Evercore Inc. (Parent Company Only) Financial Statements - Additional Information (Details)		1 Months Ended	3 Months Ended								12 Months Ended
	Aug. 01, 2019 USD ($)	Nov. 30, 2016	Dec. 31, 2020 USD ($) $ / shares shares	Sep. 30, 2020 $ / shares	Jun. 30, 2020 $ / shares	Mar. 31, 2020 $ / shares	Dec. 31, 2019 $ / shares shares	Sep. 30, 2019 $ / shares	Jun. 30, 2019 $ / shares	Mar. 31, 2019 $ / shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Aug. 01, 2019 GBP (£)	Mar. 30, 2016 USD ($)
Condensed Financial Statements, Captions [Line Items]
Treasury Stock, Shares, Acquired (in shares) | shares											1,922,000	3,399,000
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares											$ 76.25	$ 83.28
Increase in Treasury Stock											$ 146,559,000	$ 283,081,000
Dividends Declared Per Share of Class A Common Stock (in dollars per share) | $ / shares			$ 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) | $ / shares											$ 2.35	$ 2.24
Declared and Paid Dividends, Cash											$ 95,226,000	$ 89,407,000
Contractual Obligations Related To Tax Receivable Agreements			$ 86,751,000								86,751,000
Payment To Counterparties To Tax Receivable Agreement Within One Year Or Less			9,891,000								9,891,000
Payment To Counterparties To Tax Receivable Agreement One To Three Years			20,586,000								20,586,000
Payment To Counterparties To Tax Receivable Agreement Three To Five Years			19,572,000								19,572,000
Payment To Counterparties To Tax Receivable Agreement After Five Years			36,702,000								36,702,000
Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long Term Debt Maturities Repayments Of Principal And Interest			505,236,000								505,236,000
Long Term Debt Maturities Repayments Of Principal And Interest In Next Twelve Months			54,883,000								54,883,000
Long Term Debt Maturities Repayments Of Principal And Interest In One To Three Years			97,160,000								97,160,000
Long Term Debt Maturities Repayments Of Principal And Interest In Three To Five Years			24,904,000								24,904,000
Long Term Debt Maturities Repayments Of Principal And Interest After Year Five			$ 328,289,000								$ 328,289,000
Share Repurchase Program [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock, Shares, Acquired (in shares) | shares											854,000	2,360,000
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares											$ 75.93	$ 80.69
Minimum [Member] | Share Repurchase Program [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share) | $ / shares											58.28	73.18
Maximum [Member] | Share Repurchase Program [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share) | $ / shares											$ 81.96	$ 92.33
Net Settlement of Share Based Awards [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock, Shares, Acquired (in shares) | shares											1,068,000	1,039,000
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares											$ 76.51	$ 89.15
Net Settlement of Share Based Awards [Member] | Minimum [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share) | $ / shares											38.23	71.11
Net Settlement of Share Based Awards [Member] | Maximum [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share) | $ / shares											$ 104.38	$ 96.22
Class A [Member]
Condensed Financial Statements, Captions [Line Items]
Common Stock, Shares Authorized | shares			1,000,000,000				1,000,000,000				1,000,000,000	1,000,000,000
Common Stock, Par Value (in dollars per share) | $ / shares			$ 0.01				$ 0.01				$ 0.01	$ 0.01
Common Stock, Shares, Issued | shares			72,195,283				68,698,675				72,195,283	68,698,675
Class B [Member]
Condensed Financial Statements, Captions [Line Items]
Common Stock, Shares Authorized | shares			1,000,000				1,000,000				1,000,000	1,000,000
Common Stock, Par Value (in dollars per share) | $ / shares			$ 0.01				$ 0.01				$ 0.01	$ 0.01
Common Stock, Shares, Issued | shares			48				84				48	84
LP Units [Member]
Condensed Financial Statements, Captions [Line Items]
Limited Partnership Units Convertible Conversion Ratio		1									1
Parent Company [Member] | Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross														$ 170,000,000
Long-term Debt, Weighted Average Life	12 years
Long-term Debt, Weighted Average Interest Rate, at Point in Time (as a percent)	4.26%												4.26%
Parent Company [Member] | Series A Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross														$ 38,000,000
Debt Instrument, Interest Rate, Stated Percentage														4.88%
Parent Company [Member] | Series B Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross														$ 67,000,000
Debt Instrument, Interest Rate, Stated Percentage														5.23%
Parent Company [Member] | Series C Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross														$ 48,000,000
Debt Instrument, Interest Rate, Stated Percentage														5.48%
Parent Company [Member] | Series D Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross														$ 17,000,000
Debt Instrument, Interest Rate, Stated Percentage														5.58%
Parent Company [Member] | Series E Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross	$ 75,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.34%												4.34%
Parent Company [Member] | Series F Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross	$ 60,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.44%												4.44%
Parent Company [Member] | Series G Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross	$ 40,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.54%												4.54%
Parent Company [Member] | Series H Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross | £													£ 25,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.33%												3.33%
Parent Company [Member] | United States of America, Dollars | Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross	$ 175,000,000
Parent Company [Member] | United Kingdom, Pounds | Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross | £													£ 25,000,000
Parent Company [Member] | Class A [Member]
Condensed Financial Statements, Captions [Line Items]
Common Stock, Shares Authorized | shares			1,000,000,000								1,000,000,000
Common Stock, Par Value (in dollars per share) | $ / shares			$ 0.01								$ 0.01
Common Stock, Shares, Issued | shares			72,195,000								72,195,000
Parent Company [Member] | Class B [Member]
Condensed Financial Statements, Captions [Line Items]
Common Stock, Shares Authorized | shares			1,000,000								1,000,000
Common Stock, Par Value (in dollars per share) | $ / shares			$ 0.01								$ 0.01
Common Stock Shares Cancelled (in shares) | shares			2								2
Parent Company [Member] | LP Units [Member]
Condensed Financial Statements, Captions [Line Items]
Limited Partnership Units Convertible Conversion Ratio											1
Dividend Paid [Member]
Condensed Financial Statements, Captions [Line Items]
Accrued Deferred Cash Dividends											$ 11,356,000	$ 7,396,000
Dividends Accrued [Member]
Condensed Financial Statements, Captions [Line Items]
Accrued Deferred Cash Dividends											$ 13,734,000	$ 14,642,000