Reasonable Representation of Each Segment's Contribution - Additional Information (Detail)	3 Months Ended
Mar. 31, 2013 Customer
Segment Reporting Information [Line Items]
Number of customers contributing more than ten percent of revenue	1

Number Of Customers Contributing More Than Ten Percent Revenue

No definition available.

Name:	evr_NumberOfCustomersContributingMoreThanTenPercentRevenue
Namespace Prefix:	evr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration