Noncontrolling Interest (Changes In Noncontrolling Interest) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Noncontrolling Interest [Line Items]
Beginning balance				$ 66,542					$ 66,542
Operating income	(1,831)	536	3,274	4,110	1,610	6,023	(1,330)	4,352	6,089	10,655	3,509
Evercore LP Units Purchased or Converted into Class A Common Stock									(79,528)	(68,895)	(62,808)
Distributions to Noncontrolling Interests									(19,087)	(19,513)	(19,741)
Issuance of noncontrolling interest in IE									1,009	4,381	17,395
Ending balance	58,162				66,542				58,162	66,542
Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Beginning balance				66,542				29,361	66,542	29,361	15,978
Operating income									3,579	8,851	1,816
Other comprehensive income (loss)									(2,218)	(754)	4,546
Total comprehensive income									1,361	8,097	6,362
Evercore LP Units Purchased or Converted into Class A Common Stock									(12,268)	(9,834)	(5,623)
Issuance and sale of LP Units											15,000
Amortization and Vesting of LP Units									21,057	20,059	8,552
Distributions to Noncontrolling Interests									(19,087)	(19,513)	(19,741)
Issuance of noncontrolling interest in IE									917	4,381
Other									(360)	852	1,061
Total other items									(9,741)	29,084	7,021
Ending balance	58,162				66,542				58,162	66,542	29,361
EAM [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Fair value of noncontrolling interest											5,068
ETC [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Fair value of noncontrolling interest											2,704
AS [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Fair value of noncontrolling interest										$ 33,139