Share-Based and Other Deferred Compensation (Details) $ / shares in Units, $ in Thousands		1 Months Ended			3 Months Ended			12 Months Ended				23 Months Ended	24 Months Ended
	Feb. 15, 2019 shares	Nov. 30, 2017 USD ($) shares	Jul. 31, 2017 vote shares	Nov. 30, 2016 USD ($) tranche shares	Mar. 31, 2019 USD ($) shares	Mar. 31, 2017 USD ($) shares	Jun. 30, 2013 shares	Dec. 31, 2018 USD ($) payment_installment $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2014 shares	Feb. 15, 2020 shares	Dec. 31, 2019 USD ($)	Dec. 31, 2006 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense								$ 58,430	$ 24,677	$ 15,504
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense								39,958	53,402	44,209
Severance Costs								9,420	6,655	6,820
Cash Payments Related to Separation Benefits								8,565	2,914	$ 3,622
Special Charges [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Severance Costs								$ 2,024	$ 3,930
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
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								2,523,000
Shares Issued During Period (in shares) | shares								1,968,000
Shares Forfeited During Period (in shares) | shares								70,000
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
Number of Shares Available for Grant (in shares) | shares								5,349,000	7,247,000
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense								$ 42,745	$ 31,923	$ 35,258
Long Term Incentive Plan Performance Period (in years)								4 years
Number of Payment Installments | payment_installment								3
Long Term Incentive Plan [Member] | Second Installment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Distribution Paid								$ 4,532	34,157
Long Term Incentive Plan [Member] | Other Current Liabilities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Recorded Liability								19,489
Long Term Incentive Plan [Member] | Other Noncurrent Liabilities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Recorded Liability								$ 65,406
Class G LP 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 LP 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 H LP Interests [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class H Interests Performance Period (in years)								3 years
Class H LP 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
Class H LP 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
Class J LP Units [Member] | Acquisition Related [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Vested During Period (in shares) | shares	632,000
Class I-P Units [Member] | Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense (Reversal of Expense)								4,619	4,619	$ 544
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 (Reversal of Expense)								1,200	197
Limited Partnership Units Convertible Conversion Ratio		1
Grant of K-P Units (in units) | shares		64,000
K-P Units to be Granted Upon Achievement of Benchmarks (in units) | shares		16,000
Grant of K-P Units, Fair Value of Award		$ 5,000
LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options								$ 33,034
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition								19 months
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
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 (in shares) | shares								77,000
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 (Reversal of Expense)								$ 171,354	$ 156,353	$ 125,990
Shares Vested During Period (in shares) | shares								2,523,000	2,512,000	2,609,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options								$ 267,579
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition								25 months
Shares Issued During Period (in shares) | shares										3,144,000
Shares Forfeited During Period (in shares) | shares								70,000	154,000	181,000
Restricted Stock Units (RSUs) [Member] | 2006 and 2016 Stock Incentive Plans [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										$ 44.30
Restricted Stock Units (RSUs) [Member] | 2006 and 2016 Stock Incentive Plans [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										$ 70.65
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								1,968,000	2,813,000
Restricted Stock Units (RSUs) [Member] | 2016 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					2,400,000
Awards Vesting Period					4 years
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								$ 81.84	$ 69.10
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								$ 114.80	$ 85.68
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								$ 82,592	$ 3,750	$ 41,147
Deferred Compensation Arrangement with Individual, Compensation Cost Not Yet Recognized								$ 111,800
Deferred Compensation Arrangement With Individual, Total Compensation Cost Not Yet Recognized Period For Recognition								30 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					$ 93,000
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
Awards Vesting Period				4 years
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
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
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
Awards Vesting Period									5 years
Long Term Incentive Plan [Member] | 2013 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								$ 191
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								93,939
Employee Loans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense								17,971	$ 20,969	$ 19,625
Deferred Compensation Arrangement with Individual, Recorded Liability								$ 36,464
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)									11.70%	16.10%
Management Basis EBIT									$ 26,904	$ 39,634
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%
Management Basis EBIT													$ 34,357
Evercore ISI [Member] | Class E LP Units [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units Amended In Period (in units) | shares						19,000
Evercore ISI [Member] | Class E LP Units [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense (Reversal of Expense)									17,962	21,077
Evercore ISI [Member] | Class G LP Interests [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units Amended In Period (in units) | shares						14,000
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
Units Amended In Period (in units) | shares						162,000
Evercore ISI [Member] | Class H LP Interests [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 (in units) | shares												2,005,000
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								632,000
Shares Issued During Period (in shares) | shares								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 (Reversal of Expense)								$ 15,054	6,020
Evercore ISI [Member] | Class G And H Interests [Member] | Acquisition Related [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense (Reversal of Expense)						$ (26,224)			(12,897)	$ 59,357
Evercore ISI [Member] | Vested LP Units [Member] | Class E LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of LP Units (in units) | shares											710,000
Evercore ISI [Member] | Vested LP Units [Member] | Class G LP Interests [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of LP Units (in units) | shares											538,000
Evercore ISI [Member] | Vested LP Units [Member] | Class H LP Interests [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of LP Units (in units) | shares											2,044,000
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 E LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of LP Units (in units) | shares											710,000
Evercore ISI [Member] | Unvested LP Units [Member] | Class G LP Interests [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of LP Units (in units) | shares											540,000
Evercore ISI [Member] | Unvested LP Units [Member] | Class H LP Interests [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of LP Units (in units) | shares											2,051,000
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
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 (Reversal of Expense)									3,532
Amended Grant Date Weighted Average Fair Value, Granted									$ 14,891