Evercore Inc. (Parent Company Only) Financial Statements - Condensed Statements of Operations (Parent Company Only) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues
Other Revenue, Including Interest									$ 87,492	$ 16,885	$ 11,259
Total Revenues									1,724,345	1,456,790	1,240,248
Interest Expense									19,996	16,738	16,975
Net Revenues	$ 540,031	$ 406,601	$ 370,470	$ 387,247	$ 445,369	$ 386,314	$ 350,656	$ 257,713	1,704,349	1,440,052	1,223,273
Expenses
Total Expenses	355,885	319,531	324,204	275,918	348,010	301,229	288,051	241,588	1,275,538	1,178,878	1,094,603
Provision for Income Taxes	188,876	28,815	22,459	18,292	39,913	38,980	30,676	9,734	258,442	119,303	77,030
Net Income	$ (1,399)	$ 60,082	$ 25,877	$ 94,647	$ 59,958	$ 47,283	$ 33,593	$ 7,678	179,207	148,512	57,690
Parent Company [Member]
Revenues
Other Revenue, Including Interest									86,784	8,385	7,818
Total Revenues									86,784	8,385	7,818
Interest Expense									9,249	8,385	7,818
Net Revenues									77,535	0	0
Expenses
Total Expenses									0	0	0
Operating Income									77,535	0	0
Equity in Income of Subsidiary									287,440	209,841	103,931
Provision for Income Taxes									239,521	102,313	61,068
Net Income									$ 125,454	$ 107,528	$ 42,863