Variable Interest Entities (Details Textual)	9 Months Ended
Sep. 30, 2014 Number_of_Limited_Partnership Number_of_Limited_Liability_Companies
Variable Interest Entities (Textual) [Abstract]
Number of limited liability companies in which some clients hold their investments	10
Number of clients in which investment advisory services are provided	2

Number of limited liability companies in which some clients hold their investments.

No definition available.

Name:	whg_NumberOfLimitedLiabilityCompaniesInWhichSomeClientsHoldTheirInvestments
Namespace Prefix:	whg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration