Net Income Per Share Attributable to Evercore Inc. Common Shareholders - Additional Information (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 30, 2016	Sep. 30, 2020 USD ($) shares	Sep. 30, 2019 USD ($) shares	Sep. 30, 2020 USD ($) shares	Sep. 30, 2019 USD ($) shares
Class J LP Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Issued LP Units (in shares)		0		0
Limited Partners' Capital Account, Units Outstanding		0		0
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 (in shares)		400,000	400,000	400,000	400,000
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)		5,070,000	5,310,000	5,161,000	5,238,000
Adjustment to Diluted Net Income Attributable to Class A Common Shareholders if LP Units were Dilutive | $		$ 6,560	$ 6,804	$ 18,990	$ 25,996
LP Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited Partnership Units Convertible Conversion Ratio	1	1		1