| Document and Entity Information | Oct. 04, 2023 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001598665 |
| Document Type | 8-K |
| Document Period End Date | Oct. 04, 2023 |
| Entity Registrant Name | HERITAGE INSURANCE HOLDINGS, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-36462 |
| Entity Tax Identification Number | 45-5338504 |
| Entity Address, Address Line One | 1401 N. Westshore Blvd |
| Entity Address, City or Town | Tampa |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33607 |
| City Area Code | (727) |
| Local Phone Number | 362-7202 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.0001 per share |
| Trading Symbol | HRTG |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
