Evercore Inc. (Parent Company Only) Financial Statements - Additional Information (Details)		1 Months Ended	3 Months Ended								12 Months Ended
	Mar. 30, 2016 USD ($)	Nov. 30, 2016	Dec. 31, 2018 USD ($) $ / shares shares	Sep. 30, 2018 $ / shares	Jun. 30, 2018 $ / shares	Mar. 31, 2018 $ / shares	Dec. 31, 2017 $ / shares shares	Sep. 30, 2017 $ / shares	Jun. 30, 2017 $ / shares	Mar. 31, 2017 $ / shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares
Condensed Financial Statements, Captions [Line Items]
Treasury Stock, Shares, Acquired (in shares) | shares											3,106,000	3,916,000
Increase in Treasury Stock											$ 289,681,000	$ 293,753,000
Dividends Declared Per Share of Class A Common Stock (in dollars per share) | $ / shares			$ 0.50	$ 0.50	$ 0.50	$ 0.40	$ 0.40	$ 0.34	$ 0.34	$ 0.34	$ 1.90	$ 1.42
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares											$ 1.90	$ 1.42
Declared and Paid Dividends, Cash											$ 77,302,000	$ 56,521,000
Accrued Deferred Cash Dividends											12,288,000	$ 9,815,000
Contractual Obligations Related To Tax Receivable Agreements			$ 103,572,000								103,572,000
Payment To Counterparties To Tax Receivable Agreement Within One Year Or Less			9,161,000								9,161,000
Payment To Counterparties To Tax Receivable Agreement One To Three Years			19,304,000								19,304,000
Payment To Counterparties To Tax Receivable Agreement Three To Five Years			20,002,000								20,002,000
Payment To Counterparties To Tax Receivable Agreement After Five Years			55,105,000								55,105,000
Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long Term Debt Maturities Repayments Of Principal And Interest			219,142,000								219,142,000
Long Term Debt Maturities Repayments Of Principal And Interest In Next Twelve Months			$ 8,937,000								$ 8,937,000
Share Repurchase Program [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock, Shares, Acquired (in shares) | shares											2,021,000	2,757,000
Share Repurchase Program [Member] | Minimum [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share) | $ / shares											$ 80.05	$ 67.37
Share Repurchase Program [Member] | Maximum [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share) | $ / shares											$ 112.30	$ 78.81
Net Settlement of Share Based Awards [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock, Shares, Acquired (in shares) | shares											1,085,000	1,159,000
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											$ 79.47	$ 50.90
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											$ 115.30	$ 90.50
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			65,872,014				62,119,904				65,872,014	62,119,904
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			86				82				86	82
LP Units [Member]
Condensed Financial Statements, Captions [Line Items]
Limited Partnership Units Convertible Conversion Ratio		1									1
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Dividends Declared Per Share of Class A Common Stock (in dollars per share) | $ / shares											$ 1.90
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares											$ 1.90
Declared and Paid Dividends, Cash											$ 77,302,000
Accrued Deferred Cash Dividends											12,288,000
Contractual Obligations Related To Tax Receivable Agreements			$ 103,572,000								103,572,000
Payment To Counterparties To Tax Receivable Agreement Within One Year Or Less			9,161,000								9,161,000
Payment To Counterparties To Tax Receivable Agreement One To Three Years			19,304,000								19,304,000
Payment To Counterparties To Tax Receivable Agreement Three To Five Years			20,002,000								20,002,000
Payment To Counterparties To Tax Receivable Agreement After Five Years			55,105,000								55,105,000
Parent Company [Member] | Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Gross	$ 170,000,000
Long Term Debt Maturities Repayments Of Principal And Interest			219,142,000								219,142,000
Long Term Debt Maturities Repayments Of Principal And Interest In Next Twelve Months			8,937,000								8,937,000
Long Term Debt Maturities Repayments Of Principal And Interest In One To Three Years			54,947,000								54,947,000
Long Term Debt Maturities Repayments Of Principal And Interest In Three To Five Years			79,414,000								79,414,000
Long Term Debt Maturities Repayments Of Principal And Interest After Five Years			$ 75,844,000								$ 75,844,000
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] | Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Extinguishment of Debt, Amount	$ 120,000,000
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				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			65,872,014				62,119,904				65,872,014	62,119,904
Increase in Treasury Stock											$ 289,681,000
Parent Company [Member] | Class A [Member] | Share Repurchase Program [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock, Shares, Acquired (in shares) | shares											2,021,000
Parent Company [Member] | Class A [Member] | Share Repurchase Program [Member] | Minimum [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share) | $ / shares											$ 80.05
Parent Company [Member] | Class A [Member] | Share Repurchase Program [Member] | Maximum [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock Acquired, Market Value Per Share (in dollars per share) | $ / shares											$ 112.30
Parent Company [Member] | Class A [Member] | Net Settlement of Share Based Awards [Member]
Condensed Financial Statements, Captions [Line Items]
Treasury Stock, Shares, Acquired (in shares) | shares											1,085,000
Parent Company [Member] | Class A [Member] | 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											$ 79.47
Parent Company [Member] | Class A [Member] | 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											$ 115.30
Parent Company [Member] | 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			86				82				86	82
Common Stock Shares Cancelled (in shares) | shares			1								1