Evercore Inc. (Parent Company Only) Financial Statements - Condensed Statements of Cash Flows (Parent Company Only) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 192,156	$ 59,299	$ 81,660	$ 109,736	$ (1,399)	$ 60,082	$ 25,877	$ 94,647	$ 442,851	$ 179,207	$ 148,512
Adjustment to Tax Receivable Agreement									0	(77,535)	0
Deferred Taxes									(3,981)	148,320	10,043
(Increase) Decrease in Operating Assets:									(21,830)	(10,982)	(32,763)
Taxes Payable									16,099	(10,849)	9,097
Net Cash Provided by Operating Activities									849,574	507,236	421,886
CASH FLOWS FROM INVESTING ACTIVITIES
Net Cash Provided by (Used in) Investing Activities									(212,566)	(54,641)	(46,201)
CASH FLOWS FROM FINANCING ACTIVITIES
Payment of Notes Payable - Mizuho									0	0	(120,000)
Issuance of Notes Payable									0	0	170,000
Dividends									(77,302)	(56,521)	(51,558)
Net Cash Provided by (Used in) Financing Activities									(452,927)	(419,230)	(237,958)
Net Increase in Cash, Cash Equivalents and Restricted Cash									182,711	41,748	112,380
Cash, Cash Equivalents and Restricted Cash-Beginning of Period				617,385				575,637	617,385	575,637	463,257
Cash, Cash Equivalents and Restricted Cash-End of Period	800,096				617,385				800,096	617,385	575,637
SUPPLEMENTAL CASH FLOW DISCLOSURE
Accrued Dividends									12,288	9,815	7,836
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income									377,240	125,454	107,528
Undistributed Income of Subsidiary									(473,978)	(209,905)	(209,841)
Adjustment to Tax Receivable Agreement									0	(77,535)	0
Deferred Taxes									(5,311)	153,344	12,453
Accretion on Long-term Debt									265	250	180
(Increase) Decrease in Operating Assets:									9,689	(9,689)	0
Taxes Payable									30,749	(21,341)	6,580
Net Cash Provided by Operating Activities									(61,346)	(39,422)	(83,100)
CASH FLOWS FROM INVESTING ACTIVITIES
Investment in Subsidiary									138,648	95,943	84,658
Net Cash Provided by (Used in) Investing Activities									138,648	95,943	84,658
CASH FLOWS FROM FINANCING ACTIVITIES
Payment of Notes Payable - Mizuho									0	0	(120,000)
Issuance of Notes Payable									0	0	170,000
Dividends									(77,302)	(56,521)	(51,558)
Net Cash Provided by (Used in) Financing Activities									(77,302)	(56,521)	(1,558)
Net Increase 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									$ 12,288	$ 9,815	$ 7,836