| Cover | Oct. 31, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 31, 2023 |
| Entity Registrant Name | HCI Group, Inc. |
| Entity Central Index Key | 0001400810 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-34126 |
| Entity Incorporation State Country Code | FL |
| Entity Tax Identification Number | 20-5961396 |
| Entity Address, Address Line One | 3802 Coconut Palm Drive |
| Entity Address, City or Town | Tampa |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33619 |
| City Area Code | 813 |
| Local Phone Number | 405-3600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of each class | Common Stock |
| Trading Symbol(s) | HCI |
| Name of each exchange on which registered | NYSE |
