| Document and Entity Information - shares | 3 Months Ended | |
| Mar. 31, 2023 | Apr. 21, 2023 | |
| Document and Entity Information [Abstract] | ||
| Document Type | 10-Q/A | |
| Document Quarterly Report | true | |
| Document Transition Report | false | |
| Document Period End Date | Mar. 31, 2023 | |
| 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 State Or Province | TX | |
| Entity Address, Address Line One | 6565 Hillcrest Avenue | |
| Entity Address, City or Town | Dallas | |
| Entity Address, Postal Zip Code | 75205 | |
| City Area Code | 214 | |
| Local Phone Number | 855-2177 | |
| Title of 12(b) Security | Common Stock, par value $0.01 per share | |
| Trading Symbol | HTH | |
| Security Exchange Name | NYSE | |
| Entity Current Reporting Status | Yes | |
| Entity Interactive Data Current | Yes | |
| Entity Filer Category | Large Accelerated Filer | |
| Entity Small Business | false | |
| Entity Emerging Growth Company | false | |
| Entity Shell Company | false | |
| Entity Common Stock, Shares Outstanding | 65,023,881 | |
| Entity Central Index Key | 0001265131 | |
| Current Fiscal Year End Date | --12-31 | |
| Document Fiscal Year Focus | 2023 | |
| Document Fiscal Period Focus | Q1 | |
| Amendment Flag | false |
