Supplemental Financial Information (Details) - USD ($) $ / shares in Units, $ 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
Quarterly Financial Information Disclosure [Abstract]
Net Revenues	$ 771,406	$ 381,259	$ 448,477	$ 463,563	$ 540,031	$ 406,601	$ 370,470	$ 387,247	$ 2,064,705	$ 1,704,349	$ 1,440,052
Total Expenses	521,200	306,719	343,695	351,014	355,885	319,531	324,204	275,918	1,522,628	1,275,538	1,178,878
Income Before Income from Equity Method Investments and Income Taxes	250,206	74,540	104,782	112,549	184,146	87,070	46,266	111,329	542,077	428,811	261,174
Income from Equity Method Investments	2,452	2,298	2,419	2,125	3,331	1,827	2,070	1,610	9,294	8,838	6,641
Income Before Income Taxes	252,658	76,838	107,201	114,674	187,477	88,897	48,336	112,939	551,371	437,649	267,815
Provision for Income Taxes	60,502	17,539	25,541	4,938	188,876	28,815	22,459	18,292	108,520	258,442	119,303
Net Income	192,156	59,299	81,660	109,736	(1,399)	60,082	25,877	94,647	442,851	179,207	148,512
Net Income Attributable to Noncontrolling Interest	28,851	9,838	12,729	14,193	18,013	14,171	7,693	13,876	65,611	53,753	40,984
Net Income Attributable to Evercore Inc.	$ 163,305	$ 49,461	$ 68,931	$ 95,543	$ (19,412)	$ 45,911	$ 18,184	$ 80,771	$ 377,240	$ 125,454	$ 107,528
Net Income Per Share Attributable to Evercore Inc. Common Shareholders
Basic (in dollars per share)	$ 4.07	$ 1.21	$ 1.69	$ 2.36	$ (0.50)	$ 1.18	$ 0.45	$ 2.00	$ 9.29	$ 3.16	$ 2.74
Diluted (in dollars per share)	3.67	1.08	1.52	2.10	(0.50)	1.04	0.41	1.76	8.33	2.80	$ 2.43
Dividends Declared Per Share of Class A Common Stock (in dollars per share)	$ 0.50	$ 0.50	$ 0.50	$ 0.40	$ 0.40	$ 0.34	$ 0.34	$ 0.34	$ 1.90	$ 1.42