Noncontrolling Interest (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Feb. 28, 2010
Noncontrolling Interest [Line Items]
Net income (Loss) attributable to noncontrolling interest discontinued operation		$ (1,002)		$ (1,659)
Issued LP Units						500
Cash value of redemption of LP Units Issues	16,500		16,500
Fair value of limited partners units exchanged	16,090		16,090
Redemption value accretion	21	21	63	63
Fair value of Redeemable Noncontrolling Interest	3,997		3,997		5,300
Redeemable Noncontrolling Interest	24,034		24,034		22,267
EWM [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest	49.00%		49.00%
Redeemable Noncontrolling Interest	$ 3,727		$ 3,727		$ 720
Evercore LP [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest	18.00%		18.00%
ECB [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest	28.00%		28.00%
Atalanta Sosnoff Capital L.L.C. [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest	34.00%		34.00%
Institutional Equities [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest	37.00%		37.00%
Evercore Trust Company NA [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest	14.00%		14.00%