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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, 2018
USD ($)
shares
Sep. 30, 2017
USD ($)
shares
Sep. 30, 2018
USD ($)
shares
Sep. 30, 2017
USD ($)
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   400 981 400 2,032
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)   5,018 5,930 5,125 6,010
Adjustment to Diluted Net Income Attributable to Class A Common Shareholders if LP Units were Dilutive | $   $ 6,423 $ 6,628 $ 26,881 $ 20,746
LP Units [Member]          
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Limited Partnership Units Convertible Conversion Ratio 1     1