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		94,647					80,771		13,876
Other Comprehensive Income		222				178			44
Treasury Stock Purchases		(86,383)						$ (86,383)
Treasury Stock Purchases, Shares								(1,107,695)
Evercore LP Units Converted into Class A Common Stock		503		$ 7	23,622				(23,126)
Evercore LP Units Purchased or Converted into Class A Common Stock, Shares				628,930
Equity-based Compensation Awards		18,331		$ 25	39,678				(21,372)
Equity-based Compensation Awards, Shares				2,457,893
Dividends		(18,409)			0		(18,409)
Noncontrolling Interest (Note 13)		(7,761)			(7,054)				(707)
Ending Balance at Mar. 31, 2017		784,481		$ 614	1,424,368	(49,918)	82,705	$ (898,036)	224,748
Ending Balance, Shares at Mar. 31, 2017				61,379,390				(20,209,406)
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		109,736					95,543		14,193
Other Comprehensive Income		3,654				3,133			521
Treasury Stock Purchases		$ (139,236)						$ (139,236)
Treasury Stock Purchases, Shares		(1,422,000)						(1,421,649)
Evercore LP Units Converted into Class A Common Stock		$ 13,588		$ 9	47,915				(34,336)
Evercore LP Units Purchased or Converted into Class A Common Stock, Shares				860,115
Equity-based Compensation Awards		48,051		$ 24	42,905				5,122
Equity-based Compensation Awards, Shares				2,411,100
Dividends		(19,170)			0		(19,170)
Noncontrolling Interest (Note 13)		(38,658)			(25,227)				(13,431)
Ending Balance at Mar. 31, 2018		$ 774,333		$ 654	$ 1,666,292	$ (26,049)	$ 153,605	$ (1,244,642)	$ 224,473
Ending Balance, Shares at Mar. 31, 2018			40,951,720	65,391,119				(24,439,399)

[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.