Net Income Per Share Attributable to Evercore Inc. Common Shareholders - Additional Information (Details) shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 30, 2016	Sep. 30, 2017 USD ($) shares	Sep. 30, 2016 USD ($) shares	Sep. 30, 2017 USD ($) shares	Sep. 30, 2016 USD ($) shares
Class G And H Interests and Class I-P Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares that are Contingently Issuable		981	2,714	2,032	2,971
LP Units [Member] | Class A and E LP Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)		5,930	6,410	6,010	6,440
Adjustment to Diluted Net Income Attributable to Class A Common Shareholders if LP Units were Dilutive | $		$ 6,628	$ 5,972	$ 20,746	$ 11,235
LP Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited Partnership Units Convertible Conversion Ratio	1			1