Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Thousands		Total	Class A [Member]	Common Stock [Member] Class A [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of Accounting Change(1)	[1]					$ 2,229	$ (2,229)
Beginning Balance at Dec. 31, 2017		$ 796,368		$ 621	$ 1,600,699	(31,411)	79,461	$ (1,105,406)	$ 252,404
Beginning Balance, Shares at Dec. 31, 2017				62,119,904				(23,017,750)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		250,695					213,935		36,760
Other Comprehensive Income (Loss)		150				142			8
Treasury Stock Purchases		(187,457)						$ (187,457)
Treasury Stock Purchases, Shares								(1,908,489)
Evercore LP Units Converted Into Class Common Stock, Value		15,701		$ 11	58,256				(42,566)
Evercore LP Units Converted into Class A Common Stock (in Units)				1,080,554
Equity-based Compensation Awards		146,158		$ 25	131,208				14,925
Equity-based Compensation Awards, Shares				2,509,035
Dividends		(66,540)					(66,540)
Noncontrolling Interest (Note 14)		(55,678)			(25,458)				(30,220)
Ending Balance at Sep. 30, 2018		899,397		$ 657	1,764,705	(29,040)	224,627	$ (1,292,863)	231,311
Ending Balance, Shares at Sep. 30, 2018				65,709,493				(24,926,239)
Beginning Balance at Jun. 30, 2018		851,000		$ 656	1,721,668	(31,486)	198,815	$ (1,265,927)	227,274
Beginning Balance, Shares at Jun. 30, 2018				65,623,354				(24,678,992)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		59,299					49,461		9,838
Other Comprehensive Income (Loss)		2,873				2,446			427
Treasury Stock Purchases		(26,936)						$ (26,936)
Treasury Stock Purchases, Shares								(247,247)
Evercore LP Units Converted Into Class Common Stock, Value		287		$ 0	1,288				(1,001)
Evercore LP Units Converted into Class A Common Stock (in Units)				25,847
Equity-based Compensation Awards		46,678		$ 1	41,749				4,928
Equity-based Compensation Awards, Shares				60,292
Dividends		(23,649)					(23,649)
Noncontrolling Interest (Note 14)		(10,155)							(10,155)
Ending Balance at Sep. 30, 2018		899,397		$ 657	1,764,705	(29,040)	224,627	$ (1,292,863)	231,311
Ending Balance, Shares at Sep. 30, 2018				65,709,493				(24,926,239)
Beginning Balance at Dec. 31, 2018		1,007,939		$ 659	1,818,100	(30,434)	364,882	$ (1,395,087)	249,819
Beginning Balance, Shares at Dec. 31, 2018			39,748,576	65,872,014				(26,123,438)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		227,961					192,252		35,709
Other Comprehensive Income (Loss)		(5,121)				(4,355)			(766)
Treasury Stock Purchases		$ (253,864)						$ (253,864)
Treasury Stock Purchases, Shares		(3,014,000)						(3,014,400)
Evercore LP Units Converted Into Class Common Stock, Value		$ 18,644		$ 3	30,828				(12,187)
Evercore LP Units Converted into Class A Common Stock (in Units)				281,685
Equity-based Compensation Awards		179,866		$ 24	160,733				19,109
Equity-based Compensation Awards, Shares				2,420,162
Dividends		(77,576)					(77,576)
Noncontrolling Interest (Note 14)		(94,561)			(41,482)				(53,079)
Ending Balance at Sep. 30, 2019		1,003,288		$ 686	1,968,179	(34,789)	479,558	$ (1,648,951)	238,605
Ending Balance, Shares at Sep. 30, 2019			39,436,023	68,573,861				(29,137,838)
Beginning Balance at Jun. 30, 2019		974,835		$ 685	1,916,503	(31,988)	463,002	$ (1,609,916)	236,549
Beginning Balance, Shares at Jun. 30, 2019				68,508,501				(28,643,895)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		52,504					43,278		9,226
Other Comprehensive Income (Loss)		(3,303)				(2,801)			(502)
Treasury Stock Purchases		$ (39,035)						$ (39,035)
Treasury Stock Purchases, Shares		(494,000)						(493,943)
Evercore LP Units Converted Into Class Common Stock, Value		$ 492		$ 1	1,501				(1,010)
Evercore LP Units Converted into Class A Common Stock (in Units)				24,789
Equity-based Compensation Awards		57,168		$ 0	50,175				6,993
Equity-based Compensation Awards, Shares				40,571
Dividends		(26,722)					(26,722)
Noncontrolling Interest (Note 14)		(12,651)			0				(12,651)
Ending Balance at Sep. 30, 2019		$ 1,003,288		$ 686	$ 1,968,179	$ (34,789)	$ 479,558	$ (1,648,951)	$ 238,605
Ending Balance, Shares at Sep. 30, 2019			39,436,023	68,573,861				(29,137,838)

[1] The cumulative adjustment relates to the adoption of ASU No. 2016-01, "Recognition and Measurement of Financial Assets and Financial Liabilities" on January 1, 2018, for which the Company recorded an adjustment to Retained Earnings to reflect cumulative unrealized losses, net of tax, on available-for-sale equity securities previously recorded in Accumulated Other Comprehensive Income (Loss).