Noncontrolling Interest - Changes In Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance				$ 252,404					$ 252,404
Comprehensive Income (Loss):
Net Income Attributable to Noncontrolling Interest	$ 28,851	$ 9,838	$ 12,729	14,193	$ 18,013	$ 14,171	$ 7,693	$ 13,876	65,611	$ 53,753	$ 40,984
Total Comprehensive Income									65,408	57,128	37,247
Total Other Items									(66,717)	(36,879)	(50,047)
Ending balance	249,819				252,404				249,819	252,404
Noncontrolling Interest [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance				$ 252,404				$ 256,033	252,404	256,033	202,664
Comprehensive Income (Loss):
Net Income Attributable to Noncontrolling Interest									65,611	53,753	40,984
Other Comprehensive Income (Loss)									(203)	3,375	(3,737)
Total Comprehensive Income									65,408	57,128	37,247
Evercore LP Units Purchased or Converted into Class A Shares									(46,594)	(47,263)	(16,480)
Amortization and Vesting of LP Units/Interests									19,860	14,922	81,392
Distributions to Noncontrolling Interests									(41,413)	(36,374)	(38,154)
Issuance of Noncontrolling Interest									1,165	8,460	885
Purchase of Noncontrolling Interest									(1,011)	(281)	(5,225)
Deconsolidation of GCP III									0	0	(5,808)
Other, net									0	(221)	(488)
Total Other Items									(41,259)	(28,416)	(48,790)
Ending balance	$ 249,819				$ 252,404				$ 249,819	$ 252,404	$ 256,033