Evercore Inc. Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
	Feb. 02, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Temporary Equity [Line Items]
Dividends Declared Per Share of Class A Common Stock (in dollars per share)		$ 0.61	$ 0.58	$ 0.58	$ 0.58	$ 0.58	$ 0.58	$ 0.58	$ 0.50	$ 2.35	$ 2.24
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)										$ 2.35	$ 2.24
Declared and Paid Dividends, Cash										$ 95,226	$ 89,407
Treasury Stock, Shares, Acquired (in shares)										1,922	3,399
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)										$ 76.25	$ 83.28
Increase in Treasury Stock										$ 146,559	$ 283,081
LP Units Exchanged By Employees (in units)										899	353
Increase in Common Stock										$ 9	$ 3
Adjustments to Additional Paid-In-Capital										37,674	15,138
Accumulated Unrealized Gain (Loss) on Securities and Investments		$ (5,287)								(5,287)
Foreign Currency Translation Adjustment Gain (Loss), Net		(4,471)								(4,471)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax										20,337
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		1,489,374				$ 1,126,250				1,489,374	1,126,250	$ 1,007,939		$ 796,368
Accumulated Other Comprehensive Income (Loss) [Member]
Temporary Equity [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ (9,758)				$ (27,596)				$ (9,758)	$ (27,596)	$ (30,434)		$ (31,411)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Temporary Equity [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest													$ 2,229
Share Repurchase Program [Member]
Temporary Equity [Line Items]
Treasury Stock, Shares, Acquired (in shares)										854	2,360
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)										$ 75.93	$ 80.69
Share Repurchase Program [Member] | Minimum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)										58.28	73.18
Share Repurchase Program [Member] | Maximum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)										$ 81.96	$ 92.33
Net Settlement of Share Based Awards [Member]
Temporary Equity [Line Items]
Treasury Stock, Shares, Acquired (in shares)										1,068	1,039
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)										$ 76.51	$ 89.15
Net Settlement of Share Based Awards [Member] | Minimum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)										38.23	71.11
Net Settlement of Share Based Awards [Member] | Maximum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)										$ 104.38	$ 96.22
Dividends Accrued [Member]
Temporary Equity [Line Items]
Accrued Deferred Cash Dividends										$ 13,734	$ 14,642
Dividend Paid [Member]
Temporary Equity [Line Items]
Accrued Deferred Cash Dividends										$ 11,356	$ 7,396
Subsequent Event [Member]
Temporary Equity [Line Items]
Dividends Declared Per Share of Class A Common Stock (in dollars per share)	$ 0.61