| Document And Entity Information | Mar. 23, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Current Fiscal Year End Date | --12-31 |
| Document Period End Date | Mar. 23, 2022 |
| Entity Registrant Name | Velocity Financial, Inc. |
| Entity Central Index Key | 0001692376 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-39183 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 46-0659719 |
| Entity Address, Address Line One | 30699 Russell Ranch Road, Suite 295 |
| Entity Address, City or Town | Westlake Village |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 91362 |
| City Area Code | (818) |
| Local Phone Number | 532-3700 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | VEL |
| Security Exchange Name | NYSE |
