Evercore Inc. (Parent Company Only) Financial Statements - Condensed Statements of Financial Condition (Parent Company Only) - Additional Information (Details) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Condensed Balance Sheet Statements, Captions [Line Items]
Treasury Stock at Cost, Shares	23,017,750	19,101,711
Parent Company [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Treasury Stock at Cost, Shares	23,017,750	19,101,711
Class A [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Common Stock, Shares Issued	62,119,904	58,292,567
Common Stock, Shares Outstanding	39,102,154	39,190,856
Class A [Member] | Parent Company [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Common Stock, Shares Issued	62,119,904	58,292,567
Common Stock, Shares Outstanding	39,102,154	39,190,856
Class B [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000,000	1,000,000
Common Stock, Shares Issued	82	24
Common Stock, Shares Outstanding	82	24
Class B [Member] | Parent Company [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000,000	1,000,000
Common Stock, Shares Issued	82	24
Common Stock, Shares Outstanding	82	24