Noncontrolling Interest - Changes In Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance				$ 249,819					$ 249,819
Comprehensive Income (Loss):
Net Income Attributable to Noncontrolling Interest	$ 20,516	$ 9,226	$ 15,515	10,968	$ 28,851	$ 9,838	$ 12,729	$ 14,193	56,225	$ 65,611	$ 53,753
Total Comprehensive Income									56,738	65,408	57,128
Evercore LP Units Purchased or Converted into Class A Shares									17,825	23,968	36,963
Total Other Items									(104,253)	(66,717)	(36,879)
Ending balance	256,534				249,819				256,534	249,819
Noncontrolling Interest [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance				$ 249,819				$ 252,404	249,819	252,404	256,033
Comprehensive Income (Loss):
Net Income Attributable to Noncontrolling Interest									56,225	65,611	53,753
Other Comprehensive Income (Loss)									513	(203)	3,375
Total Comprehensive Income									56,738	65,408	57,128
Evercore LP Units Purchased or Converted into Class A Shares									(15,142)	(46,594)	(47,263)
Amortization and Vesting of LP Units/Interests									27,890	19,860	14,922
Distributions to Noncontrolling Interests									(54,706)	(41,413)	(36,374)
Issuance of Noncontrolling Interest									3,368	1,165	8,460
Purchase of Noncontrolling Interest									(11,433)	(1,011)	(281)
Other, net									0	0	(221)
Total Other Items									(62,771)	(41,259)	(28,416)
Ending balance	$ 256,534				$ 249,819				$ 256,534	$ 249,819	$ 252,404