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Share-Based and Other Deferred Compensation (Tables)
12 Months Ended
Dec. 31, 2017
2006 and 2016 Stock Incentive Plans [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Nonvested Share Activity
The following table summarizes activity related to Service-based Awards during the year ended December 31, 2017:
 
Service-based Awards
 
Number of Shares
 
Grant Date Weighted
Average Fair Value
Unvested Balance at January 1, 2017
6,888

 
$
346,448

Granted
2,813

 
220,315

Modified

 

Forfeited
(154
)
 
(10,079
)
Vested
(2,512
)
 
(119,663
)
Unvested Balance at December 31, 2017
7,035

 
$
437,021

Evercore ISI [Member] | Acquisition Related [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Nonvested Share Activity
The following tables summarize activity related to the LP Units/Interests for the Company's equities business during the year ended December 31, 2017. In these tables, awards whose service conditions have not yet been achieved are reflected as unvested:
 
Class E LP Units
 
Number of Units
 
Grant Date Weighted
Average Fair Value
Unvested Balance at January 1, 2017
381

 
$
19,703

Granted
20

 
1,609

Modified

 

Forfeited
(14
)
 
(723
)
Vested/Performance Achieved
(387
)
 
(20,589
)
Unvested Balance at December 31, 2017

 
$

 
Class G LP Interests
 
Class H LP Interests
 
Number of Interests
 
Grant Date Weighted
Average Fair Value
 
Number of Interests
 
Grant Date Weighted
Average Fair Value
Unvested Balance at January 1, 2017
711

 
$
36,817

 
4,046

 
$
209,455

Granted
9

 
660

 
10

 
695

Modified

 

 
(4,046
)
 
(209,639
)
Forfeited
(365
)
 
(19,109
)
 
(10
)
 
(511
)
Vested/Performance Achieved
(355
)
 
(18,368
)
 

 

Unvested Balance at December 31, 2017

 
$

 

 
$

 
Class J LP Units
 
Number of Units
 
Grant Date Weighted
Average Fair Value
Unvested Balance at January 1, 2017

 
$

Issued in Exchange for Class H LP Interests(a)
1,901

 
33,985

Granted
41

 
3,212

Modified
(4
)
 
(91
)
Forfeited
(41
)
 
(834
)
Vested/Performance Achieved

 

Unvested Balance at December 31, 2017
1,897

 
$
36,272