Share-Based and Other Deferred Compensation (Details)	1 Months Ended			3 Months Ended		12 Months Ended				35 Months Ended
	Feb. 28, 2017 shares	Nov. 30, 2016 USD ($) $ / shares shares	Feb. 29, 2016 shares	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) shares	Dec. 31, 2014 shares	Feb. 15, 2020 USD ($) shares	Dec. 31, 2012 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expense Related to Separation Benefits				$ 609,000	$ 2,028,000
Cash Payments Related to Separation Benefits				$ 111,000	1,139,000
LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Limited Partnership Units Convertible Conversion Ratio				1
2016 Stock Incentive Plan [Member] | Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized | shares								10,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares				7,455,000
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense				$ 5,858,000	3,739,000
Long Term Incentive Plan Performance Period (in years)				4 years
Deferred Compensation Arrangement with Individual, Recorded Liability				$ 36,541,000
Number of Payment Installments				3
Deferred Compensation Arrangement with Individual, Distributions Paid				$ 19,401,000
Restricted Stock Units (RSUs) [Member] | Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued During Period (in shares) | shares		900,000
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares		$ 65.38
Compensation Expense Related to Service-based Award				$ 2,302,000
Retirement Notice Requirement				1 year
Restricted Stock Units (RSUs) [Member] | Board of Directors Chairman [Member] | December 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		18.00%
Restricted Stock Units (RSUs) [Member] | Board of Directors Chairman [Member] | March 2018 through 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		14.00%
Restricted Stock Units (RSUs) [Member] | Board of Directors Chairman [Member] | March 2022 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		26.00%
Restricted Stock Units (RSUs) [Member] | 2016 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued During Period (in shares) | shares				2,477,000
Restricted Stock Units (RSUs) [Member] | 2006 and 2016 Stock Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Vested During Period (in shares) | shares				2,297,000
Shares Forfeited During Period | shares				26,000
Compensation Expense Related to Service-based Award				$ 38,742,000	28,762,000
Restricted Stock Units (RSUs) [Member] | Minimum [Member] | 2016 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares				$ 78.48
Restricted Stock Units (RSUs) [Member] | Maximum [Member] | 2016 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares				$ 81.52
Restricted Cash Award [Member] | Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount		$ 35,000,000
Deferred Compensation Arrangement With Individual Cash Award Tranche One Vesting Amount		11,000,000
Deferred Compensation Arrangement With Individual Cash Award Tranche Two Vesting Amount		6,000,000
Awards Vesting Period				4 years
Retirement Notice Requirement				6 months
Deferred Compensation Arrangement Compensation Expense				$ 1,188,000
Restricted Cash Award [Member] | Minimum [Member] | Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount		8,750,000
Restricted Cash Award [Member] | Maximum [Member] | Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount		$ 35,000,000
Class I-P Units [Member] | Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Retirement Notice Requirement		1 year
Grant of I-P Units | shares		400,000
Number of Tranches of Class I-P Units		2
Number of Class I-P Units in Each Tranche | shares		200,000
Number of Consecutive Trading Days Required for Class I-P Units to Exceed Thresholds		20 days
Grant of I-P Units, Fair Value of Award		$ 24,412,000
Compensation Expense Related to Class I-P Units				1,139,000
Deferred Cash Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount				3,750,000				$ 41,147,000			$ 3,926,000
Deferred Compensation Arrangement Compensation Expense				$ 3,210,000	2,560,000
Deferred Compensation, Vesting Period (in years)				4 years
Employee Loans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense				$ 4,172,000	$ 4,832,000
Deferred Compensation Arrangement with Individual, Recorded Liability				$ 32,594,000
Requisite Service Period (in years)				1 year
Maximum Contractual Term (in years)				5 years
Evercore ISI [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Management Basis EBIT Margin (as a percent)					16.20%
Management Basis EBIT					$ 36,900,000
Evercore ISI [Member] | Scenario, Forecast [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Management Basis EBIT Margin (as a percent)						14.00%	11.70%
Management Basis EBIT						$ 34,357,000	$ 26,904,000
Evercore ISI [Member] | Modified LP Units and Interests [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense Related to Acquisition Related Awards				$ (3,022,000)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Grant Date Weighted Average Fair Value, Granted				$ 14,891,000
Class E LP Units [Member] | Evercore ISI [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share Based Payment Award Equity Instruments Other Than Options Modified in Period | shares				19,000
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				$ 4,756,000	5,613,000
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) | shares									710,000
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) | shares									710,000
Class G Interests [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Management Basis EBIT Margin (as a percent)				12.00%
Class G Interests [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Management Basis EBIT Margin (as a percent)				16.00%
Class G Interests [Member] | Evercore ISI [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Vested During Period (in shares) | shares	368,000		371,000
Share-based Compensation Arrangement by Share Based Payment Award Equity Instruments Other Than Options Modified in Period | shares				14,000
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) | shares									538,000
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) | shares									540,000
Class H Interests [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class H Interests Performance Period (in years)				3 years
Class H Interests [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Management Basis EBIT Margin (as a percent)				7.00%
Management Basis EBIT				$ 8,000,000
Class H Interests [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Management Basis EBIT Margin (as a percent)				17.00%
Management Basis EBIT				$ 48,000,000
Class H Interests [Member] | Evercore ISI [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share Based Payment Award Equity Instruments Other Than Options Modified in Period | shares				162,000
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) | shares									2,044,000
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) | shares									2,051,000
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				$ (26,224,000)	$ 26,051,000
Life to Date Accrued Compensation Expense Related to Acquisition Related Awards				56,251,000
Additional Compensation Expense Related to Acquisition Related Awards if Maximum Thresholds Were Probable				$ 76,086,000
Class G And H Interests [Member] | Evercore ISI [Member] | Acquisition Related [Member] | Scenario, Forecast [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Interests That Would Vest Related to Acquisition Related Awards Based on Current Performance | shares										2,030,000
Remaining Compensation Expense Related to Acquisition Related Awards if Maximum Thresholds Were Probable										$ 103,449,000
Interests That Would Vest Related to Acquisition Related Awards if Maximum Thresholds Were Probable | shares										4,572,000