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 (Deficit) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2016		$ 783,331		$ 582	$ 1,368,122	$ (50,096)	$ 20,343	$ (811,653)	$ 256,033
Beginning Balance, Shares at Dec. 31, 2016				58,292,567				(19,101,711)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		120,524					98,955		21,569
Other Comprehensive Income (Loss)		1,538				1,234			304
Treasury Stock Purchases		(231,065)						$ (231,065)
Treasury Stock Purchases, Shares								(3,092,175)
Evercore LP Units Purchased or Converted into Class A Common Stock		(1,808)		$ 7	24,545				(26,360)
Evercore LP Units Purchased or Converted into Class A Common Stock, Shares				654,832
Equity-based Compensation Awards		75,935		$ 25	79,029				(3,119)
Equity-based Compensation Awards, Shares				2,489,349
Dividends		(34,223)					(34,223)
Noncontrolling Interest (Note 13)		(15,128)			(7,054)				(8,074)
Ending Balance at Jun. 30, 2017		699,104		$ 614	1,464,642	(48,862)	85,075	$ (1,042,718)	240,353
Ending Balance, Shares at Jun. 30, 2017				61,436,748				(22,193,886)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of Accounting Change(1)	[1]	0				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			39,102,154	62,119,904				(23,017,750)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		191,396					164,474		26,922
Other Comprehensive Income (Loss)		(2,723)				(2,304)			(419)
Treasury Stock Purchases		$ (160,521)						$ (160,521)
Treasury Stock Purchases, Shares		(1,661,000)						(1,661,242)
Evercore LP Units Purchased or Converted into Class A Common Stock		$ 15,414		$ 11	56,968				(41,565)
Evercore LP Units Purchased or Converted into Class A Common Stock, Shares				1,054,707
Equity-based Compensation Awards		99,480		$ 24	89,459				9,997
Equity-based Compensation Awards, Shares				2,448,743
Dividends		(42,891)					(42,891)
Noncontrolling Interest (Note 13)		(45,523)			(25,458)				(20,065)
Ending Balance at Jun. 30, 2018		$ 851,000		$ 656	$ 1,721,668	$ (31,486)	$ 198,815	$ (1,265,927)	$ 227,274
Ending Balance, Shares at Jun. 30, 2018			40,944,362	65,623,354				(24,678,992)

[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). See Note 3 for further information.