Noncontrolling Interest - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 29, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Noncontrolling Interest [Line Items]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest		$ 370	$ (131)	$ (367)	$ (327)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest		$ (1,097)	$ 327	(1,481)	(354)
Purchase of Noncontrolling Interest				$ 0	$ 1,123
Evercore LP [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)		14.00%		14.00%
ECB [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)	28.00%
Purchase of Noncontrolling Interest	$ 6,482
Evercore Wealth Management [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)		38.00%		38.00%
Atalanta Sosnoff [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)						34.00%
PCA [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest (as a percent)		39.00%		39.00%