Share-Based and Other Deferred Compensation (Details) $ / shares in Units, $ in Thousands		1 Months Ended				3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 15, 2019 shares	Jun. 30, 2019 USD ($) shares	Nov. 30, 2017 USD ($) shares	Jul. 31, 2017 vote shares	Nov. 30, 2016 USD ($) tranche Number_Of_Anniversaries shares	Jun. 30, 2019 USD ($) shares	Jun. 30, 2018 USD ($) shares	Jun. 30, 2019 USD ($) payment_installment Installments $ / shares shares	Jun. 30, 2018 USD ($) shares	Dec. 31, 2016 shares	Mar. 31, 2019 USD ($)	Dec. 31, 2017 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense						$ 25,375	$ 15,750	$ 52,768	$ 28,341
Severance Costs						1,538	3,066	4,813	6,484
Cash Payments Related to Separation Benefits						$ 1,533	$ 2,997	$ 3,257	$ 5,873
LP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Limited Partnership Units Convertible Conversion Ratio					1			1
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		2,872,000				2,872,000	5,399,000	2,872,000	5,399,000
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense						$ 8,216	$ 6,948	$ 16,626	$ 14,075
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] | Other Noncurrent Liabilities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Recorded Liability		$ 82,021				82,021		82,021
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
Class I-P Units [Member] | Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense						1,152	1,152	2,291	2,291
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						338	299	$ 634	595
Limited Partnership Units Convertible Conversion Ratio								1
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			16,000
Grant of K-P Units, Fair Value of Award		$ 5,771	$ 5,000
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								2,526,000
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares								$ 91.34
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								72.11
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								$ 96.22
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						56,526	46,375	$ 112,144	89,106
Shares Vested During Period (in shares) | shares								2,346,000
Shares Forfeited During Period (in shares) | shares								49,000
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											$ 93,366
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 | Number_Of_Anniversaries					4
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 | 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		77,933				77,933		$ 77,933
Employee Loans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement Compensation Expense						5,741	4,787	9,346	8,109
Deferred Compensation Arrangement with Individual, Recorded Liability		$ 32,582				32,582		$ 32,582
Requisite Service Period (in years)								1 year
Maximum Contractual Term (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]
Compensation Expense						$ 3,700	$ 3,700	$ 7,749	$ 7,572
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
Share-based Compensation Award, Tranche One [Member] | Class K-P Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of K-P Units (in units) | shares		120,000
Share-based Compensation Award, Tranche Two [Member] | Class K-P Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of K-P Units (in units) | shares		100,000