Share-Based and Other Deferred Compensation (Details) $ / shares in Units, $ in Thousands				1 Months Ended				3 Months Ended		12 Months Ended
	Mar. 01, 2020 USD ($)	Feb. 15, 2020 shares	Mar. 01, 2019 USD ($)	Jun. 30, 2019 shares	Nov. 30, 2017 shares	Jul. 31, 2017 vote shares	Nov. 30, 2016 USD ($) Number_Of_Anniversaries tranche shares	Mar. 31, 2021 USD ($) shares	Jun. 30, 2013 shares	Dec. 31, 2020 USD ($) Installments payment_installment $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2016 shares	Dec. 31, 2017 USD ($)	Dec. 31, 2006 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense, Tax Benefit										$ 46,572	$ 49,251	$ 39,958
Headcount Reductions (as a percent)										8.00%
Severance Costs										$ 30,340	7,756
Cash Payments Related To Separation Benefits											6,035	8,565
Payments for Restructuring										$ 26,492	6,412
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Severance Costs											$ 1,967	3,230
Restricted Stock Units Related to Restructuring | shares										156,000	22,000
Cash and Deferred Cash Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Severance Costs											$ 6,178	6,190
Special Charges [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Severance Costs												2,024
Payments for Restructuring										$ 26,492	377
Special Charges [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Severance Costs										10,916	1,272
Special Charges [Member] | Cash and Deferred Cash Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Severance Costs										$ 30,340	1,578
Employee Compensation and Benefits
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Severance Costs											8,145	9,420
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Period										1 year
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Period										5 years
LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Limited Partnership Units Convertible Conversion Ratio							1			1
Two Thousand Six 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 Shares Authorized | shares															20,000,000
Number of Additional Shares Authorized (in shares) | shares									5,000,000
2016 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													10,000,000
Amended Two Thousand Sixteen Stock Incentive Plan [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted								$ 232,000
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										7,047,000
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										2,715,000
Shares Issued During Period (in shares) | shares										1,946,000
Granted										$ 157,508
Shares Forfeited During Period (in shares) | shares										121,000
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense										$ 21,808	31,931	42,745
Long Term Incentive Plan Performance Period (in years)										4 years
Number of Payment Installments | payment_installment										3
Deferred Compensation Arrangement with Individual, Distribution Paid											19,516	4,532
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										$ 48,631
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										$ 70,560
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										$ 4,632	4,619	4,619
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										$ 8,920	$ 3,690	$ 1,200
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
LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount										$ 21,112
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition										26 months
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] | Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number | shares										199,000
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										1,946,000	2,598,000	1,968,000
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares										$ 80.94	$ 91.04	$ 95.01
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested										$ 157,508	$ 236,529	$ 186,964
Restricted Stock Units (RSUs) [Member] | 2016 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										$ 44.21	$ 72.11	$ 81.84
Restricted Stock Units (RSUs) [Member] | 2016 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										$ 93.19	$ 96.22	$ 114.80
Restricted Stock Units (RSUs) [Member] | Amended Two Thousand Sixteen Stock Incentive Plan [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued During Period (in shares) | shares								2,000,000
Award Vesting Period								4 years
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										$ 192,070	$ 208,786	$ 171,354
Shares Vested During Period (in shares) | shares										2,715,000	2,473,000	2,523,000
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount										$ 226,584
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition										21 months
Shares Forfeited During Period (in shares) | shares										121,000	121,000	70,000
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										$ 181,165	$ 93,366	$ 82,592		$ 3,750
Deferred Compensation Arrangement Compensation Expense										112,216	66,374	36,443
Deferred Compensation Arrangement with Individual, Recorded Liability										315,862
Deferred Compensation Arrangement with Individual, Compensation Cost Not Yet Recognized										$ 182,542
Deferred Compensation Arrangement With Individual, Total Compensation Cost Not Yet Recognized Period For Recognition										28 months
Deferred Cash Compensation Program [Member] | Subsequent Event [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								$ 99,000
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
Deferred Compensation Arrangement With Individual Cash Award Tranche Three Vesting Amount							$ 6,000
Awards Vesting Period | Number_Of_Anniversaries							3
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										$ 12,897	26,827	21,987
Deferred Compensation Arrangement with Individual, Compensation Cost Not Yet Recognized										$ 16,555
Deferred Compensation Arrangement With Individual, Total Compensation Cost Not Yet Recognized Period For Recognition										19 months
Deferred Compensation Arrangement with Individual, Number of Installments | Installments										5
Long Term Incentive Plan [Member] | 2017 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										$ 25,692
Employee Loans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense										20,411	20,421	17,971
Deferred Compensation Arrangement with Individual, Recorded Liability										$ 33,033
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
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]
Shares Vested During Period (in shares) | shares										223,000
Shares Issued During Period (in shares) | shares										0
Granted										$ 0
Shares Forfeited During Period (in shares) | shares										0
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	$ 18,101	$ 15,054
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