Supplemental Financial Information (Details) - USD ($) $ / shares in Units, $ 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
Quarterly Financial Information Disclosure [Abstract]
Net Revenues	$ 927,308	$ 402,515	$ 507,075	$ 427,007	$ 660,127	$ 402,198	$ 531,046	$ 415,327	$ 2,263,905	$ 2,008,698	$ 2,064,705
Total Expenses	600,593	338,829	420,346	377,704	503,404	331,854	404,212	331,517	1,737,472	1,570,987	1,522,628
Income Before Income from Equity Method Investments and Income Taxes	326,715	63,686	86,729	49,303	156,723	70,344	126,834	83,810	526,433	437,711	542,077
Income from Equity Method Investments	5,846	3,111	2,313	3,128	3,770	2,562	2,453	2,211	14,398	10,996	9,294
Income Before Income Taxes	332,561	66,797	89,042	52,431	160,493	72,906	129,287	86,021	540,831	448,707	551,371
Provision for Income Taxes	77,109	15,677	21,814	13,551	34,793	20,402	32,030	7,821	128,151	95,046	108,520
Net Income	255,452	51,120	67,228	38,880	125,700	52,504	97,257	78,200	412,680	353,661	442,851
Net Income Attributable to Noncontrolling Interest	35,075	8,510	10,816	7,705	20,516	9,226	15,515	10,968	62,106	56,225	65,611
Net Income Attributable to Evercore Inc.	$ 220,377	$ 42,610	$ 56,412	$ 31,175	$ 105,184	$ 43,278	$ 81,742	$ 67,232	$ 350,574	$ 297,436	$ 377,240
Net Income (Loss) Attributable to Evercore Inc. Common Shareholders
Basic (in dollars per share)	$ 5.40	$ 1.05	$ 1.39	$ 0.78	$ 2.68	$ 1.09	$ 2.02	$ 1.66	$ 8.64	$ 7.44	$ 9.29
Diluted (in dollars per share)	5.02	1.01	1.35	0.74	2.48	1.01	1.88	1.52	8.22	6.89	$ 8.33
Dividends Declared Per Share of Class A Common Stock (in dollars per share)	$ 0.61	$ 0.58	$ 0.58	$ 0.58	$ 0.58	$ 0.58	$ 0.58	$ 0.50	$ 2.35	$ 2.24