Employee Benefit Plans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Evercore Europe Defined Contribution Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Company contributions to Plan	$ 3,360	$ 2,094	$ 1,496
Defined Contribution Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Company contributions to Plan	$ 0	$ 0	$ 0
Minimum
Defined Benefit Plan Disclosure [Line Items]
Define contribution plans annual contribution percentage by employee	15.00%
Define contribution plans additional contribution percentage by employee	7.50%
Defined contribution plans employee contribution percentage of eligible compensation matched by employer	5.00%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Define contribution plans annual contribution percentage by employee	50.00%
Define contribution plans additional contribution percentage by employee	10.00%
Defined contribution plans employee contribution percentage of eligible compensation matched by employer	10.00%