Net Income Per Share Attributable to Evercore Inc. Common Shareholders - Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ 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
Basic Net Income Per Share Attributable to Evercore Inc. Common Shareholders
Weighted average shares of Class A common stock outstanding, including vested RSUs (in shares)									39,641	39,220	37,161
Basic net income per share attributable to Evercore Inc. common shareholders (in dollars per share)	$ (0.50)	$ 1.18	$ 0.45	$ 2.00	$ 1.11	$ 0.89	$ 0.61	$ 0.13	$ 3.16	$ 2.74	$ 1.15
Diluted Net Income Per Share Attributable to Evercore Inc. Common Shareholders
Weighted average shares of Class A common stock outstanding, including vested RSUs (in shares)									39,641	39,220	37,161
Diluted weighted average of Class A Shares outstanding (in shares)									44,826	44,193	43,699
Diluted net income per share attributable to Evercore Inc. common shareholders (in dollars per share)	$ (0.50)	$ 1.04	$ 0.41	$ 1.76	$ 0.98	$ 0.79	$ 0.55	$ 0.12	$ 2.80	$ 2.43	$ 0.98
Class A [Member]
Basic Net Income Per Share Attributable to Evercore Inc. Common Shareholders
Net income attributable to Evercore Inc. common shareholders									$ 125,454	$ 107,528	$ 42,863
Weighted average shares of Class A common stock outstanding, including vested RSUs (in shares)									39,641	39,220	37,161
Basic net income per share attributable to Evercore Inc. common shareholders (in dollars per share)									$ 3.16	$ 2.74	$ 1.15
Diluted Net Income Per Share Attributable to Evercore Inc. Common Shareholders
Net income attributable to Evercore Inc. common shareholders									$ 125,454	$ 107,528	$ 42,863
Noncontrolling interest related to the assumed exchange of LP Units for Class A Shares
Associated corporate taxes related to the assumed elimination of Noncontrolling Interest described above
Diluted net income attributable to Evercore Inc. common shareholders									$ 125,454	$ 107,528	$ 42,863
Weighted average shares of Class A common stock outstanding, including vested RSUs (in shares)									39,641	39,220	37,161
Assumed exchange of LP Units for Class A Shares (in shares)									842	0	0
Additional shares of the Company's common stock assumed to be issued pursuant to non-vested RSUs and deferred consideration, as calculated using the Treasury Stock Method (in shares)									2,719	2,065	2,162
Shares that are contingently issuable (in shares)									1,624	2,908	1,747
Assumed conversion of Warrants issued (in shares)									0	0	2,629
Diluted weighted average of Class A Shares outstanding (in shares)									44,826	44,193	43,699
Diluted net income per share attributable to Evercore Inc. common shareholders (in dollars per share)									$ 2.80	$ 2.43	$ 0.98