Noncontrolling Interest - Schedule of Noncontrolling Interest (Details)	Mar. 31, 2018	Mar. 31, 2017
Evercore LP [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)	11.00%	13.00%
Evercore Wealth Management [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)	38.00%	38.00%
Private Capital Advisory L.P. (PCA) [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)	10.00%	26.00%