| Document and Entity Information | Oct. 12, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 12, 2020 |
| Entity Registrant Name | Victory Capital Holdings, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38388 |
| Entity Tax Identification Number | 32-0402956 |
| Entity Address, Address Line One | 15935 La Cantera Parkway |
| Entity Address, City or Town | San Antonio |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 78256 |
| City Area Code | 216 |
| Local Phone Number | 898-2400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001570827 |
| Title of 12(b) Security | Class A Common Stock, Par Value $0.01 |
| Trading Symbol | VCTR |
| Security Exchange Name | NASDAQ |
