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Income Taxes Reconciliation Between Statutory Federal Income Tax Rate and Effective Tax Rate (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]      
U.S. Statutory Tax Rate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Increase Due to State and Local Taxes 6.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 5.30%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 6.80%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Rate Benefits as a Limited Liability Company/Flow Through (4.20%)evr_RateBenefitsAsLimitedLiabilityCompanyFlowThrough (7.00%)evr_RateBenefitsAsLimitedLiabilityCompanyFlowThrough (6.90%)evr_RateBenefitsAsLimitedLiabilityCompanyFlowThrough
Foreign Taxes 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign 3.20%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign 2.20%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign
Non-Deductible Expenses (1) 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense [1] 3.40%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense [1] 9.40%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense [1]
Valuation Allowances 0.90%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance (2.00%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Write Down of Deferred Tax Asset 0.00%evr_IncomeTaxReconciliationWriteDownofDeferredTaxAssetPercent 6.80%evr_IncomeTaxReconciliationWriteDownofDeferredTaxAssetPercent 1.60%evr_IncomeTaxReconciliationWriteDownofDeferredTaxAssetPercent
Other Adjustments (0.20%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (0.70%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (2.20%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective Income Tax Rate 39.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 46.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 43.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations
[1] (1)Primarily related to non-deductible share-based compensation expense.