us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Interest
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value-2.212-2.817-2.931-3.014-2.583-1.555-1.311-1.165-1.06-0.659
Percentage of InterestExpense-14.7-20.1-21.8-20.2-19.8-14.1-28.3-13.1-13.2-10.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-20.5-28.1-38.9-45.8-41.8-23.3-18.9-13.9-12.7-4.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.084.7

us-gaap:CorporateNonSegment


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value16161413
Percentage of InterestExpense100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax197.0168.6140.0178.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:InterestExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Interest
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1616151715125.951108.536.6647.6466.6815.8275.546.0165.48
Percentage of InterestExpense111.3115.4118.5120.2119.8109.8128.3113.0106.5104.0101.097.3121.5110.2110.9101.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax154.9161.6211.2272.7252.8181.485.6120.7102.441.941.056.12.81.51.81.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment459.3408.0318.9428.1336.3250.7160.5224.7174.261.90.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:StarStoneSegment


Interest
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.510.6540.4470.00.00.4750.00.0060.5410.3820.6440.6220.0470.00.00.00.0060.00.00.0
Percentage of InterestExpense3.44.73.30.00.04.30.00.16.86.08.59.11.00.00.00.00.10.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.76.55.90.00.07.10.00.16.52.43.45.20.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestExpense us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:CoreSpecialty, esgr:SaleAndRecapitalizationAgreement, srt:AffiliatedEntity


Interest
Period End2021-06-302021-03-31
Value0.00.015
Percentage of InterestExpense0.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CoreSpecialty esgr:SaleAndRecapitalizationAgreement srt:AffiliatedEntity0.00.0

us-gaap:InterestExpense us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:NorthshoreHoldingsLimited, srt:AffiliatedEntity


Interest
Period End2021-06-30
Value0.083
Percentage of InterestExpense0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:NorthshoreHoldingsLimited srt:AffiliatedEntity0.0

Interest Expense Debt

us-gaap:InterestExpenseDebt

us-gaap:InterestExpenseDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value151516141313121413104.924.5528.78.0117.4356.26.86.34.5495.05.45.45.45.24.84.0
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax192.1165.7116.5135.8136.6175.3139.3226.7211.0160.543.065.5104.296.237.939.036.452.92.21.41.61.72.51.91.91.4

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value12191310179.74715127.031140.6228.3715.717103.444
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax148.8199.095.697.3170.2129.5174.5189.7113.8212.85.4120.468.5126.417.5

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value386192831623807-507.896202126240367-106.423-10.8328.244-41.211273890542215640451114914441052651291373919116947409.674128129.3753.503124211215
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4668.22001.75888.65784.28066.7-6746.82251.21923.03897.25506.5-929.1-155.998.7-494.7650.1245.3483.1459.010.843.512.314.451.418.35.715.647.512.417.523.2103.032.524.614.7185.595.7167.220.1460.5103.931.09.0323.565.155.837.5

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-12.83-11.625-4.209-16.796-6.623-10.184-9.949-6.351-1.115-8.356
Percentage of NetIncomeLoss-1.5-1.9-0.53.3-3.3-8.0-4.1-1.71.077.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-90.9-107.8-42.0-223.1-73.5-154.6-161.0-95.1-9.7-120.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value5.8264.38911-5.5623.314-1.7656.0794.4973.5351.962-6.0734.4393.111.3262.8141.8080.4680.656.0671.394
Percentage of NetIncomeLoss0.70.71.41.11.6-1.42.51.2-3.3-18.1-15.64.95.75.91.84.51.00.612.49.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax41.340.7112.6-73.936.8-26.898.467.330.928.2-38.223.826.10.60.80.50.10.32.30.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.061.4186.5-218.70.0-73.8396.5243.20.060.5-102.70.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value865623826-449.026239141277400-11.935327010134131422525
Percentage of NetIncomeLoss104.0100.0102.388.4118.3111.6115.4108.911.2-301.2181.2112.362.659.191.363.255.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6125.85782.98255.0-5964.72663.82145.54496.85998.3-104.2469.5444.5542.5287.36.439.77.88.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.017151.620835.2-9007.50.03368.05980.98293.60.0879.9656.50.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:StarStoneSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-26.4957.369-25.909-36.512-33.853-2.704-33.175-31.001-96.908-37.066-20.0978.529100.0375.637.9891115-2.226-2.9923.3378.676-12.261
Percentage of NetIncomeLoss-3.21.2-3.27.2-16.7-2.1-13.8-8.491.1342.2-51.59.519.10.23.619.725.413.9-4.5-20.67.48.2-46.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-187.668.3-258.8-485.0-375.9-41.1-537.0-464.0-846.0-533.3-126.445.787.70.01.62.43.77.1-0.8-1.21.23.9-5.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.055103.13121-19.992-32.722-4.9-0.109-2.713-2.148-42.955-11.489-8.3890.7826.206-14.83211177.005149.1879.085-19.216-3.0413.6628.64512-5.2322.5163.8254.7223.4696.0011.0269.8647.7760.1295.733379.9845.6391.571244.391111.695
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.9112.422.2203.1-199.7-434.7-54.4-1.7-43.9-32.2-375.0-165.3-100.49.431.6-93.361.8146.33.44.02.82.9-8.8-1.11.43.05.6-2.50.83.03.52.87.71.326.215.60.511.9134.486.018.64.063.813.349.64.0

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value3.05510-19.992-32.722
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.9112.4-199.7-434.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value4.0352.9967.896-3.8682.305-1.2284.2273.1282.4591.2661.1211.4112.745-4.2233.0872.1630.9221.9581.2580.3261.2214.3311.982
Percentage of NetIncomeLossAttributableToNoncontrollingInterest128.913.7-39.511.8-47.01126.6-155.8-145.6-5.7-11.0-13.4180.444.228.526.712.413.213.713.73.6-6.4-142.454.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.627.878.9-51.425.6-18.668.446.821.518.213.416.914.0-26.616.518.20.40.50.40.10.61.60.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.041.9130.6-152.10.0-51.4275.7169.20.039.029.041.10.0-71.40.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-1.0932.519-0.936-2.0870.0581.4392.2662.646-1.0751.6591.0941.4290.7433.3142.6218.0096.0618.4542.370.715
Percentage of NetIncomeLossAttributableToNoncontrollingInterest-34.911.54.76.4-1.2-1320.2-83.5-123.22.5-14.4-13.0182.712.0-22.322.746.086.559.025.87.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.723.4-9.4-27.70.621.836.739.6-9.423.913.117.23.820.814.067.22.92.40.70.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.069.3-23.6-41.90.034.348.854.80.044.724.429.20.030.80.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:StarStoneSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.18916-26.952-26.767-7.263-0.32-9.206-7.922-44.339-14.414-10.604-2.0582.718-13.9235.8347.2530.0223.9175.5598.04410-1.548-2.0812.3216.035-8.651
Percentage of NetIncomeLossAttributableToNoncontrollingInterest6.074.8134.881.8148.2293.6339.3368.8103.2125.5126.4-263.243.893.950.541.60.327.360.588.5-56.350.9-56.826.848.8165.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.3152.0-269.3-355.6-80.6-4.9-149.0-118.6-387.1-207.4-127.0-24.713.8-87.631.360.90.01.11.72.65.0-0.6-0.80.82.7-4.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-0.6140.9540.459-0.915-0.1480.763-1.478-0.081-0.204-0.396-1.743-0.586-0.4510.0370.0210.8450.599-1.2110.92-2.2980.329-4.443-3.017-0.579-3.442-6.001-1.026-9.864-7.776-0.129-5.733-37.571-9.984-5.639-1.571-24.509-4.391
Percentage of NetIncomeLossAttributableToNoncontrollingInterest-20.18.814.7-4.20.7-2.330.274.37.518.44.15.15.44.70.2-4.4-19.7-33.110.6-18.6-6.3-176.6-78.9-12.3-99.2-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.49.93.3-8.5-1.510.1-16.4-1.2-3.3-5.9-15.2-8.4-5.40.40.00.40.2-0.50.3-1.00.2-1.5-2.4-0.4-2.8-7.7-1.3-26.2-15.6-0.5-11.9-134.4-86.0-18.6-4.0-63.8-13.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.055103.13121-19.992-32.722-4.9-0.109-2.713-2.148-42.955-11.489-8.3890.7826.206
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.9112.422.2203.1-199.7-434.7-54.4-1.7-43.9-32.2-375.0-165.3-100.49.431.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value377183822615798-516.821193117231358-113.423-15.9658.244-41.21127389054
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4560.41908.75825.45701.47977.6-6865.32152.11787.53752.75369.7-990.2-229.798.7-494.7650.1245.3483.1459.0

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-21.755-20.55-13.134-25.721-15.548-19.109-18.874-15.49-8.115-13.489-13.159-3.237.106-15.019
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic-2.6-3.3-1.65.0-8.0-16.2-8.1-4.37.284.5-159.67.85.6-38.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-154.1-190.5-131.2-341.7-172.6-290.1-305.5-231.9-70.8-194.1-157.6-38.836.2-94.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.01930.5

us-gaap:CorporateNonSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value-95.448-8.074-191.0867.704
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic-25.3-4.4-23.9-1.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1153.6-84.1-1909.0102.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5.8264.38911-5.5623.314-1.7656.0794.4973.5351.9621.5311.9693.947-6.073
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic0.70.71.41.11.7-1.52.61.3-3.1-12.318.6-4.83.1-15.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax41.340.7112.6-73.936.8-26.898.467.330.928.218.323.620.1-38.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.061.4186.5-218.70.0-73.8396.5243.20.060.539.657.40.0-102.7

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value865623826-449.026239141277400-11.9353241-36.86111280
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic105.2101.4103.586.9123.8120.0119.8111.710.5-204.4502.189.488.2205.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6125.85782.98255.0-5964.72663.82145.54496.85998.3-104.2469.5495.6-442.5573.7504.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.017151.620835.2-9007.50.03368.05980.98293.60.0879.9922.4-752.60.0745.0

us-gaap:OperatingSegments, esgr:StarStoneSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-26.4957.369-25.909-36.512-33.853-2.704-33.175-31.001-96.908-37.066-21.518-3.0883.941-20.097
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic-3.21.2-3.27.1-17.5-2.3-14.3-8.685.4232.2-261.07.53.1-51.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-187.668.3-258.8-485.0-375.9-41.1-537.0-464.0-846.0-533.3-257.6-37.120.1-126.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value389202834645787-540.618197126238365-149.378-22.321-0.145-40.428
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic103.2110.8101.5105.098.6104.6102.1107.5102.7101.9131.7139.8-1.898.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4705.22114.15910.75987.37867.0-7181.42196.81921.33853.35474.4-1304.0-321.2-1.7-485.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Investment Income

us-gaap:NetInvestmentIncome

us-gaap:NetInvestmentIncome


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value76626172947779857778686966665852494842575460514346333127332423252717161923229.43418221830202226
Percentage of NetInvestmentIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax920.3646.9435.7668.7943.51034.0881.31297.61258.21177.9597.6999.0795.8796.1298.6327.3264.7409.120.216.016.419.123.716.118.111.814.113.211.319.117.320.335.022.144.539.496.047.433.7163.475.847.379.761.3103.361.5

us-gaap:NetInvestmentIncome us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Net
Period End2021-06-30
Value-20.171
Percentage of NetInvestmentIncome-26.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-243.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.0

us-gaap:NetInvestmentIncome us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-4.071-2.864-2.793-2.488-2.132-2.147-2.446-1.685-1.287-0.918-0.8525.7821.1950.76
Percentage of NetInvestmentIncome-6.6-4.0-3.0-3.2-2.7-2.5-3.1-2.1-1.9-1.3-1.38.72.01.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-28.8-26.6-27.9-33.0-23.7-32.6-39.6-25.2-11.2-13.2-10.269.46.14.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.0-97.7

us-gaap:NetInvestmentIncome us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value1.161.7781.0791.5251.5491.7362.0531.7111.6191.5971.2851.1851.3860.8470.8611.1240.8980.8530.6350.5540.6490.5460.523
Percentage of NetInvestmentIncome1.92.51.12.02.02.02.62.22.42.31.91.82.41.61.72.32.11.51.20.91.31.31.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.216.510.820.317.226.433.225.614.123.015.414.27.15.34.69.40.40.20.20.20.30.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.024.917.960.00.072.6133.992.50.049.333.234.50.014.30.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:InvestmentSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value75618664
Percentage of NetInvestmentIncome99.698.891.383.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax916.8639.0861.8863.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:InvestmentSegment0.00.00.00.0

us-gaap:OperatingSegments, esgr:LegacyUnderwritingSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.2880.7588.189.751
Percentage of NetInvestmentIncome0.41.28.712.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.57.981.7129.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:LegacyUnderwritingSegment0.00.0135.3383.4

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value5866896768736566585957514842393534353736
Percentage of NetInvestmentIncome95.392.894.386.786.886.384.784.884.985.386.277.982.882.380.173.382.061.469.360.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax415.1620.4889.7896.0764.91119.71066.0998.8507.2852.5686.0620.0247.4269.4212.0299.916.69.811.411.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.01839.92245.51353.10.01757.71417.81381.00.01597.81276.81054.50.0398.00.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:StarStoneSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value5.8186.2987.1011111121211109.5048.7457.7017.4767.5927.1895.4495.715.4785.7535.285.542.8424.0582.131.0262.93
Percentage of NetInvestmentIncome9.58.77.514.613.914.215.815.214.613.713.211.612.814.614.511.213.59.510.68.810.76.68.76.33.310.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax41.258.470.9150.8122.8184.2198.6178.787.5136.7104.792.438.147.838.545.72.71.51.71.72.51.11.60.70.51.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetInvestmentIncome us-gaap:CounterpartyName

esgr:StonePointAndAffiliatedEntities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value4.4160.4625.1362.3124.7934.0843.7242.257
Percentage of NetInvestmentIncome5.80.78.33.25.15.24.72.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax53.44.836.421.447.954.341.334.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:StonePointAndAffiliatedEntities0.00.00.00.00.00.00.00.0

us-gaap:NetInvestmentIncome us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:CoreSpecialty, esgr:AssumingQuotaShareReinsurances, srt:AffiliatedEntity


Net
Period End2021-06-302021-03-31
Value0.00.121
Percentage of NetInvestmentIncome0.00.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.01.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CoreSpecialty esgr:AssumingQuotaShareReinsurances srt:AffiliatedEntity0.00.0

us-gaap:NetInvestmentIncome us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:AmTrustFinancialServicesInc., srt:AffiliatedEntity


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.4931.4932.9980.01.8962.52.151.91.8291.821
Percentage of NetInvestmentIncome2.02.44.90.02.03.22.72.22.42.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.015.621.20.018.933.223.928.829.627.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AmTrustFinancialServicesInc. srt:AffiliatedEntity0.00.00.00.00.00.00.00.00.00.0

esgr:EnhanzedRe, srt:AffiliatedEntity


Net
Period End2020-12-312020-09-30
Value-3.453-0.819
Percentage of NetInvestmentIncome-5.6-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-24.5-7.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:EnhanzedRe srt:AffiliatedEntity0.00.0

us-gaap:NetInvestmentIncome us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

esgr:AtriumSyndicate609


Net
Period End2021-03-31
Value0.758
Percentage of NetInvestmentIncome1.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate6090.0

us-gaap:NetInvestmentIncome us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

esgr:AtriumSyndicate609, esgr:QuotaShareAgreement


Net
Period End2021-06-30
Value0.288
Percentage of NetInvestmentIncome0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate609 esgr:QuotaShareAgreement0.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value737377858486808310079767776707066
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax521.6684.1778.31137.6942.01309.01307.11242.6873.21142.8917.7925.9390.6445.2380.0561.3

us-gaap:OperatingExpenses us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.3213.0082.8722.8774.4843.7423.1933.0335.5183.9524.134.1775.2172.507
Percentage of OperatingExpenses5.94.13.73.45.34.34.03.75.55.05.45.46.83.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax30.627.928.738.249.856.851.745.448.256.949.450.126.615.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.042.147.5113.10.0156.5208.3164.00.0121.9106.9121.70.042.4

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5350484860514443443738383535
Percentage of OperatingExpenses73.168.262.356.370.959.654.753.044.547.250.149.846.350.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax381.5466.7485.1640.4667.9780.2715.6658.5388.3539.2459.5461.0180.7224.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.01384.21224.5967.10.01224.9951.7910.40.01010.6855.3784.10.0331.3

us-gaap:OperatingSegments, esgr:StarStoneSegment


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1520263420313335503834343532
Percentage of OperatingExpenses21.027.734.040.323.836.141.343.450.047.844.544.846.946.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax109.5189.5264.5459.0224.3471.9539.9538.8436.7546.8408.8414.8183.3205.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-0.3991.4181.891-1.205-0.6861.962-2.551-1.038-0.801-1.46-0.1430.1761.22514112.3151.942-4.0632.803-4.54210-0.817-11.293.299-15.886-11.378-14.8154.7142.058-7.0259.053-20.278-1.2230.8673.597-3.8922.98512-25.52610
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.814.817.5-12.0-9.121.8-38.7-16.8-12.0-12.7-2.12.114.772.873.212.416.3-1.90.8-1.43.4-0.4-4.21.3-5.5-5.1-7.01.61.6-5.37.4-26.0-1.52.37.2-16.06.244.2-219.933.2

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value50-97.95121196-45.9971.509-3.804-4.0122.9231.429-1.451-1.1540.90915133.9062.479-7.2074.189-2.255170.068-13.3195.423-20.348-19.77-18.585.3671.73-2.638.883-20.369-2.962-3.2660.781-5.2664.9584.694-31.60610
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax616.4-1020.585.5104.0962.2-611.016.8-57.8-64.943.812.5-20.9-13.810.980.187.120.920.8-3.51.2-0.75.60.0-5.02.1-7.1-8.9-8.71.81.4-2.07.2-26.2-3.6-8.71.6-21.610.316.8-272.335.1

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-0.3991.418-1.205-0.686
Percentage of OtherComprehensiveIncomeLossNetOfTax-0.8-1.4-1.31.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.814.8-12.0-9.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.0

us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value51-99.36897-45.311
Percentage of OtherComprehensiveIncomeLossNetOfTax100.8101.4101.398.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax621.2-1035.3974.2-601.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value51-99.117198.11186-41.141-1.273-0.195-3.0473.6420.569-1.294-0.98-0.294-0.1561.8230.796-0.111-5.241.3952.1195.4631.789-1.76
Percentage of OtherComprehensiveIncomeLossNetOfTax100.7101.2157.972.390.389.4-84.45.175.9124.639.889.284.9-32.3-1.013.220.4-4.572.733.3-94.031.22630.913.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax620.7-1032.7135.075.2868.9-546.5-14.1-3.0-49.354.55.0-18.6-11.7-3.5-0.811.54.3-0.9-2.50.40.61.70.8-0.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-0.5650.743-1.4252.477-1.038-0.6861.961-2.56-1.036-0.803-1.455-0.140.1811.2290.9734.1872.321.933-4.0552.799-4.54210-1.447-12.274
Percentage of OtherComprehensiveIncomeLossNetOfTax-1.1-0.8-11.822.1-1.11.5130.067.325.8-27.5-101.89.6-15.7135.26.230.259.478.056.366.8201.460.4-2127.992.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.87.7-10.123.0-10.4-9.121.8-38.9-16.8-12.0-12.7-2.02.214.85.026.312.416.2-1.90.8-1.43.4-0.7-4.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value50-97.9596-45.997
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax616.4-1020.5962.2-611.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.0

Other Income

us-gaap:OtherIncome

us-gaap:OtherIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-3.3590.5513348-1.08720190.826115.81234116.294169.303-3.8481012-1.2770.614.0482.41122.883112.9034.5782.2787.1640.022-0.081.0880.5931.3971.1380.7330.5662.5640.3951.3780.7330.536
Percentage of OtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-40.65.7236.3448.7-10.9271.6216.512.5178.587.0299.1166.175.4199.747.4-24.258.2102.4-0.60.21.20.85.81.14.61.02.11.12.40.0-0.10.90.81.73.01.52.35.31.411.92.41.4

us-gaap:OtherIncome us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-2.0260.211.114-1.971-0.0881.00.7590.212-0.307-0.0040.527-0.730.4790.01
Percentage of OtherIncome-6.10.4-102.5-9.6-0.5121.16.93.6-0.9-0.08.4-4.45.1-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-14.31.911.1-26.2-1.015.212.33.2-2.7-0.16.3-8.82.40.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.0-1.3

us-gaap:CorporateNonSegment


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-6.006-5.246-2.016-7.439
Percentage of OtherIncome178.8-952.1185.5-36.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-72.6-54.7-20.1-98.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:OtherIncome us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0.0260.072-0.0020.0350.0340.0350.0350.0360.0350.0070.0560.0640.0420.0690.050.0690.0550.0520.0650.0340.1060.0990.076
Percentage of OtherIncome0.10.10.20.20.24.20.30.60.10.10.90.40.5-1.80.50.6-4.38.51.61.40.83.40.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.7-0.00.50.40.50.60.50.30.10.70.80.20.40.30.60.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.01.0-0.01.40.01.52.31.90.00.21.41.90.01.20.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:LegacyUnderwritingSegment


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-2.549-6.5180.030.12
Percentage of OtherIncome75.9-1182.9-2.80.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-30.8-67.90.31.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:LegacyUnderwritingSegment0.00.00.54.7

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3148-2.2312219-0.2859.9175.5040.98911-9.3342.5582.478-4.0181011-1.5251.6922.0361.8
Percentage of OtherIncome95.499.2205.2109.1100.9-34.589.994.72.999.0-148.315.426.6104.499.297.8119.4277.450.374.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax225.6445.2-22.3296.2218.4-4.3160.582.48.6164.4-111.830.712.6-25.357.7100.1-0.70.50.60.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.01320.4-56.3447.20.0-6.8213.5113.90.0308.1-208.052.20.0-37.30.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:RunOff


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value5.196120.89927
Percentage of OtherIncome-154.72235.0-82.7135.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax62.8128.39.0368.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:RunOff62.8128.322.7556.9

us-gaap:OperatingSegments, esgr:StarStoneSegment


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value3.5180.0990.0320.085-0.1170.0760.3190.06-0.1090.117-0.60.0510.40.0910.0330.0460.0920.0931.5840.0110.466-1.1561.303
Percentage of OtherIncome10.50.2-2.90.4-0.69.22.91.0-0.31.0-9.50.34.3-2.40.30.4-7.215.239.10.53.7-40.111.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.90.90.31.1-1.31.25.20.9-1.01.7-7.20.62.00.60.20.40.00.00.50.00.2-0.40.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIncome us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

esgr:AtriumSyndicate609, esgr:QuotaShareAgreement


Other
Period End2021-06-30
Value1.282
Percentage of OtherIncome-38.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate609 esgr:QuotaShareAgreement0.0

Preferred Stock Dividends Income Statement Impact

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:PreferredStockDividendsIncomeStatementImpact


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value8.9258.9258.9258.9258.9258.9258.9258.9258.9259.1397.05.1330.00.00.00.00.00.0
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax107.993.063.282.789.2118.699.1135.5144.5136.861.173.90.00.00.00.00.00.0

us-gaap:PreferredStockDividendsIncomeStatementImpact us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Preferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value8.9258.9258.9258.9258.9258.9258.9259.1397.05.133
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.282.789.2118.699.1135.5144.5136.861.173.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.00.0

Premiums Earned Net

us-gaap:PremiumsEarnedNet

us-gaap:PremiumsEarnedNet


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value599210816114225927227027633523126422817016014815514821622322620919723121219817119521661735875310.8190.8220.896
Percentage of PremiumsEarnedNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax720.9967.7765.91499.21427.33452.43027.54103.94476.65018.52024.93807.22739.62043.2818.4931.3833.41249.8103.562.268.766.490.686.282.769.277.192.373.248.355.447.797.138.92.21.63.7

us-gaap:PremiumsEarnedNet us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Premiums
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.7155.7066.1313.3373.5084.3035.9716.598210.8231.060.9921.1531.187
Percentage of PremiumsEarnedNet4.43.54.31.31.31.62.22.09.50.30.50.60.70.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.452.961.244.338.965.396.698.8192.011.812.711.95.97.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.0-152.6

us-gaap:PremiumsEarnedNet us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Premiums
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value4742434244423838393634353732323228323131333333
Percentage of PremiumsEarnedNet43.726.230.416.316.215.913.811.617.114.015.120.723.322.120.821.613.014.614.015.217.214.316.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax334.3393.3433.4562.8490.7651.5618.3580.0345.6532.0413.3422.8190.4206.2173.5270.413.59.19.610.115.512.313.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.0593.4717.91666.10.01794.82491.82095.90.01140.6893.21026.00.0554.40.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:LegacyUnderwritingSegment


Premiums
Period End2021-06-302021-03-312020-06-302020-03-31
Value1720132143
Percentage of PremiumsEarnedNet28.921.692.655.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax208.4208.81322.21903.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:LegacyUnderwritingSegment0.00.02189.85635.9

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Premiums
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1417101626164876-17.802109.6097.1784.3066.4153.3650.0765.5471.2974.4765.435
Percentage of PremiumsEarnedNet13.610.87.46.29.76.217.522.9-7.73.94.24.22.74.32.20.12.60.62.02.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax103.9162.0105.1212.9294.4255.6784.61147.6-155.4150.2115.186.221.940.418.00.62.70.41.41.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.0480.5265.2321.60.0401.31043.51586.80.0281.6214.2146.50.059.60.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:RunOff


Premiums
Period End2021-06-302021-03-312020-06-302020-03-31
Value42721016
Percentage of PremiumsEarnedNet71.178.47.46.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax512.5758.9105.1212.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:RunOff512.5758.9265.2321.6

us-gaap:OperatingSegments, esgr:StarStoneSegment


Premiums
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value419682198198206183213188216183126117107118115180170171154149162137123115120
Percentage of PremiumsEarnedNet38.459.458.076.272.876.366.563.681.181.880.274.573.372.776.277.583.776.475.473.675.770.364.962.267.061.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax294.2891.0827.52632.32203.53131.52977.13192.11642.63113.02198.51522.3600.2677.3635.1968.786.647.551.848.968.660.653.743.051.656.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PremiumsEarnedNet us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:CoreSpecialty, esgr:AssumingQuotaShareReinsurances, srt:AffiliatedEntity


Premiums
Period End2021-06-302021-03-31
Value-1.314.245
Percentage of PremiumsEarnedNet-2.24.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-15.844.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CoreSpecialty esgr:AssumingQuotaShareReinsurances srt:AffiliatedEntity0.00.0

us-gaap:PremiumsEarnedNet us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

esgr:AtriumSyndicate609


Premiums
Period End2021-03-31
Value20
Percentage of PremiumsEarnedNet21.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax208.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate6090.0

us-gaap:PremiumsEarnedNet us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

esgr:AtriumSyndicate609, esgr:QuotaShareAgreement


Premiums
Period End2021-06-30
Value17
Percentage of PremiumsEarnedNet28.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax208.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate609 esgr:QuotaShareAgreement0.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value389202834645787-540.618197126238365-149.378-22.321-0.145-40.4281332410172291704954924618531182154331424325127955401516622155.074148252317
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4705.22114.15910.75987.37867.0-7181.42196.81921.33853.35474.4-1304.0-321.2-1.7-485.3681.7152.0545.0605.214.247.515.117.342.617.27.118.653.110.018.326.2106.635.332.415.9211.7111.2167.732.1594.9189.949.713.0387.378.5105.441.5

us-gaap:ProfitLoss us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Profit
Period End2021-06-30
Value196
Percentage of ProfitLoss50.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2375.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.0

us-gaap:ProfitLoss us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Profit
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-12.83-11.625-4.209-6.623-10.184-9.949-6.351-1.115-8.356-13.159-3.237.106-15.019
Percentage of ProfitLoss-1.5-1.8-0.5-3.3-8.0-4.2-1.70.737.49075.28.05.3-62.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-90.9-107.8-42.0-73.5-154.6-161.0-95.1-9.7-120.2-157.6-38.836.2-94.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.01930.5

us-gaap:ProfitLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Profit
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302015-09-302015-06-30
Value9.8617.3855.619-2.993107.6255.9943.2282.6523.386.692-10.2962.2484.7723.066103.376
Percentage of ProfitLoss1.21.12.8-2.44.32.1-4.0-14.5-1829.0-8.45.0-42.67.62.86.222.618.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.868.562.4-45.4166.8114.152.346.431.840.634.1-64.81.11.30.93.91.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment0.0103.30.0-125.2672.3412.40.099.668.698.50.0-174.20.00.00.00.00.0

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Profit
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value863626239142280403-13.013442-35.43211383
Percentage of ProfitLoss103.597.0121.3112.8117.7110.38.7-153.6-29299.387.684.7345.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6118.15806.32664.42167.34533.56037.9-113.6493.3508.7-425.3577.5525.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment0.017220.90.03402.36029.78348.30.0924.7946.8-723.40.0775.8

us-gaap:OperatingSegments, esgr:StarStoneSegment


Profit
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-26.30623-41.116-3.024-42.381-38.923-141.247-51.48-32.122-5.1466.659-34.020.0599.547131926-3.774-5.0735.65814-20.912
Percentage of ProfitLoss-3.23.7-20.8-2.4-17.8-10.694.6230.622153.112.75.0-140.80.25.627.235.928.5-8.2-27.910.612.4-98.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-186.3220.3-456.5-45.9-686.0-582.6-1233.1-740.7-384.6-61.833.9-214.00.02.74.16.212.1-1.4-2.02.06.6-9.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:CounterpartyName

esgr:AnglePoint


Profit
Period End2021-06-30
Value196
Percentage of ProfitLoss50.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2375.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AnglePoint0.0

esgr:StonePointAndAffiliatedEntities


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2625653834-98.4324.05-1.1851121-14.585105.737
Percentage of ProfitLoss6.912.57.95.94.418.22.0-0.94.75.89.8-46.5-3956.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax323.1264.4465.6354.5344.9-1307.545.0-18.0180.1317.4-127.3149.468.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:StonePointAndAffiliatedEntities0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:AmTrustFinancialServicesInc., srt:AffiliatedEntity


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.040.001-12.0390.0455.852.326121.91.829
Percentage of ProfitLoss0.00.0-1.40.00.7-0.46.21.50.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.0-85.30.458.430.9135.528.829.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AmTrustFinancialServicesInc. srt:AffiliatedEntity0.00.00.00.00.00.00.00.00.0

esgr:ClearSpring, srt:AffiliatedEntity


Profit
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-0.361-1.10.674-2.019-0.515-1.18-1.707-1.7670.238
Percentage of ProfitLoss-0.1-0.1-0.1-1.6-0.2-0.37.61218.6-0.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.3-11.09.0-30.7-8.3-17.7-24.6-21.22.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:ClearSpring srt:AffiliatedEntity0.00.00.00.00.00.00.00.00.0

esgr:CoreSpecialty, srt:AffiliatedEntity


Profit
Period End2021-06-302021-03-31
Value5.73817
Percentage of ProfitLoss1.58.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.3185.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CoreSpecialty srt:AffiliatedEntity0.00.0

esgr:EnhanzedRe, srt:AffiliatedEntity


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.102-0.722-6.881.729-3.1850.3140.420.150.1660.086
Percentage of ProfitLoss-0.0-0.4-0.80.3-0.4-0.10.20.10.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.2-7.5-48.716.0-31.84.24.72.32.71.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:EnhanzedRe srt:AffiliatedEntity0.00.00.00.00.00.00.00.00.00.0

esgr:NorthshoreHoldingsLimited, srt:AffiliatedEntity


Profit
Period End2021-06-302020-03-31
Value-0.0550.318
Percentage of ProfitLoss-0.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.74.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:NorthshoreHoldingsLimited srt:AffiliatedEntity0.00.0

us-gaap:ProfitLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Profit
Period End2021-06-302021-03-312020-06-302020-03-31
Value5.623-11.90614-13.424
Percentage of ProfitLoss1.4-5.91.92.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax68.0-124.0149.7-178.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.0

us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

esgr:AtriumSyndicate609


Profit
Period End2021-06-302021-03-31
Value-1.4320.341
Percentage of ProfitLoss-0.40.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17.33.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate6090.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value8.2749.5981410107.5289.0076.5876.1786.681116.958.3528.331191518112083583303152172682562872232122961271331237781374924482711303938322242
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value7.2477.156.0442.5434.3872.3911.5331.8498.0823.2423.8653.4335.4355.911
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.366.360.433.848.736.324.827.770.646.646.341.227.737.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.366.360.433.848.736.324.827.770.646.646.341.227.737.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value6.8743.6373.9664.9854.624.1964.6454.8323.3733.7084.4874.8981310
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax48.733.739.666.251.363.775.272.329.453.453.758.869.067.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax48.733.739.666.251.363.775.272.329.453.453.758.869.067.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, esgr:RunOff


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value8.2749.5983.9664.985
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.039.666.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.039.666.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:RunOff100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value54515910207931213-268.7675335116418871872952551182982412862802083583303152172682562872232122961271331237781374924482711303938322242
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6598.11658.97227.87351.912126.3-3570.25920.27763.710379.013280.51640.44248.93059.31422.11522.41518.71534.22352.4100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value-6.0069.648-2.016-7.439
Percentage of Revenues-1.16.1-0.22.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-72.6100.5-20.1-98.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:InvestmentSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value480411012-509.719
Percentage of Revenues88.126.383.4189.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5811.8436.010117.5-6771.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:InvestmentSegment0.00.00.00.0

us-gaap:OperatingSegments, esgr:LegacyUnderwritingSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value1512187101
Percentage of Revenues2.88.115.5-37.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax183.6135.11875.31346.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:LegacyUnderwritingSegment0.00.03105.93985.7

us-gaap:OperatingSegments, esgr:RunOff


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value55941548
Percentage of Revenues10.259.51.3-18.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax675.3987.2153.7648.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:RunOff675.3987.2387.8978.5

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2462122059216472177021293191311936318213182241805816556151211520315611136061475914830148821286512470126591285011832120531233211509993610249106188709862083427874804358825908603064596606677552005235
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value7922619648923946
Percentage of Assets36.632.029.629.0
Percentage of Assets36.632.029.629.0
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary


Assetsus-gaap:
Period End2021-06-30
Value2913
Percentage of Assets11.8
Percentage of Assets11.8
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary100.0

us-gaap:Assets us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Assetsus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-614.141-850.62-577.079-524.92-514.852-570.377-734.287-655.935-814.333-583.278-447.045
Percentage of Assets-2.8-3.9-2.7-2.7-2.7-3.1-4.0-3.6-4.9-3.9-3.3
Percentage of Assets-2.8-3.9-2.7-2.7-2.7-3.1-4.0-3.6-4.9-3.9-3.3
Percentage of Assets esgr:CorporateAndReconcilingItems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Assetsus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value615638608590580568558588591598556610576590563601577555
Percentage of Assets2.82.92.93.13.03.13.13.33.64.04.14.13.94.04.44.84.64.7
Percentage of Assets2.82.92.93.13.03.13.13.33.64.04.14.13.94.04.44.84.64.7
Percentage of Assets us-gaap:OperatingSegments esgr:AtriumSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Assetsus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value190621796117154154381577514691149011466113362119071036810056101901032082977602
Percentage of Assets88.182.580.680.781.580.781.881.280.778.776.268.168.769.364.564.3
Percentage of Assets88.182.580.680.781.580.781.881.280.778.776.268.168.769.364.564.3
Percentage of Assets us-gaap:OperatingSegments esgr:NonlifeRunoffSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, esgr:StarStoneSegment


Assetsus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value258340214108362735223524349934643416319931283193310730392968302329152765277825842876
Percentage of Assets11.918.519.319.018.219.319.219.220.621.223.021.621.020.423.124.223.021.523.521.429.0
Percentage of Assets11.918.519.319.018.219.319.219.220.621.223.021.621.020.423.124.223.021.523.521.429.0
Percentage of Assets us-gaap:OperatingSegments esgr:StarStoneSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value17243151111459315558157261444814068131281326113321121831074710804120219980112871140111535960092349600983988939211950485767039744578066334654164666084625941074164434347944922543838544020
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets70.068.567.471.573.975.572.772.172.873.873.671.171.177.073.476.576.977.574.674.075.876.675.276.477.174.570.872.673.572.775.977.577.377.869.870.572.074.274.580.374.176.8

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value12471353990810
Percentage of Liabilities8.59.68.18.1
Percentage of Assets5.87.06.06.0
Percentage of Assets srt:ParentCompany15.721.920.320.5

us-gaap:VariableInterestEntityPrimaryBeneficiary


Liabilitiesus-gaap:
Period End2021-06-30
Value693
Percentage of Liabilities4.0
Percentage of Assets2.8
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary23.8

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2462122059216472177021293191311936318213182241805816556151211520315611136061475914830148821286512470126591285011832120531233211509993610249106188709862083427874804358825908603064596606677552005235
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value7922619648923946
Percentage of LiabilitiesAndStockholdersEquity36.632.029.629.0
Percentage of Assets36.632.029.629.0
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value71876760667458205186427648424637451442673901390539173100313630212962286428022777261525772516243823982334230422142199178617551617156815631553148714371400138610721084948
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.230.630.826.724.422.425.025.524.823.623.625.825.819.923.120.520.019.221.822.320.720.121.320.219.520.323.221.620.720.520.419.419.919.426.425.223.821.721.015.820.918.1

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value6674484239013136
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets30.825.023.623.1
Percentage of Assets srt:ParentCompany84.378.179.779.5

us-gaap:VariableInterestEntityPrimaryBeneficiary


Stockholders
Period End2021-06-30
Value2200
Percentage of StockholdersEquity30.6
Percentage of Assets8.9
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary75.5

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value769562901640651815703832107371860255381965295562468192195476980074682110261076982963921102864564352061664065464467279285076275963079982372312661866
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.12.54.22.93.14.33.64.65.94.03.63.75.44.27.04.24.66.27.46.26.35.86.98.58.78.59.79.09.77.47.56.27.88.011.110.911.212.312.911.314.60.015.30.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

srt:ConsolidatedEntityExcludingVariableInterestEntitiesVIE


Cash
Period End2021-06-302020-06-30
Value769651
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0
Percentage of Assets3.13.1
Percentage of Assets srt:ConsolidatedEntityExcludingVariableInterestEntitiesVIE0.00.0

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-31
Value7.8724.568152.458
Percentage of CashAndCashEquivalentsAtCarryingValue0.90.62.50.3
Percentage of Assets0.00.00.10.0
Percentage of Assets srt:ParentCompany0.10.10.30.1

us-gaap:VariableInterestEntityPrimaryBeneficiary


Cash
Period End2021-06-30
Value122
Percentage of CashAndCashEquivalentsAtCarryingValue15.9
Percentage of Assets0.5
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary4.2

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:CounterpartyName

esgr:StonePointAndAffiliatedEntities


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value13342321115554271411
Percentage of CashAndCashEquivalentsAtCarryingValue1.86.22.73.31.86.87.73.31.31.9
Percentage of Assets0.10.20.10.10.10.30.30.20.10.1
Percentage of Assets esgr:StonePointAndAffiliatedEntities0.00.00.00.00.00.00.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

esgr:AtriumSyndicate609


Cash
Period End2021-03-31
Value24
Percentage of CashAndCashEquivalentsAtCarryingValue4.3
Percentage of Assets0.1
Percentage of Assets esgr:AtriumSyndicate6090.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

esgr:AtriumSyndicate609, esgr:QuotaShareAgreement


Cash
Period End2021-06-30
Value24
Percentage of CashAndCashEquivalentsAtCarryingValue3.2
Percentage of Assets0.1
Percentage of Assets esgr:AtriumSyndicate609 esgr:QuotaShareAgreement0.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value2128995137311979881160105513401523114598210281183113512129491104131313181228120012951429
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.64.56.35.54.66.15.57.48.46.35.96.87.87.38.96.47.48.810.29.89.510.914.4

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value7.8724.568152.4584.8844.552
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents0.60.41.50.20.40.4
Percentage of Assets0.00.00.10.00.00.0
Percentage of Assets srt:ParentCompany0.10.10.30.10.00.0

us-gaap:VariableInterestEntityPrimaryBeneficiary


Cash
Period End2021-06-30
Value1002
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents47.1
Percentage of Assets4.1
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary34.4

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.5080.5080.5080.5810.5460.5650.5650.13.8025.403-4.91.341-24.748247.91.5-0.9154.92.1
Percentage of AmortizationOfIntangibleAssets0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value62621011141141141141141141141147373737373737373737373737373737360602121212121212121212121
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.50.60.60.60.60.60.70.80.80.50.50.50.50.50.60.60.60.60.60.60.60.60.70.70.70.70.70.30.30.30.40.40.40.30.30.30.40.4

us-gaap:Goodwill us-gaap:StatementBusinessSegments

esgr:NonlifeRunoffSegment


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302019-12-312018-12-312017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value6262626262212121212121212121212121
Percentage of Goodwill100.0100.061.854.854.829.029.029.029.029.029.029.029.029.035.335.399.9
Percentage of Assets0.30.30.30.30.40.20.20.20.20.20.20.20.20.20.20.20.4
Percentage of Assets esgr:NonlifeRunoffSegment0.00.00.00.00.00.20.30.00.00.00.00.00.00.00.00.00.4

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value62621782152162172172182182192191791801811821831841861871871911921981992012022041491502121
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.81.11.11.21.21.21.31.51.41.11.31.21.21.21.41.51.51.51.61.61.61.72.02.01.91.71.70.40.3

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-312010-12-31
Value1381542854545150343432344141-0.5259.8883.156
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.80.20.50.40.40.50.30.30.40.40.50.5-0.00.10.1

us-gaap:DeferredTaxAssetsLiabilitiesNet us-gaap:StatementGeographical

country:US


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value1561695.1514.947
Percentage of DeferredTaxAssetsLiabilitiesNet113.0109.70.00.0
Percentage of Assets0.70.90.00.0
Percentage of Assets country:US0.00.00.00.0

esgr:OtherJurisdictions


Deferred
Period End2020-12-312019-12-312018-12-31
Value0.0281.0932.808
Percentage of DeferredTaxAssetsLiabilitiesNet0.00.70.0
Percentage of Assets0.00.00.0
Percentage of Assets esgr:OtherJurisdictions0.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value22243233363946454748
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.20.20.20.20.20.30.3

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi

us-gaap:EquitySecuritiesFvNi


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value11581098846653640641729728522400367130130106
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.75.03.93.03.03.43.84.02.92.22.20.90.90.8

us-gaap:EquitySecuritiesFvNi us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Equity
Period End2021-06-30
Value1135
Percentage of EquitySecuritiesFvNi98.0
Percentage of Assets4.6
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary39.0

us-gaap:EquitySecuritiesFvNi us-gaap:ConsolidatedEntities, us-gaap:FinancialInstrument

us-gaap:VariableInterestEntityPrimaryBeneficiary, esgr:PublicEquityFunds


Equity
Period End2021-06-30
Value1079
Percentage of EquitySecuritiesFvNi93.2
Percentage of Assets4.4
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary esgr:PublicEquityFunds0.0

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:ExchangeTradedFunds


Equity
Period End2021-06-30
Value55
Percentage of EquitySecuritiesFvNi4.8
Percentage of Assets0.2
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:ExchangeTradedFunds0.0

us-gaap:EquitySecuritiesFvNi us-gaap:CounterpartyName

esgr:StonePointAndAffiliatedEntities


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1341151039489911211245257
Percentage of EquitySecuritiesFvNi11.610.512.314.413.914.316.717.110.115.6
Percentage of Assets0.50.50.50.40.40.50.60.70.30.3
Percentage of Assets esgr:StonePointAndAffiliatedEntities0.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:Trident, srt:AffiliatedEntity


Equity
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302017-12-31
Value77962732344022
Percentage of EquitySecuritiesFvNi9.113.37.08.826.631.020.7
Percentage of Assets0.40.50.20.20.20.30.2
Percentage of Assets esgr:Trident srt:AffiliatedEntity0.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value767740540361349341430466261140102124103
Percentage of EquitySecuritiesFvNi66.367.463.855.354.653.259.064.050.035.127.895.497.2
Percentage of Assets3.13.42.51.71.61.82.22.61.40.80.60.80.8
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value41273121193030303131362.3252.951
Percentage of EquitySecuritiesFvNi3.62.53.73.23.14.84.24.26.07.89.91.82.8
Percentage of Assets0.20.10.10.10.10.20.20.20.20.20.20.00.0
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3483302742712712702682312292282283.7280.0
Percentage of EquitySecuritiesFvNi30.130.132.441.542.342.136.831.843.957.162.32.90.0
Percentage of Assets1.41.51.31.21.31.41.41.31.31.31.40.00.0
Percentage of Assets us-gaap:FairValueInputsLevel3 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, esgr:PublicEquityFunds


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value263235229282254210297282175140102103
Percentage of EquitySecuritiesFvNi22.721.527.143.339.732.840.738.833.635.127.897.2
Percentage of Assets1.11.11.11.31.21.11.51.61.00.80.60.8
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring esgr:PublicEquityFunds0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:ExchangeTradedFunds


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value504505311789513013318486
Percentage of EquitySecuritiesFvNi43.646.036.812.014.920.418.225.316.5
Percentage of Assets2.12.31.40.40.40.70.71.00.5
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring us-gaap:ExchangeTradedFunds0.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, esgr:PublicEquityFunds


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value41273121193030303131362.951
Percentage of EquitySecuritiesFvNi3.62.53.73.23.14.84.24.26.07.89.92.8
Percentage of Assets0.20.10.10.10.10.20.20.20.20.20.20.0
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring esgr:PublicEquityFunds0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:PrivateEquityFunds


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value3483302742712712702682312292282280.0
Percentage of EquitySecuritiesFvNi30.130.132.441.542.342.136.831.843.957.162.30.0
Percentage of Assets1.41.51.31.21.31.41.41.31.31.31.40.0
Percentage of Assets us-gaap:FairValueInputsLevel3 us-gaap:FairValueMeasurementsRecurring us-gaap:PrivateEquityFunds0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value11581098846653640641729728522400367130106
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.75.03.93.03.03.43.84.02.92.22.20.90.8
Percentage of Assets us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, esgr:PublicEquityFunds


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value304263260303274240327312206171138106
Percentage of EquitySecuritiesFvNi26.324.030.846.542.837.544.942.939.642.937.7100.0
Percentage of Assets1.21.21.21.41.31.31.71.71.11.00.80.8
Percentage of Assets us-gaap:FairValueMeasurementsRecurring esgr:PublicEquityFunds0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:ExchangeTradedFunds


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value504505311789513013318486
Percentage of EquitySecuritiesFvNi43.646.036.812.014.920.418.225.316.5
Percentage of Assets2.12.31.40.40.40.70.71.00.5
Percentage of Assets us-gaap:FairValueMeasurementsRecurring us-gaap:ExchangeTradedFunds0.00.00.00.00.00.00.00.00.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:PrivateEquityFunds


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value3483302742712712702682312292282280.0
Percentage of EquitySecuritiesFvNi30.130.132.441.542.342.136.831.843.957.162.30.0
Percentage of Assets1.41.51.31.21.31.41.41.31.31.31.40.0
Percentage of Assets us-gaap:FairValueMeasurementsRecurring us-gaap:PrivateEquityFunds0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FinancialInstrument

esgr:PublicEquityFunds


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value304263260303274240327
Percentage of EquitySecuritiesFvNi26.324.030.846.542.837.544.9
Percentage of Assets1.21.21.21.41.31.31.7
Percentage of Assets esgr:PublicEquityFunds0.00.00.00.00.00.00.0

us-gaap:ExchangeTradedFunds


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value5045053117895130133
Percentage of EquitySecuritiesFvNi43.646.036.812.014.920.418.2
Percentage of Assets2.12.31.40.40.40.70.7
Percentage of Assets us-gaap:ExchangeTradedFunds0.00.00.00.00.00.00.0

us-gaap:PrivateEquityFunds


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value348330274271271270268
Percentage of EquitySecuritiesFvNi30.130.132.441.542.342.136.8
Percentage of Assets1.41.51.31.21.31.41.4
Percentage of Assets us-gaap:PrivateEquityFunds0.00.00.00.00.00.00.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value115411299256777038237447636305816446466478718318298518358423735445495565373333921264349411724931517193040333441
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.75.14.33.13.34.33.84.23.53.23.94.34.35.66.15.65.75.66.53.04.34.34.74.52.70.30.20.30.40.60.50.20.31.20.30.30.30.50.60.50.70.8

us-gaap:OtherAssets us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value8.0476.3918.5962.877
Percentage of OtherAssets0.90.91.30.3
Percentage of Assets0.00.00.10.0
Percentage of Assets srt:ParentCompany0.10.10.20.1

us-gaap:VariableInterestEntityPrimaryBeneficiary


Other
Period End2021-06-30
Value517
Percentage of OtherAssets44.9
Percentage of Assets2.1
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary17.8

us-gaap:OtherAssets us-gaap:CounterpartyName

esgr:StonePointAndAffiliatedEntities


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1.9710.970.4036.327100.3460.010.5530.05.216
Percentage of OtherAssets0.20.10.00.91.50.00.00.10.00.8
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets esgr:StonePointAndAffiliatedEntities0.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherAssets us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:CoreSpecialty, esgr:AssumingQuotaShareReinsurances, srt:AffiliatedEntity


Other
Period End2021-06-302021-03-312020-12-31
Value2.7646.88438
Percentage of OtherAssets0.20.64.2
Percentage of Assets0.00.00.2
Percentage of Assets esgr:CoreSpecialty esgr:AssumingQuotaShareReinsurances srt:AffiliatedEntity0.00.00.0

esgr:CoreSpecialty, us-gaap:ServiceAgreements, srt:AffiliatedEntity


Other
Period End2021-06-302021-03-312020-12-31
Value5.2314.616.727
Percentage of OtherAssets0.50.40.7
Percentage of Assets0.00.00.0
Percentage of Assets esgr:CoreSpecialty us-gaap:ServiceAgreements srt:AffiliatedEntity0.00.00.0

us-gaap:OtherAssets us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:EnhanzedRe, srt:AffiliatedEntity


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value7.7670.8770.730.4980.3280.41.033
Percentage of OtherAssets0.70.10.10.10.00.00.1
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets esgr:EnhanzedRe srt:AffiliatedEntity0.00.00.00.00.00.00.0

us-gaap:OtherAssets us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

esgr:AtriumSyndicate609


Other
Period End2021-03-31
Value95
Percentage of OtherAssets8.5
Percentage of Assets0.4
Percentage of Assets esgr:AtriumSyndicate6090.0

us-gaap:OtherAssets us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

esgr:AtriumSyndicate609, esgr:QuotaShareAgreement


Other
Period End2021-06-30
Value41
Percentage of OtherAssets3.6
Percentage of Assets0.2
Percentage of Assets esgr:AtriumSyndicate609 esgr:QuotaShareAgreement0.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value6.0476.3027.9597.9558.8361011
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.10.1

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1364136313731447154215411191121014971103861394439860646653640730673570614580600650429320320386485452355347346107127126243242314205245
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.56.26.36.77.28.16.26.68.26.15.22.62.95.54.84.44.34.95.24.64.94.55.15.33.73.23.13.65.65.24.34.44.31.82.22.13.83.74.64.04.7

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities

srt:ParentCompany


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value9031191861646
Percentage of LongTermDebt65.8100.0100.0100.0
Percentage of Assets4.26.25.24.8
Percentage of Assets srt:ParentCompany11.419.217.616.4

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

esgr:A2018EGLRevolvingCreditFacility, us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1751751852603503500.02020625715460.0
Percentage of LongTermDebt12.812.813.518.022.722.70.01.713.823.31.711.80.0
Percentage of Assets0.70.80.91.21.61.80.00.11.11.40.10.30.0
Percentage of Assets esgr:A2018EGLRevolvingCreditFacility us-gaap:LineOfCredit0.00.00.00.00.00.00.00.00.00.00.00.00.0

esgr:JuniorSubordinatedNotesDue2040, us-gaap:JuniorSubordinatedDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value344344344344
Percentage of LongTermDebt25.325.325.123.8
Percentage of Assets1.41.61.61.6
Percentage of Assets esgr:JuniorSubordinatedNotesDue2040 us-gaap:JuniorSubordinatedDebt0.00.00.00.0

esgr:SeniorNotesDue2022, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value3493493493493483483483483483483483473473473473473473470.0
Percentage of LongTermDebt25.625.625.424.122.622.629.328.823.331.540.488.279.140.453.753.254.247.50.0
Percentage of Assets1.41.61.61.61.61.81.81.91.91.92.12.32.32.22.62.42.32.30.0
Percentage of Assets esgr:SeniorNotesDue2022 us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

esgr:SeniorNotesDue2029, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value4944944944934934934934934930.0
Percentage of LongTermDebt36.336.236.034.132.032.041.440.733.00.0
Percentage of Assets2.02.22.32.32.32.62.52.72.70.0
Percentage of Assets esgr:SeniorNotesDue2029 us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:LongtermDebtType

us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value844843843843842842842841841348
Percentage of LongTermDebt61.961.961.458.254.754.670.769.556.240.4
Percentage of Assets3.43.83.93.94.04.44.34.64.62.1
Percentage of Assets us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value6.4931611169.159.1189.2041014141415222223289394929243
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.80.70.70.80.4

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1212131413131412121212109.7279.2769.264109.4189.2178.523.4773.6413.893.9112034215217223258227222225221220221256249264297264261267
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.20.31.92.22.22.42.62.62.72.82.73.84.34.14.14.53.95.05.1

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value19202728293134
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.20.2

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value5703000.05778000.08099000.07829000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value4047000.04136000.07267000.07032000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3165000.03164000.05561000.05328000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value4534000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value8577000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302019-09-302019-06-302019-03-31
Value25263536464749
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.20.20.30.30.3

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value32344345
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets0.10.20.20.2

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value7207000.07629000.08789000.08972000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value71876760667458205186427648424637451442673901390539173100313630212962286428022777261525772516243823982334230422142199178617551617156815631553148714371400138610721084948
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.230.630.826.724.422.425.025.524.823.623.625.825.819.923.120.520.019.221.822.320.720.121.320.219.520.323.221.620.720.520.419.419.919.426.425.223.821.721.015.820.918.1

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value6674484239013136
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets30.825.023.623.1
Percentage of Assets srt:ParentCompany84.378.179.779.5

us-gaap:VariableInterestEntityPrimaryBeneficiary


Stockholders
Period End2021-06-30
Value2200
Percentage of StockholdersEquity30.6
Percentage of Assets8.9
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary75.5

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value719967736688583552004290485646504527428039133915392731093145303129712874281027802619258125202458243225492522243824572013197718431790178417751744168716651683133713461215
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.230.730.926.824.422.425.125.524.823.723.625.925.819.923.120.520.019.321.822.320.720.121.320.419.722.125.423.823.123.122.922.122.722.230.229.528.025.825.519.725.923.2

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

esgr:CommonClassE, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value0.910.910.910.910.910.910.910.910.910.910.910.910.910.4050.4050.4050.4050.4050.4050.4050.4050.4050.4050.7140.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets esgr:CommonClassE us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

esgr:VotingCommonStock, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value1818181818181817171717171716161616161616161616161515151313
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.30.30.30.30.40.40.40.40.40.40.50.50.50.50.50.50.60.60.60.60.60.60.60.70.70.60.60.70.8
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.2
Percentage of Assets esgr:VotingCommonStock us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassC, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value2.692.692.62.62.62.62.62.62.62.62.62.62.62.62.62.62.62.62.7922.7262.7262.9732.7262.7262.7262.7262.726
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassC us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SeriesCPreferredStock, us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value0.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.3890.00.00.00.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:SeriesCPreferredStock us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SeriesDPreferredStock, us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value4004004004004004004004004004004004004000.00.00.00.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest5.65.96.06.97.79.38.28.68.89.310.210.210.20.00.00.00.00.00.0
Percentage of Assets1.61.81.81.81.92.12.12.22.22.22.42.62.60.00.00.00.00.00.0
Percentage of Assets us-gaap:SeriesDPreferredStock us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SeriesEPreferredStock, us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value1101101101101101101101101101101100.00.00.00.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest1.51.61.61.92.12.62.32.42.42.62.80.00.00.00.00.00.0
Percentage of Assets0.40.50.50.50.50.60.60.60.60.60.70.00.00.00.00.00.0
Percentage of Assets us-gaap:SeriesEPreferredStock us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

esgr:JointOwnershipPlanVotingOrdinaryShares


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value-0.566-0.566-0.566-0.566-0.566-0.5660.00.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.0
Percentage of Assets esgr:JointOwnershipPlanVotingOrdinaryShares0.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-312014-12-312013-12-31
Value0.2070.2070.207-0.945-0.945-0.945-0.945-1.938-0.987-0.987-0.987-3.143-3.143-3.143-3.143-4.644-4.644-4.644-7.723-7.726-2.249
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.3-0.3-0.1
Percentage of Assets0.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.0
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value24-26.541725345-41.573-0.4320.8411.0364.0830.441-0.1281.1662.1462.442.5960.773-0.0230.0885.3283.9331.814-3.649-5.438-3.678-2.1811.963
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.3-0.41.10.90.9-1.0-0.00.00.00.10.0-0.00.00.10.10.10.0-0.00.00.20.20.1-0.1-0.2-0.2-0.10.1
Percentage of Assets0.1-0.10.30.20.2-0.2-0.00.00.00.00.0-0.00.00.00.00.00.0-0.00.00.00.00.0-0.0-0.0-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value33-17.715806151-34.6567.1715.499.19613109.17101110-5.161-18.611-21.727-23.549-17.333-21.527-19.104-35.162-35.507-21.473-30.025-12.6863.98181413146.5292124272630272550413533-6.4168.709-30.871
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.5-0.31.21.11.0-0.80.10.10.20.30.30.20.30.40.3-0.2-0.6-0.8-0.8-0.6-0.8-0.7-1.4-1.4-0.9-1.2-0.50.20.80.70.70.80.41.21.41.61.61.91.61.93.70.02.90.00.00.00.0
Percentage of Assets0.1-0.10.40.30.2-0.20.00.00.10.10.10.10.10.10.1-0.0-0.1-0.1-0.2-0.1-0.2-0.1-0.3-0.3-0.2-0.3-0.10.00.20.20.20.20.10.30.40.50.40.50.40.41.00.00.70.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value8.0548.6197.8769.3016.8247.8628.5486.5879.147101012121211-3.113-14.74-17.06-18.993-14.938-17.737-13.195-23.79-22.343-10.069-2.77914
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.10.10.20.10.20.20.10.20.20.30.30.30.40.4-0.1-0.5-0.6-0.7-0.5-0.7-0.5-0.9-0.9-0.4-0.10.7
Percentage of Assets0.00.00.00.00.00.00.00.00.10.10.10.10.10.10.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.1-0.00.2
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value18351836183618321835182518361830182218091804181218081400139513911386138213801379137613731373136913651323132113201317962962961960959958959958957956775774668667727727721709
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest25.527.127.531.435.342.637.839.440.242.346.146.346.045.044.345.946.748.149.149.652.653.254.555.756.151.952.454.253.647.848.752.153.653.854.055.056.857.556.858.057.50.054.90.00.00.00.0
Percentage of Assets7.58.38.58.48.69.59.510.110.010.010.912.011.99.010.39.49.39.310.711.110.910.711.611.411.111.513.312.912.411.111.211.512.211.916.316.215.914.814.511.414.90.012.80.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value1212131413131412121212109.7279.2769.264109.4189.2178.523.4773.6413.893.9112034215217223258227222225221220221256249264297264261253267289289274256
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.20.20.20.20.30.30.30.30.30.30.30.30.20.30.30.30.30.30.30.10.10.20.20.81.48.48.69.210.511.311.212.212.412.412.514.714.815.917.719.819.40.022.00.00.00.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.20.31.92.22.22.42.62.62.72.82.73.84.34.14.14.53.95.00.05.10.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value520848314647381631902375288726912573233519762083209820892132203719961905184718171662162215781503145414401395128912621211118110431004984972902855814804676664654651526505477341
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest72.371.369.565.461.355.459.557.956.854.650.553.253.467.267.867.267.266.365.765.363.562.962.661.259.856.555.352.951.460.259.756.656.155.254.851.850.748.947.850.549.30.053.60.00.00.00.0
Percentage of Assets21.221.921.517.515.012.414.914.814.112.911.913.813.813.415.713.813.512.814.414.613.112.613.312.511.812.514.012.611.913.913.712.512.712.216.515.314.212.612.210.012.80.012.40.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities, us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

srt:ParentCompany, esgr:CommonClassE


Common
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.910.910.910.405
Percentage of CommonStockValue100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0
Percentage of Assets srt:ParentCompany esgr:CommonClassE0.00.00.00.0

srt:ParentCompany, esgr:VotingCommonStock


Common
Period End2020-12-312019-12-312018-12-312017-12-31
Value18181716
Percentage of CommonStockValue2041.31978.21972.54049.9
Percentage of Assets0.10.10.10.1
Percentage of Assets srt:ParentCompany esgr:VotingCommonStock0.00.00.00.0

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

esgr:CommonClassE


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value0.910.910.910.910.910.910.910.910.910.910.910.910.910.4050.4050.4050.4050.4050.4050.405
Percentage of CommonStockValue0.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets esgr:CommonClassE0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

esgr:VotingCommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1818181818181817171717171716161616161616161616151313131313131313131312
Percentage of CommonStockValue0.00.02041.30.00.00.01978.20.00.00.01972.50.00.00.04049.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.30.2
Percentage of Assets esgr:VotingCommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassC


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value2.692.692.62.62.62.62.62.62.62.62.62.62.62.62.62.62.62.62.7922.7262.7262.726
Percentage of CommonStockValue0.00.0285.70.00.00.0285.70.00.00.0285.70.00.00.0642.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1835183618361832183518251836183018221809180418121808140013951391138613821380137913761373
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.58.38.58.48.69.59.510.110.010.010.912.011.99.010.39.49.39.310.711.110.911.6

us-gaap:AdditionalPaidInCapital us-gaap:ConsolidatedEntities

srt:ParentCompany


Additional
Period End2020-12-312019-12-312018-12-312017-12-31
Value1836183618041395
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0
Percentage of Assets8.59.510.910.3
Percentage of Assets srt:ParentCompany23.229.636.935.3

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value520848314647381631902375288726912573233519762083209820892132203719961905184718171662162215781503145414401395128912621211118110431004984972902855814804676664651
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.221.921.517.515.012.414.914.814.112.911.913.813.813.415.713.813.512.814.414.613.112.613.312.511.812.514.012.611.913.913.712.512.712.216.515.314.212.612.210.012.812.4

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:ConsolidatedEntities

srt:ParentCompany


Retained
Period End2020-12-312019-12-312018-12-312017-12-31
Value4647288719762132
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0
Percentage of Assets21.514.911.915.7
Percentage of Assets srt:ParentCompany58.746.640.454.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value33-17.715806151-34.6567.1715.499.19613109.17101110-5.161-18.611-21.727-23.549-17.333-21.527-19.104-35.162-35.507-21.473-30.025-12.6863.98181413146.529212427263027255035
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.1-0.10.40.30.2-0.20.00.00.10.10.10.10.10.10.1-0.0-0.1-0.1-0.2-0.1-0.2-0.1-0.3-0.3-0.2-0.3-0.10.00.20.20.20.20.10.30.40.50.40.50.40.41.00.7

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities

srt:ParentCompany


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value807.1711010
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0
Percentage of Assets0.40.00.10.1
Percentage of Assets srt:ParentCompany1.00.10.20.3

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1212131413131412121212109.7279.2769.264109.4189.2178.523.4773.6413.893.9112034215217223258227222225221220221256249264297264261267
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.20.31.92.22.22.42.62.62.72.82.73.84.34.14.14.53.95.05.1

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueNewIssues

esgr:VotingCommonStock, us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.0050.0380.020.0060.0250.7010.0210.0060.0170.0080.0160.0041.5170.0110.0110.0050.0050.0140.0040.0040.0040.030.0050.0040.0040.05
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets esgr:VotingCommonStock us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

esgr:JointOwnershipPlanVotingOrdinaryShares


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.00.0-0.5660.00.0
Percentage of StockIssuedDuringPeriodValueNewIssues0.00.00.0-80.70.00.0
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets esgr:JointOwnershipPlanVotingOrdinaryShares0.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302012-06-302012-03-312011-06-302011-03-31
Value0.503-0.109-1.251-0.9140.5760.4550.466-0.5380.475413-0.094-0.1970.5810.1280.1521050.126
Percentage of StockIssuedDuringPeriodValueNewIssues8383.3-436.0-178.5-4352.49600.02676.55825.0-3362.511875.027244.4-854.5-1790.911620.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302011-09-302010-09-30
Value5.9287.2674.5159.2949.4262.7047.1857.729123.977-3.6634.4524.6595.6514.0354.3163.3342.8231.2142.1360.3640.2383.3631.6830.00.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302016-12-312016-09-302015-12-312015-09-302014-12-31
Value0.6340.00.00.00.414.2
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.00.00.00.0100.0100.0
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value12546911581123544-11.467107-251.027203-38.336-74.214139-219.697-168.41-94.13935-21.837-65.037-151.295272-59.40663-114.177-22.0151068-69.574-172.508-14.047-226.38-210.799-182.387-290.3542065
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11633.26903.62100.312471.28267.2-185.61603.6-2191.42928.1-459.0-890.8708.9-1382.2-902.2-790.217.0-6.1-19.7-48.0125.1-22.247.4-92.8-28.313.0182.5-139.5-708.2-29.3-809.8-1815.8-603.2-743.554.5198.9

us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Net
Period End2021-06-30
Value1228
Percentage of NetCashProvidedByUsedInOperatingActivities0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14847.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-854.895-767.959-388.18-1404.497-425.23719-173.007-414.402-306.351125-230.229129437743-64.429399387-332.14991-102.22-8.6815-270.6753150171-25.03419510920118419117
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7925.2-7671.9-5156.5-15593.4-6455.7310.8-2589.5-3617.7-4407.91499.4-2763.5657.6270.6415.4366.3-30.911.128.427.7-152.634.3-76.6-7.120.3-332.382.8101.3705.8-52.1701.0946.4666.9472.351.7358.2

us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Net
Period End2021-06-30
Value574
Percentage of NetCashProvidedByUsedInInvestingActivities0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6938.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-16.767-23.15-117.001-8.925328-16.104-296.127372232617-50.2-26.973212-7.9379.319-122.95856115-45.7534-20.5-129.0-79.328157400.0225-91.6770.0-130.846-11.25102106106-56.7-66.316-87.944
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-202.6-241.2-1084.6-89.24364.4-178.8-4495.66036.13485.45392.0-722.3-323.02550.8-40.458.6-658.7470.955.4-12.710.3-6.5-59.3-29.6117.733.10.0276.6-243.30.0-537.1-23.4368.1919.3353.3-145.2-172.6-267.2

us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Net
Period End2021-06-30
Value-800.0
Percentage of NetCashProvidedByUsedInFinancingActivities4771.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-9668.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1133-600.623263259-88.026105-285.136-182.872378163-45.425-155.58447-76.873263-161.714-202.905-4.679027
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13694.7-6257.81869.12405.1-879.41397.4-3165.7-2776.36120.72440.8-396.6-2238.6570.3-922.71342.4-1017.4-1087.0-39.243.37.6

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Cash
Period End2021-06-30
Value1002
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect88.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12116.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.0

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value349000.0256000.0417000.0351000.0343000.0220000.0414000.0311000.0282000.0273000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value201717121811108.8518.0487.98.0197.683106.7033.536109.4959.302-0.51111101312391.3231.4212.711.0631.8080.2110.2940.2560.2510.2540.4650.3730.3140.3170.3990.4230.3870.3840.4630.679
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value35219-201.915-155.235-154.376122-85.3333218-19.441-125.067-48.935219200-45.303-214.4677.447-8.345275-255.2188644102157
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Increase
Period End2021-06-30
Value0.415
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet1.2

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value12546911581123544-11.467107-251.027203-38.336-74.214139-219.697-168.41-94.13935-21.837-65.037-151.295272-59.40663-114.177-22.0151068-69.574-172.508-14.047-226.38-210.799-182.387-290.3542065
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11633.26903.62100.312471.28267.2-185.61603.6-2191.42928.1-459.0-890.8708.9-1382.2-902.2-790.217.0-6.1-19.7-48.0125.1-22.247.4-92.8-28.313.0182.5-139.5-708.2-29.3-809.8-1815.8-603.2-743.554.5198.9

us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Net
Period End2021-06-30
Value1228
Percentage of NetCashProvidedByUsedInOperatingActivities0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14847.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value386192831623807-507.896202126240367-106.423-10.8328.244-41.211273890542215640451114914441052651291373919116947409.674128129.3753.503124211215
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4668.22001.75888.65784.28066.7-6746.82251.21923.03897.25506.5-929.1-155.998.7-494.7650.1245.3483.1459.010.843.512.314.451.418.35.715.647.512.417.523.2103.032.524.614.7185.595.7167.220.1460.5103.931.09.0323.565.155.837.5

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-12.83-11.625-4.209-16.796-6.623-10.184-9.949-6.351-1.115-8.356
Percentage of NetIncomeLoss-1.5-1.9-0.53.3-3.3-8.0-4.1-1.71.077.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-90.9-107.8-42.0-223.1-73.5-154.6-161.0-95.1-9.7-120.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value5.8264.38911-5.5623.314-1.7656.0794.4973.5351.962-6.0734.4393.111.3262.8141.8080.4680.656.0671.394
Percentage of NetIncomeLoss0.70.71.41.11.6-1.42.51.2-3.3-18.1-15.64.95.75.91.84.51.00.612.49.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax41.340.7112.6-73.936.8-26.898.467.330.928.2-38.223.826.10.60.80.50.10.32.30.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment80.461.4186.5-218.775.5-73.8396.5243.243.760.5-102.70.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value865623826-449.026239141277400-11.935327010134131422525
Percentage of NetIncomeLoss104.0100.0102.388.4118.3111.6115.4108.911.2-301.2181.2112.362.659.191.363.255.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6125.85782.98255.0-5964.72663.82145.54496.85998.3-104.2469.5444.5542.5287.36.439.77.88.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment12584.017151.620835.2-9007.55193.23368.05980.98293.6-353.8879.9656.50.00.00.00.00.00.0

us-gaap:OperatingSegments, esgr:StarStoneSegment


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-26.4957.369-25.909-36.512-33.853-2.704-33.175-31.001-96.908-37.066-20.0978.529100.0375.637.9891115-2.226-2.9923.3378.676-12.261
Percentage of NetIncomeLoss-3.21.2-3.27.2-16.7-2.1-13.8-8.491.1342.2-51.59.519.10.23.619.725.413.9-4.5-20.67.48.2-46.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-187.668.3-258.8-485.0-375.9-41.1-537.0-464.0-846.0-533.3-126.445.787.70.01.62.43.77.1-0.8-1.21.23.9-5.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value389202834645787-540.618197126238365-149.378-22.321-0.145-40.4281332410172291704954924618531182154331424325127955401516622155.074148252317
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4705.22114.15910.75987.37867.0-7181.42196.81921.33853.35474.4-1304.0-321.2-1.7-485.3681.7152.0545.0605.214.247.515.117.342.617.27.118.653.110.018.326.2106.635.332.415.9211.7111.2167.732.1594.9189.949.713.0387.378.5105.441.5

us-gaap:ProfitLoss us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Profit
Period End2021-06-30
Value196
Percentage of ProfitLoss50.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2375.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.0

us-gaap:ProfitLoss us-gaap:ConsolidationItems

esgr:CorporateAndReconcilingItems


Profit
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-12.83-11.625-4.209-6.623-10.184-9.949-6.351-1.115-8.356-13.159-3.237.106-15.019
Percentage of ProfitLoss-1.5-1.8-0.5-3.3-8.0-4.2-1.70.737.49075.28.05.3-62.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-90.9-107.8-42.0-73.5-154.6-161.0-95.1-9.7-120.2-157.6-38.836.2-94.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CorporateAndReconcilingItems0.00.00.00.00.00.00.00.00.00.00.0602.71930.5

us-gaap:ProfitLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, esgr:AtriumSegment


Profit
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302015-09-302015-06-30
Value9.8617.3855.619-2.993107.6255.9943.2282.6523.386.692-10.2962.2484.7723.066103.376
Percentage of ProfitLoss1.21.12.8-2.44.32.1-4.0-14.5-1829.0-8.45.0-42.67.62.86.222.618.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.868.562.4-45.4166.8114.152.346.431.840.634.1-64.81.11.30.93.91.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:AtriumSegment136.1103.3128.1-125.2672.3412.474.299.668.698.5123.1-174.20.00.00.00.00.0

us-gaap:OperatingSegments, esgr:NonlifeRunoffSegment


Profit
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value863626239142280403-13.013442-35.43211383
Percentage of ProfitLoss103.597.0121.3112.8117.7110.38.7-153.6-29299.387.684.7345.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6118.15806.32664.42167.34533.56037.9-113.6493.3508.7-425.3577.5525.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:NonlifeRunoffSegment12568.117220.95194.53402.36029.78348.3-385.7924.7946.8-723.4836.7775.8

us-gaap:OperatingSegments, esgr:StarStoneSegment


Profit
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-26.30623-41.116-3.024-42.381-38.923-141.247-51.48-32.122-5.1466.659-34.020.0599.547131926-3.774-5.0735.65814-20.912
Percentage of ProfitLoss-3.23.7-20.8-2.4-17.8-10.694.6230.622153.112.75.0-140.80.25.627.235.928.5-8.2-27.910.612.4-98.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-186.3220.3-456.5-45.9-686.0-582.6-1233.1-740.7-384.6-61.833.9-214.00.02.74.16.212.1-1.4-2.02.06.6-9.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments esgr:StarStoneSegment0.00.00.00.00.00.00.00.00.00.0-1247.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:CounterpartyName

esgr:AnglePoint


Profit
Period End2021-06-30
Value196
Percentage of ProfitLoss50.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2375.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AnglePoint0.0

esgr:StonePointAndAffiliatedEntities


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2625653834-98.4324.05-1.1851121-14.585105.737
Percentage of ProfitLoss6.912.57.95.94.418.22.0-0.94.75.89.8-46.5-3956.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax323.1264.4465.6354.5344.9-1307.545.0-18.0180.1317.4-127.3149.468.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:StonePointAndAffiliatedEntities0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

esgr:AmTrustFinancialServicesInc., srt:AffiliatedEntity


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.040.001-12.0390.0455.852.326121.91.829
Percentage of ProfitLoss0.00.0-1.40.00.7-0.46.21.50.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.0-85.30.458.430.9135.528.829.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AmTrustFinancialServicesInc. srt:AffiliatedEntity0.00.00.00.00.00.00.00.00.0

esgr:ClearSpring, srt:AffiliatedEntity


Profit
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-0.361-1.10.674-2.019-0.515-1.18-1.707-1.7670.238
Percentage of ProfitLoss-0.1-0.1-0.1-1.6-0.2-0.37.61218.6-0.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.3-11.09.0-30.7-8.3-17.7-24.6-21.22.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:ClearSpring srt:AffiliatedEntity0.00.00.00.00.00.00.00.00.0

esgr:CoreSpecialty, srt:AffiliatedEntity


Profit
Period End2021-06-302021-03-31
Value5.73817
Percentage of ProfitLoss1.58.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.3185.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:CoreSpecialty srt:AffiliatedEntity0.00.0

esgr:EnhanzedRe, srt:AffiliatedEntity


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.102-0.722-6.881.729-3.1850.3140.420.150.1660.086
Percentage of ProfitLoss-0.0-0.4-0.80.3-0.4-0.10.20.10.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.2-7.5-48.716.0-31.84.24.72.32.71.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:EnhanzedRe srt:AffiliatedEntity0.00.00.00.00.00.00.00.00.00.0

esgr:NorthshoreHoldingsLimited, srt:AffiliatedEntity


Profit
Period End2021-06-302020-03-31
Value-0.0550.318
Percentage of ProfitLoss-0.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.74.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:NorthshoreHoldingsLimited srt:AffiliatedEntity0.00.0

us-gaap:ProfitLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Profit
Period End2021-06-302021-03-312020-06-302020-03-31
Value5.623-11.90614-13.424
Percentage of ProfitLoss1.4-5.91.92.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax68.0-124.0149.7-178.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.0

us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

esgr:AtriumSyndicate609


Profit
Period End2021-06-302021-03-31
Value-1.4320.341
Percentage of ProfitLoss-0.40.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17.33.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax esgr:AtriumSyndicate6090.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-854.895-767.959-388.18-1404.497-425.23719-173.007-414.402-306.351125-230.229129437743-64.429399387-332.14991-102.22-8.6815-270.6753150171-25.03419510920118419117
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7925.2-7671.9-5156.5-15593.4-6455.7310.8-2589.5-3617.7-4407.91499.4-2763.5657.6270.6415.4366.3-30.911.128.427.7-152.634.3-76.6-7.120.3-332.382.8101.3705.8-52.1701.0946.4666.9472.351.7358.2

us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Net
Period End2021-06-30
Value574
Percentage of NetCashProvidedByUsedInInvestingActivities0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6938.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.0

Payments To Acquire Investments

us-gaap:PaymentsToAcquireInvestments

us-gaap:PaymentsToAcquireInvestments


Payments
Period End2021-03-15
Value27
Percentage of PaymentsToAcquireInvestments100.0

us-gaap:PaymentsToAcquireInvestments dei:LegalEntity

esgr:Trident


Payments
Period End2021-03-15
Value18
Percentage of PaymentsToAcquireInvestments66.7

us-gaap:PaymentsToAcquireInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario

esgr:EnhanzedRe, srt:ScenarioForecast


Payments
Period End2021-12-31
Value228
Percentage of PaymentsToAcquireInvestments0.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-16.767-23.15-117.001-8.925328-16.104-296.127372232617-50.2-26.973212-7.9379.319-122.95856115-45.7534-20.5-129.0-79.328157400.0225-91.6770.0-130.846-11.25102106106-56.7-66.316-87.944
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-202.6-241.2-1084.6-89.24364.4-178.8-4495.66036.13485.45392.0-722.3-323.02550.8-40.458.6-658.7470.955.4-12.710.3-6.5-59.3-29.6117.733.10.0276.6-243.30.0-537.1-23.4368.1919.3353.3-145.2-172.6-267.2

us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Net
Period End2021-06-30
Value-800.0
Percentage of NetCashProvidedByUsedInFinancingActivities4771.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-9668.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityPrimaryBeneficiary0.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312011-12-312011-09-302010-12-312010-09-30
Value0.020-0.2764940.0364-0.30620706344691662834534045524374170.01540.01201632651090.00.00.07095470.02270.010611525
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0100.0100.0