Share-Based and Other Deferred Compensation (Details) $ / shares in Units, $ in Thousands					1 Months Ended					3 Months Ended		12 Months Ended
	Mar. 01, 2021 USD ($)	Mar. 01, 2020 USD ($)	Feb. 15, 2020 shares	Mar. 01, 2019 USD ($)	Apr. 30, 2021 Installments	Jun. 30, 2019 shares	Nov. 30, 2017 shares	Jul. 31, 2017 vote shares	Nov. 30, 2016 USD ($) tranche Number_Of_Anniversaries shares	Mar. 31, 2021 USD ($) Installments $ / shares shares	Mar. 31, 2020 USD ($) shares	Dec. 31, 2020 shares	Dec. 31, 2017 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issued LP Units (in shares) | shares										0
Headcount Reductions (as a percent)												8.00%
Severance Costs										$ 287	$ 16,431
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Units Related to Restructuring | shares										3,000	91,000
Special Charges [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Severance Costs											$ 5,529
Special Charges [Member] | Cash and Deferred Cash Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Severance Costs											16,431
Employee Compensation and Benefits | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Severance Costs										$ 284
LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Limited Partnership Units Convertible Conversion Ratio									1	1
Amended Two Thousand Sixteen Stock Incentive Plan [Member] | Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Additional Shares Authorized (in shares) | shares												6,000,000
Number of Shares Available for Grant (in shares) | shares										5,093,000
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense										$ 4,893	(6,810)
Deferred Compensation Arrangement with Individual, Distribution Paid										48,461
Long Term Incentive Plan [Member] | Current Liabilities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Recorded Liability										48,451
Long Term Incentive Plan [Member] | Noncurrent Liabilities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Recorded Liability										$ 27,200
Class J LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Limited Partners' Capital Account, Units Outstanding | shares										0
Class J LP Units [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Vested During Period (in shares) | shares			223,000
Limited Partners' Capital Account, Units Outstanding | shares										0
Issued LP Units (in shares) | shares										0
Class I-P Units [Member] | Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense										$ 1,236	1,152
Grant of I-P Units (in units) | shares									400,000
Retirement Notice Requirement									1 year
Number of Tranches of Class I-P Units | tranche									2
Number of Class I-P Units in Each Tranche (in units) | 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
Class K-P Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense										$ 1,860	1,093
Grant of K-P Units (in units) | shares						220,000	64,000
K-P Units to be Granted Upon Achievement of Benchmarks (in units) | shares										460,000
Grant of K-P Units, Fair Value of Award										$ 34,684
Class K Units Probable of Achievement (in units) | shares										403,000
Class K-P Units [Member] | Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of K-P Units (in units) | shares						120,000
Class K-P Units [Member] | Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of K-P Units (in units) | shares						100,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Period										4 years
Restricted Stock Units (RSUs) [Member] | Amended Two Thousand Sixteen Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued During Period (in shares) | shares										1,983,000
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares										$ 118.26
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested										$ 234,501
Restricted Stock Units (RSUs) [Member] | Amended Two Thousand Sixteen Stock Incentive Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares										$ 111.03
Restricted Stock Units (RSUs) [Member] | Amended Two Thousand Sixteen Stock Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares										$ 124.61
Restricted Stock Units (RSUs) [Member] | 2006 and 2016 Stock Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense										$ 51,708	50,297
Shares Vested During Period (in shares) | shares										2,074,000
Shares Forfeited During Period (in shares) | shares										30,000
Deferred Cash Compensation Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation, Vesting Period (in years)										4 years
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount										$ 96,511
Deferred Compensation Arrangement Compensation Expense										30,889	22,235
Deferred Compensation Arrangement with Individual, Recorded Liability										319,763
Deferred Compensation Arrangement with Individual, Compensation Cost Not Yet Recognized										$ 254,151
Deferred Compensation Arrangement With Individual, Total Compensation Cost Not Yet Recognized Period For Recognition										30 months
Restricted Cash Award [Member] | Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Retirement Notice Requirement									6 months
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount									$ 35,000
Deferred Compensation Arrangement With Individual Cash Award Tranche One Vesting Amount				$ 11,000
Deferred Compensation Arrangement With Individual Cash Award Tranche Two Vesting Amount	$ 6,000	$ 6,000
Deferred Compensation Arrangement With Individual Cash Award Tranche Three Vesting Amount									$ 6,000
Awards Vesting Period | Number_Of_Anniversaries									2
Restricted Cash Award [Member] | Board of Directors Chairman [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount									$ 8,750
Restricted Cash Award [Member] | Board of Directors Chairman [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount									$ 35,000
Other Deferred Cash [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount													$ 29,500
Deferred Compensation Arrangement Compensation Expense										$ 3,341	3,345
Deferred Compensation Arrangement with Individual, Number of Installments | Installments										5
Employee Loans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense										$ 4,149	4,434
Deferred Compensation Arrangement with Individual, Recorded Liability										$ 30,645
Employee Loans [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite Service Period (in years)										1 year
Employee Loans [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite Service Period (in years)										5 years
2017 Long-term Incentive Plan [Member] | Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Cost Not Yet Recognized										$ 20,804
Long Term Incentive Plan Performance Period (in years)										4 years
2021 Long Term Incentive Plan | Long Term Incentive Plan [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan Performance Period (in years)					4 years
Number of Payment Installments | Installments					3
Evercore ISI [Member] | Class H LP Interests [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Units Outstanding (in units) | shares								4,148,000
Evercore ISI [Member] | Class J LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Number of Votes | vote								1
Evercore ISI [Member] | Class J LP Units [Member] | Class B [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, New Issues | shares								1
Evercore ISI [Member] | Class J LP Units [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense											$ 1,067
Evercore ISI [Member] | Vested LP Units [Member] | Class J LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of LP Units (in units) | shares								1,012,000
Evercore ISI [Member] | Vested LP Units [Member] | Class J LP Units [Member] | Subject to Continued Employment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of LP Units (in units) | shares								963,000
Evercore ISI [Member] | Unvested LP Units [Member] | Class J LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of LP Units (in units) | shares								938,000