Evercore Inc. Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands			3 Months Ended								12 Months Ended
		Jan. 28, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
Temporary Equity [Line Items]
Dividends Declared Per Share of Class A Common Stock (in dollars per share)			$ 0.58	$ 0.58	$ 0.58	$ 0.50	$ 0.50	$ 0.50	$ 0.50	$ 0.40	$ 2.24	$ 1.90
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)											$ 2.24	$ 1.90
Declared and Paid Dividends, Cash											$ 89,407	$ 77,302
Treasury Stock, Shares, Acquired (in shares)											3,399	3,106
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)											$ 83.28	$ 93.24
Increase in Treasury Stock											$ 283,081	$ 289,681
LP Units Exchanged By Employees (in units)											353	1,182
Increase in Common Stock											$ 3	$ 12
Adjustments to Additional Paid-In-Capital											15,138	$ 46,583
Accumulated Unrealized Gain (Loss) on Securities and Investments			$ (4,007)								(4,007)
Foreign Currency Translation Adjustment Gain (Loss), Net			$ (23,589)								$ (23,589)
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)											2,360	2,021
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)											$ 80.69	$ 89.81
Share Repurchase Program [Member] | Minimum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)											73.18	80.05
Share Repurchase Program [Member] | Maximum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)											$ 92.33	$ 112.30
Net Settlement of Share Based Awards [Member]
Temporary Equity [Line Items]
Treasury Stock, Shares, Acquired (in shares)											1,039	1,085
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)											$ 89.15	$ 99.64
Net Settlement of Share Based Awards [Member] | Minimum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)											71.11	79.47
Net Settlement of Share Based Awards [Member] | Maximum [Member]
Temporary Equity [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share)											$ 96.22	$ 115.30
Dividends Accrued [Member]
Temporary Equity [Line Items]
Accrued Deferred Cash Dividends											$ 14,642	$ 12,288
Dividend Paid [Member]
Temporary Equity [Line Items]
Accrued Deferred Cash Dividends											$ 7,396
Subsequent Event [Member]
Temporary Equity [Line Items]
Dividends Declared Per Share of Class A Common Stock (in dollars per share)		$ 0.58
G5 [Member]
Temporary Equity [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax													$ 16,266

[1] (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).