Noncontrolling Interest - Schedule of Noncontrolling Interest (Details)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Evercore LP [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)	12.00%	14.00%	14.00%
EWM [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)	38.00%	38.00%	38.00%
Private Capital Advisory L.P. (PCA) [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)	25.00%	39.00%	39.00%
ECB [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)	0.00%	0.00%	28.00%