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Employee Benefit Plans Employee Benefit Plans (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Payment for Pension Benefits |  | $ 124,000 | $ 137,000 | $ 165,000
Evercore Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount |  | 0 | 0 | 0
Evercore Plan [Member] | Subsequent Event [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 100.00% |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay (as a percent) | 3.00% |  |  |
Defined Contribution Plan, Employer Matching Contribution, Maximum Annual Contributions Per Employee, Amount | $ 3,000 |  |  |
Evercore Europe Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount |  | $ 2,972,000 | $ 2,915,000 | $ 3,145,000
Defined Contribution Plan, Maximum Annual Contributions Per Employee, (as a percent) |  | 10.00% |  |
Evercore Europe Plan [Member] | Minimum [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay (as a percent) |  | 5.00% |  |
Defined Contribution Plans Annual Contribution Percentage of Employee's Salary (as a percent) |  | 15.00% |  |
Defined Contribution Plan Contribution Percentage By Employee (as a percent) |  | 7.50% |  |
Evercore Europe Plan [Member] | Maximum [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay (as a percent) |  | 10.00% |  |
Defined Contribution Plans Annual Contribution Percentage of Employee's Salary (as a percent) |  | 50.00% |  |
Defined Contribution Plan Contribution Percentage By Employee (as a percent) |  | 10.00% |  |
Evercore Europe Plan After July 2011 [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Defined Contribution Plans Annual Contribution Percentage of Employee's Salary (as a percent) |  | 15.00% |  |
ISI U.K. Plan Through March 2018 [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Pension Contributions, Percent of Employees Salary (as a percent) |  | 5.00% |  |
ISI U.K. Plan Starting in April 2018 [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Pension Contributions, Percent of Employees Salary (as a percent) |  | 6.00% |  |

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- Definition Define contribution plan contribution percentage by employee + References No definition available. + Details
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Data Type: | num:percentItemType
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- Definition Maximum amount the employer will contribute to a defined contribution plan + References No definition available. + Details
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- Definition Define contribution plans annual contribution percentage of employee's salary + References No definition available. + Details
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- Definition Pension Contributions, Percent of Employees Salary (as a percent) + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Definition Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585 + Details
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