Evercore Inc. (Parent Company Only) Financial Statements - Condensed Statements of Cash Flow (Parent Company Only) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	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
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 255,452	$ 51,120	$ 67,228	$ 38,880	$ 125,700	$ 52,504	$ 97,257	$ 78,200	$ 412,680	$ 353,661	$ 442,851
Increase (Decrease) in Deferred Income Taxes									13,824	(10,503)	(3,981)
Increase (Decrease) in Other Operating Assets									(19,043)	(58,962)	(21,830)
Taxes Payable									11,946	(30,221)	16,099
Net Cash Provided by Operating Activities									978,371	504,697	849,574
CASH FLOWS FROM INVESTING ACTIVITIES
Net Cash Provided by (Used In) Investing Activities									(483,871)	(373,471)	(212,566)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of Notes Payable									0	205,718	0
Payments of Ordinary Dividends, Common Stock									(106,582)	(96,803)	(77,302)
Net Cash Provided by (Used in) Financing Activities									(307,793)	(290,009)	(452,927)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash									194,338	(156,210)	182,711
Cash, Cash Equivalents and Restricted Cash-Beginning of Period				643,886				800,096	643,886	800,096	617,385
Cash, Cash Equivalents and Restricted Cash-End of Period	838,224				643,886				838,224	643,886	800,096
SUPPLEMENTAL CASH FLOW DISCLOSURE
Accrued Dividends									13,734	14,642	12,288
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income									350,574	297,436	377,240
Undistributed Income Of Subsidiary									(451,129)	(383,717)	(473,978)
Increase (Decrease) in Deferred Income Taxes									11,395	(3,966)	(5,311)
Accretion On Long Term Debt									435	336	265
Increase (Decrease) in Other Operating Assets									(6,899)	(18,704)	9,689
Taxes Payable									0	(30,749)	30,749
Net Cash Provided by Operating Activities									(95,624)	(139,364)	(61,346)
CASH FLOWS FROM INVESTING ACTIVITIES
Investment In Subsidiary									202,206	30,449	138,648
Net Cash Provided by (Used In) Investing Activities									202,206	30,449	138,648
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of Notes Payable									0	205,718	0
Payments of Ordinary Dividends, Common Stock									(106,582)	(96,803)	(77,302)
Net Cash Provided by (Used in) Financing Activities									(106,582)	108,915	(77,302)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash									0	0	0
Cash, Cash Equivalents and Restricted Cash-Beginning of Period				$ 0				$ 0	0	0	0
Cash, Cash Equivalents and Restricted Cash-End of Period	$ 0				$ 0				0	0	0
SUPPLEMENTAL CASH FLOW DISCLOSURE
Accrued Dividends									$ 13,734	$ 14,642	$ 12,288