Supplemental Financial Information Supplemental Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Net Revenues	$ 660,127	$ 402,198	$ 531,046	$ 415,327	$ 771,406	$ 381,259	$ 448,477	$ 463,563	$ 2,008,698	$ 2,064,705	$ 1,704,349
Total Expenses	503,404	331,854	404,212	331,517	521,200	306,719	343,695	351,014	1,570,987	1,522,628	1,275,538
Income Before Income from Equity Method Investments and Income Taxes	156,723	70,344	126,834	83,810	250,206	74,540	104,782	112,549	437,711	542,077	428,811
Income from Equity Method Investments	3,770	2,562	2,453	2,211	2,452	2,298	2,419	2,125	10,996	9,294	8,838
Income Before Income Taxes	160,493	72,906	129,287	86,021	252,658	76,838	107,201	114,674	448,707	551,371	437,649
Provision for Income Taxes	34,793	20,402	32,030	7,821	60,502	17,539	25,541	4,938	95,046	108,520	258,442
Net Income	125,700	52,504	97,257	78,200	192,156	59,299	81,660	109,736	353,661	442,851	179,207
Net Income Attributable to Noncontrolling Interest	20,516	9,226	15,515	10,968	28,851	9,838	12,729	14,193	56,225	65,611	53,753
Net Income Attributable to Evercore Inc.	$ 105,184	$ 43,278	$ 81,742	$ 67,232	$ 163,305	$ 49,461	$ 68,931	$ 95,543	$ 297,436	$ 377,240	$ 125,454
Net Income Per Share Attributable to Evercore Inc. Common Shareholders
Basic (in dollars per share)	$ 2.68	$ 1.09	$ 2.02	$ 1.66	$ 4.07	$ 1.21	$ 1.69	$ 2.36	$ 7.44	$ 9.29	$ 3.16
Diluted (in dollars per share)	2.48	1.01	1.88	1.52	3.67	1.08	1.52	2.10	6.89	8.33	$ 2.80
Dividends Declared Per Share of Class A Common Stock (in dollars per share)	$ 0.58	$ 0.58	$ 0.58	$ 0.50	$ 0.50	$ 0.50	$ 0.50	$ 0.40	$ 2.24	$ 1.90