| Document and Entity Information | Jan. 28, 2021 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 28, 2021 |
| Entity File Number | 1-31987 |
| Entity Registrant Name | Hilltop Holdings Inc. |
| Entity Incorporation, State or Country Code | MD |
| Entity Tax Identification Number | 84-1477939 |
| Entity Address, Address Line One | 6565 Hillcrest Avenue |
| Entity Address, City or Town | Dallas |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75205 |
| City Area Code | 214 |
| Local Phone Number | 855-2177 |
| 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 | HTH |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001265131 |
| Amendment Flag | false |
