Net Income Per Share Attributable to Evercore Inc. Common Shareholders - Additional Information (Details) shares in Thousands, $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2016	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) shares	Nov. 30, 2015 shares
Class G And H Interests and Class I-P and K-P Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares that are Contingently Issuable		1,624	2,908	1,747
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)		5,920	6,397	6,606
Adjustment to Diluted Net Income Attributable to Class A Common Shareholders if LP Units were Dilutive | $		$ 28,186	$ 18,196	$ 7,697
Class A [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares that are Contingently Issuable		1,624	2,908	1,747
Share Repurchase During Offering					2,355
Class A [Member] | Warrant [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Warrants to Purchase Class A Shares (in shares)					5,455
LP Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited Partnership Units Convertible Conversion Ratio	1	1