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Share-Based and Other Deferred Compensation - Additional information (Detail) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Management Basis EBIT Margin 15.00%evr_ManagementBasisEBITMargin    
Management Basis EBIT $ 31,500,000evr_ManagementBasisEBIT    
Class H Interests Performance Period 3 years    
Expense Related To Separation Benefits 1,608,000evr_ExpenseRelatedToSeparationBenefits 3,391,000evr_ExpenseRelatedToSeparationBenefits  
Cash Payments Related To Separation Benefits 1,210,000evr_CashPaymentsRelatedToSeparationBenefits 2,481,000evr_CashPaymentsRelatedToSeparationBenefits  
Long Term Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Long Term Incentive Plan Performance period (in years) 4 years    
Long Term Incentive Plan Payment period (in years) 2 years    
Deferred compensation arrangement compensation expense 1,513,000us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
/ us-gaap_AwardTypeAxis
= evr_LongTermIncentivePlanMember		 1,111,000us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
/ us-gaap_AwardTypeAxis
= evr_LongTermIncentivePlanMember		  
Employee Loans [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred compensation arrangement compensation expense 4,580,000us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
/ us-gaap_AwardTypeAxis
= evr_EmployeeLoansMember		 2,647,000us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
/ us-gaap_AwardTypeAxis
= evr_EmployeeLoansMember		  
Requisite service period (in years) one    
Maximum contractual term (in years) five    
Unamortized deferred compensation 24,992,000us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
/ us-gaap_AwardTypeAxis
= evr_EmployeeLoansMember		    
Equity Grants [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average grant date fair value (in dollars per share) $ 48.41us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= evr_EquityGrantsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		    
Equity Grants [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average grant date fair value (in dollars per share) $ 52.64us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= evr_EquityGrantsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		    
Equity Grants [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense related to Service-based Award 27,495,000evr_CompensationExpenseRelatedToServiceBasedAwards
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= evr_EquityGrantsMember		 22,244,000evr_CompensationExpenseRelatedToServiceBasedAwards
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= evr_EquityGrantsMember		  
Class H Interests [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Management Basis EBIT Margin 7.00%evr_ManagementBasisEBITMargin
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementClassOfStockAxis
= evr_ClassHInterestsMember		    
Management Basis EBIT 8,000,000evr_ManagementBasisEBIT
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementClassOfStockAxis
= evr_ClassHInterestsMember		    
Class H Interests [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Management Basis EBIT Margin 17.00%evr_ManagementBasisEBITMargin
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementClassOfStockAxis
= evr_ClassHInterestsMember		    
Management Basis EBIT 48,000,000evr_ManagementBasisEBIT
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementClassOfStockAxis
= evr_ClassHInterestsMember		    
Class G Interests [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Management Basis EBIT Margin 12.00%evr_ManagementBasisEBITMargin
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementClassOfStockAxis
= evr_ClassGInterestsMember		    
Class G Interests [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Management Basis EBIT Margin 16.00%evr_ManagementBasisEBITMargin
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementClassOfStockAxis
= evr_ClassGInterestsMember		    
Restricted Stock Units (RSUs) [Member] | Equity Grants [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued during period (in shares) 2,327us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= evr_EquityGrantsMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockUnitsRSUMember		    
Shares vested during period (in shares) 2,033us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_PlanNameAxis
= evr_EquityGrantsMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockUnitsRSUMember		    
Shares forfeited during period (in shares) 9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_PlanNameAxis
= evr_EquityGrantsMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockUnitsRSUMember		    
Deferred Cash Program [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred compensation, vesting period (in years) 4 years    
Compensation expense related to deferred compensation programs 560,000evr_CompensationExpenseRelatedToDeferredCompensationPrograms
/ us-gaap_StatementEquityComponentsAxis
= evr_DeferredCashProgramMember		 894,000evr_CompensationExpenseRelatedToDeferredCompensationPrograms
/ us-gaap_StatementEquityComponentsAxis
= evr_DeferredCashProgramMember		  
Acquisition Related [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense related to acquisition related awards 615,000evr_CompensationExpenseRelatedToAcquisitionRelatedAwards
/ us-gaap_StatementEquityComponentsAxis
= evr_AcquisitionRelatedMember		 2,241,000evr_CompensationExpenseRelatedToAcquisitionRelatedAwards
/ us-gaap_StatementEquityComponentsAxis
= evr_AcquisitionRelatedMember		  
Compensation expense related to deferred cash consideration (29,000)evr_CompensationExpenseRelatedToDeferredCashConsideration
/ us-gaap_StatementEquityComponentsAxis
= evr_AcquisitionRelatedMember		 932,000evr_CompensationExpenseRelatedToDeferredCashConsideration
/ us-gaap_StatementEquityComponentsAxis
= evr_AcquisitionRelatedMember		  
Class E LP Units [Member] | Evercore ISI [Member] | Acquisition Related [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense related to acquisition related awards 5,068,000evr_CompensationExpenseRelatedToAcquisitionRelatedAwards
/ us-gaap_BusinessAcquisitionAxis
= evr_EvercoreISIMember
/ us-gaap_CapitalUnitsByClassAxis
= evr_ClassELPUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= evr_AcquisitionRelatedMember		    
Class E LP Units [Member] | Evercore ISI [Member] | Vested LP Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Of LP Units (in units)     710evr_GrantOfLPUnits
/ us-gaap_AwardTypeAxis
= evr_VestedLPUnitsMember
/ us-gaap_CapitalUnitsByClassAxis
= evr_ClassELPUnitsMember
/ dei_LegalEntityAxis
= evr_EvercoreISIMember
Class E LP Units [Member] | Evercore ISI [Member] | Unvested LP Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Of LP Units (in units)     710evr_GrantOfLPUnits
/ us-gaap_AwardTypeAxis
= evr_UnvestedLPUnitsMember
/ us-gaap_CapitalUnitsByClassAxis
= evr_ClassELPUnitsMember
/ dei_LegalEntityAxis
= evr_EvercoreISIMember
Class G Interests [Member] | Evercore ISI [Member] | Vested LP Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Of LP Units (in units)     538evr_GrantOfLPUnits
/ us-gaap_AwardTypeAxis
= evr_VestedLPUnitsMember
/ us-gaap_CapitalUnitsByClassAxis
= evr_ClassGInterestsMember
/ dei_LegalEntityAxis
= evr_EvercoreISIMember
Class G Interests [Member] | Evercore ISI [Member] | Unvested LP Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Of LP Units (in units)     540evr_GrantOfLPUnits
/ us-gaap_AwardTypeAxis
= evr_UnvestedLPUnitsMember
/ us-gaap_CapitalUnitsByClassAxis
= evr_ClassGInterestsMember
/ dei_LegalEntityAxis
= evr_EvercoreISIMember
Class H Interests [Member] | Evercore ISI [Member] | Vested LP Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Of LP Units (in units)     2,044evr_GrantOfLPUnits
/ us-gaap_AwardTypeAxis
= evr_VestedLPUnitsMember
/ us-gaap_CapitalUnitsByClassAxis
= evr_ClassHInterestsMember
/ dei_LegalEntityAxis
= evr_EvercoreISIMember
Class H Interests [Member] | Evercore ISI [Member] | Unvested LP Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Of LP Units (in units)     2,051evr_GrantOfLPUnits
/ us-gaap_AwardTypeAxis
= evr_UnvestedLPUnitsMember
/ us-gaap_CapitalUnitsByClassAxis
= evr_ClassHInterestsMember
/ dei_LegalEntityAxis
= evr_EvercoreISIMember
Class G And H Interests [Member] | Evercore ISI [Member] | Acquisition Related [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense related to acquisition related awards $ 20,143,000evr_CompensationExpenseRelatedToAcquisitionRelatedAwards
/ us-gaap_BusinessAcquisitionAxis
= evr_EvercoreISIMember
/ us-gaap_CapitalUnitsByClassAxis
= evr_ClassGAndHInterestsMember
/ us-gaap_StatementEquityComponentsAxis
= evr_AcquisitionRelatedMember