Document and Entity Information - shares
9 Months Ended
Sep. 30, 2018
Oct. 26, 2018
Entity Registrant Name Victory Capital Holdings, Inc.  
Entity Central Index Key 0001570827  
Document Type 10-Q  
Document Period End Date Sep. 30, 2018  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Class A    
Entity Common Stock, Shares Outstanding   14,383,572
Class B    
Entity Common Stock, Shares Outstanding   53,361,542