v2.4.0.6
Document And Entity Information
9 Months Ended
Sep. 30, 2011
Nov. 04, 2011
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2011  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2011  
Entity Registrant Name WisdomTree Investments, Inc.  
Entity Central Index Key 0000880631  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   115,961,628