Changes In Noncontrolling Interest (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Noncontrolling Interest [Line Items]
Beginning balance				$ 58,162					$ 58,162
Operating income	(5,963)	(2,172)	(4,207)	1,752	2,682	466	(2,998)	(3,729)	(10,590)	(3,579)	(8,851)
Total comprehensive income									(11,859)	(1,361)	(8,097)
Ending balance	62,243				58,162				62,243	58,162
Noncontrolling Interest
Noncontrolling Interest [Line Items]
Beginning balance				58,162				66,542	58,162	66,542	29,361
Operating income									10,590	3,579	8,851
Other comprehensive income (loss)									1,269	(2,218)	(754)
Total comprehensive income									11,859	1,361	8,097
Evercore LP Units Purchased or Converted into Class A Common Stock									(9,867)	(12,268)	(9,834)
Amortization and Vesting of LP Units									21,697	21,057	20,059
Distributions to Noncontrolling Interests									(16,528)	(19,087)	(19,513)
Issuance of noncontrolling interest									469	917	4,381
Other									(3,549)	(360)	852
Total other items									(7,778)	(9,741)	29,084
Ending balance	62,243				58,162				62,243	58,162	66,542
Noncontrolling Interest | AS
Noncontrolling Interest [Line Items]
Fair value of noncontrolling interest in AS											$ 33,139