Significant Accounting Policies (Policies)	6 Months Ended
Significant Accounting Policies (Policies)	Jun. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation, Policy	Basis of Presentation – The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with the instructions to Form 10-Q. As permitted by the rules and regulations of the United States Securities and Exchange Commission, the unaudited condensed consolidated financial statements contain certain condensed financial information and exclude certain footnote disclosures normally included in audited consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP"). The accompanying condensed consolidated financial statements are unaudited and are prepared in accordance with U.S. GAAP. In the opinion of the Company's management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, including normal recurring accruals, necessary to fairly present the accompanying unaudited condensed consolidated financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company's annual report on Form 10-K for the year ended December 31, 2017. The December 31, 2017 Unaudited Condensed Consolidated Statement of Financial Condition data was derived from audited consolidated financial statements, but does not include all disclosures required by U.S. GAAP. Operating results for the interim periods are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2018. The accompanying unaudited condensed consolidated financial statements of the Company are comprised of the consolidation of Evercore LP and Evercore LP's wholly-owned and majority-owned direct and indirect subsidiaries, including Evercore Group L.L.C. ("EGL"), a registered broker-dealer in the U.S. The Company's policy is to consolidate all subsidiaries in which it has a controlling financial interest, as well as any variable interest entities ("VIEs") where the Company is deemed to be the primary beneficiary, when it has the power to make the decisions that most significantly affect the economic performance of the VIE and has the obligation to absorb significant losses or the right to receive benefits that could potentially be significant to the VIE. The Company reviews factors, including the rights of the equity holders and obligations of equity holders to absorb losses or receive expected residual returns, to determine if the investment is a VIE. In evaluating whether the Company is the primary beneficiary, the Company evaluates its economic interests in the entity held either directly or indirectly by the Company. The consolidation analysis is generally performed qualitatively. This analysis, which requires judgment, is performed at each reporting date. Evercore LP is a VIE and the Company is the primary beneficiary. Specifically, the Company has the majority economic interest in Evercore LP and has decision making authority that significantly affects the economic performance of the entity while the limited partners have no kick-out or substantive participating rights. The assets and liabilities of Evercore LP represent substantially all of the consolidated assets and liabilities of the Company with the exception of U.S. corporate taxes and related items, which are presented on the Company's (Parent Company Only) Condensed Statements of Financial Position in Note 23 to the Company's consolidated financial statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2017. International Strategy & Investment (U.K.) Limited ("ISI U.K.") and Evercore Partners International LLP ("Evercore U.K.") are also VIEs and the Company is the primary beneficiary of these VIEs. Specifically for ISI U.K., the Company provides financial support through a transfer pricing agreement with this entity, which exposes the Company to losses that are potentially significant to the entity, and has decision making authority that significantly affects the economic performance of the entity. The Company has the majority economic interest in Evercore U.K. and has decision making authority that significantly affects the economic performance of this entity. The Company included in its Unaudited Condensed Consolidated Statements of Financial Condition ISI U.K. and Evercore U.K. assets of $96,871 and liabilities of $68,714 at June 30, 2018 and assets of $126,078 and liabilities of $102,487 at December 31, 2017. All intercompany balances and transactions with the Company's subsidiaries have been eliminated upon consolidation
Revenue Recognition, Policy [Policy Text Block]	The Company adopted ASU No. 2014-09, "Revenue from Contracts with Customers" ("ASU 2014-09") on January 1, 2018 using the modified retrospective method of transition. The Company did not have a cumulative-effect adjustment as of the date of adoption. Following the adoption of ASU 2014-09, the Company’s accounting policies are as follows: ASU 2014-09 provides a five step model to revenue recognition: Step 1: Identify the contract(s) with a customer Step 2: Identify the performance obligations in the contract Step 3: Determine the transaction price Step 4: Allocate the transaction price to the performance obligations in the contract Step 5: Recognize revenue when (or as) the entity satisfies a performance obligation The Company applies this model to its Investment Banking and Asset Management revenue streams. Investment Banking Revenue - The Company earns investment banking fees from clients for providing advisory services on strategic matters, including mergers, acquisitions, divestitures, leveraged buyouts, restructurings, activism and defense and similar corporate finance matters. The Company's Investment Banking services also include services related to securities underwriting, private placement services and commissions for agency-based equity trading services and equity research. Revenue is recognized as the Company satisfies performance obligations, upon transfer of control of promised services to customers in an amount that reflects the consideration the Company expects to receive in exchange for these services. The Company’s contracts with customers may include promises to transfer multiple services to a customer. Determining whether services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. For performance obligations satisfied over time, determining a measure of progress requires the Company to make significant judgments that affect the timing of revenue recognized. For certain advisory services, the Company has concluded that performance obligations are satisfied over time. This is based on the premise that the Company transfers control of services and the client simultaneously receives benefits from these services over the course of an engagement. For performance obligations satisfied at a point in time, determining when control transfers requires the Company to make significant judgments that affect the timing of when revenue is recognized. The Company records Investment Banking Revenue on the Unaudited Condensed Consolidated Statements of Operations for the following: Advisory Fees - In general, advisory fees are paid at the time the Company signs an engagement letter, during the course of the engagement or when an engagement is completed. In some circumstances, and as a function of the terms of an engagement letter, the Company may receive fixed retainer fees for financial advisory services concurrent with, or soon after, the execution of the engagement letter or over the course of the engagement, where the engagement letter will specify a future service period associated with those fees. The Company may also receive announcement fees upon announcement of a transaction in addition to success fees upon closing of a transaction or another defined outcome, both of which represent variable consideration. This variable consideration will be included in the transaction price, as defined, to the extent that it is probable that a significant reversal of revenue will not occur. With respect to retainer, announcement and success fees, there are no distinct performance obligations aside from advisory activities, which are generally focused on achieving a milestone (typically, the announcement and/or the closing of a transaction). These advisory services are provided over time throughout the contract period. The Company will recognize revenue when distinct services are performed and when it is probable that a reversal of revenue will not occur, which is generally upon the announcement or closing of a transaction. In circumstances in which retainer fees are received in advance of services, these fees are initially recorded as deferred revenue (a contract liability), which is recorded in Other Current Liabilities on the Unaudited Condensed Consolidated Statements of Financial Condition, and subsequently recognized as advisory fee revenue in Advisory Fees on the Unaudited Condensed Consolidated Statements of Operations during the applicable time period within which the service is rendered. Announcement fees for advisory services are recognized upon announcement (the point at which it is determined that the reversal of revenue is not probable) and all other requirements for revenue recognition are satisfied. A portion of the announcement fee may be deferred based on the services remaining to be completed, if any. Success fees for advisory services, such as merger and acquisition advice, are recognized when it is determined that the reversal of revenue is not probable and all other requirements for revenue recognition are satisfied, which is generally at closing of the transaction. With respect to fairness or valuation opinions, fees are fixed and there is a distinct performance obligation, since the opinion is rendered separate from any other advisory activities. Revenues related to fairness or valuation opinions are recognized at the point in time when the opinion has been rendered and delivered to the client. In the event the Company was to receive an opinion or success fee in advance of the completion conditions noted above, such fee would initially be recorded as deferred revenue (a contract liability) in Other Current Liabilities on the Unaudited Condensed Consolidated Statements of Financial Condition and subsequently recognized as advisory fee revenue in Advisory Fees on the Unaudited Condensed Consolidated Statements of Operations when the conditions of completion have been satisfied. Placement fee revenues are attributable to capital raising on both corporations and financial sponsors. The Company recognizes placement fees in accordance with the terms of the engagement letter, which are generally contingent on the achievement of a capital commitment by an investor, at the time of the client's acceptance of capital or capital commitments. Underwriting Fees - Underwriting fees are attributable to public and private offerings of equity and debt securities and are recognized at the point in time when the offering has been deemed to be completed by the lead manager of the underwriting group. When the offering is completed, the performance obligation has been satisfied and the Company recognizes the applicable management fee, selling concession and underwriting fee. Estimated offering expenses are presented gross in the Unaudited Condensed Consolidated Statements of Operations. Commissions and Related Fees - Commissions and Related Fees include commissions received from customers for the execution of agency-based brokerage transactions in listed and over-the-counter equities. The execution of each trade order represents a distinct performance obligation and the transaction price at the point in time of trade order execution is fixed. Trade execution is satisfied at the point in time that the customer has control of the asset and as such, fees are recorded on a trade date basis or, in the case of payments under commission sharing arrangements, when earned. The Company also earns subscription fees for the sales of research. The delivery of research under subscription arrangements represents a distinct performance obligation that is satisfied over time. The fees are fixed and are recognized over the period in which the performance obligation is satisfied. Cash received before the subscription period ends is initially recorded as deferred revenue (a contract liability) in Other Current Liabilities on the Unaudited Condensed Consolidated Statements of Financial Condition, and is recognized in Commissions and Related Fees on the Unaudited Condensed Consolidated Statements of Operations ratably over the period in which the related services are rendered. Taxes collected from customers and remitted to governmental authorities are presented on a net basis on the Consolidated Statements of Operations. Asset Management and Administration Fees - The Company's Investment Management business generates revenues from the management of client assets and through interests in private equity funds which are not managed by the Company. The Company’s contracts with customers may include promises to transfer multiple services to a customer. Determining whether services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. For performance obligations satisfied over time, determining a measure of progress requires the Company to make significant judgments that affect the timing of revenue recognized. Asset management fees for third-party clients are generally based on the value of the assets under management and any performance fees that may be negotiated with the client. The management of asset portfolios represents a distinct performance obligation that is satisfied over time. These fees are generally recognized over the period that the related services are provided and in which the performance obligation is satisfied, based upon the beginning, ending or average value of the assets for the relevant period. Fees paid in advance of services rendered are initially recorded as deferred revenue (a contract liability), which is recorded in Other Current Liabilities on the Unaudited Condensed Consolidated Statements of Financial Condition, and are recognized in Asset Management and Administration Fees on the Unaudited Condensed Consolidated Statements of Operations ratably over the period in which the related service is rendered. Generally, to the extent performance fee arrangements have been negotiated, these fees are earned when the likelihood of clawback is mathematically improbable. Fees generated for serving as an independent fiduciary and/or trustee are either based on a flat fee, are pre-negotiated with the client or are based on the value of assets under administration. The management of assets under administration represents a distinct performance obligation that is satisfied over time. For ongoing engagements, fees are billed quarterly either in advance or in arrears. Fees paid in advance of services rendered and satisfaction of the performance obligation are initially recorded as deferred revenue (a contract liability) in Other Current Liabilities on the Unaudited Condensed Consolidated Statements of Financial Condition, and are recognized in Asset Management and Administration Fees on the Unaudited Condensed Consolidated Statements of Operations ratably over the period in which the related services are rendered and the performance obligation is satisfied. The Company records performance fee revenue from the private equity funds when the returns on the private equity funds' investments exceed certain threshold minimums. These performance fees, or carried interest, are computed in accordance with the underlying private equity funds' partnership agreements and are based on investment performance over the life of each investment partnership. The Company records performance fees upon the earlier of the termination of the investment fund or when the likelihood of clawback is mathematically improbable.
Receivables, Policy [Policy Text Block]	Accounts Receivable and Contract Assets - Accounts Receivable consists primarily of investment banking fees and expense reimbursements charged to the Company's clients. The Company records Accounts Receivable, net of any allowance for doubtful accounts, when relevant revenue recognition criteria has been achieved and payment is conditioned on the passage of time. The Company maintains an allowance for doubtful accounts to provide coverage for estimated losses from its client receivables. The Company determines the adequacy of the allowance by estimating the probability of loss based on the Company's analysis of the client's creditworthiness and specifically reserves against exposure where the Company determines the receivables are impaired, which may include situations where a fee is in dispute or litigation has commenced. The Investment Banking and Investment Management receivables collection periods generally are within 90 days of invoice, with the exception of placement fees, which are generally collected within 180 days of invoice, and fees related to private funds capital raising, which are collected in a period exceeding one year. The collection period for restructuring transactions and private equity fee receivables may exceed 90 days. Receivables that are collected in a period exceeding one year are reflected in Other Assets on the Unaudited Condensed Consolidated Statement of Financial Condition. The Company records contract assets within Other Current Assets on the Unaudited Condensed Consolidated Statement of Financial Condition when payment is due from a client conditioned on future performance or the occurrence of other events. The Company also recognizes a contract asset for the incremental costs of obtaining a contract with a customer if the benefit of those costs is expected to be longer than one year. The Company applies a practical expedient to expense costs to obtain a contract as incurred when the amortization period is one year or less.

Disclosure of accounting policy for trade and other accounts receivable, and finance, loan and lease receivables, including those classified as held for investment and held for sale. This disclosure may include (1) the basis at which such receivables are carried in the entity's statements of financial position (2) how the level of the valuation allowance for receivables is determined (3) when impairments, charge-offs or recoveries are recognized for such receivables (4) the treatment of origination fees and costs, including the amortization method for net deferred fees or costs (5) the treatment of any premiums or discounts or unearned income (6) the entity's income recognition policies for such receivables, including those that are impaired, past due or placed on nonaccrual status and (7) the treatment of foreclosures or repossessions (8) the nature and amount of any guarantees to repurchase receivables.