Evercore Inc. Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands			3 Months Ended		6 Months Ended
		Jul. 23, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
Temporary Equity [Line Items]
Dividends Declared Per Share of Class A Common Stock (in dollars per share)			$ 0.5	$ 0.34	$ 0.9	$ 0.68
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)					$ 0.90
Declared and Paid Dividends, Cash					$ 37,022
Accrued Deferred Cash Dividends					$ 5,869
Treasury Stock, Shares, Acquired (in shares)					1,661
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)					$ 96.63
Increase in Treasury Stock					$ 160,521
LP Units Exchanged By Employees (in units)					1,055
Increase in Common Stock					$ 11
Adjustments to Additional Paid-In-Capital					41,554
Accumulated Unrealized Gain (Loss) on Marketable Securities			$ (3,651)		(3,651)
Foreign Currency Translation Adjustment Gain (Loss), Net			$ (27,835)		$ (27,835)
Cumulative Effect of Accounting Change	[1]							$ 0
Accounting Standards Update 2016-01 [Member]
Temporary Equity [Line Items]
Cumulative Effect of Accounting Change							$ (2,229)
Share Repurchase Program [Member]
Temporary Equity [Line Items]
Treasury Stock, Shares, Acquired (in shares)					625
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)					$ 91.61
Share Repurchase Program [Member] | Minimum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)					85.91
Share Repurchase Program [Member] | Maximum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)					$ 95.98
Net Settlement of Share Based Awards [Member]
Temporary Equity [Line Items]
Treasury Stock, Shares, Acquired (in shares)					1,036
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)					$ 99.66
Net Settlement of Share Based Awards [Member] | Minimum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)					89.98
Net Settlement of Share Based Awards [Member] | Maximum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)					$ 107.68
Subsequent Event [Member]
Temporary Equity [Line Items]
Dividends Declared Per Share of Class A Common Stock (in dollars per share)		$ 0.50

[1] The cumulative adjustment relates to the adoption of ASU No. 2016-01, "Recognition and Measurement of Financial Assets and Financial Liabilities" on January 1, 2018, for which the Company recorded an adjustment to Retained Earnings to reflect cumulative unrealized losses, net of tax, on available-for-sale equity securities previously recorded in Accumulated Other Comprehensive Income (Loss). See Note 3 for further information.