| Document and Entity Information | Apr. 28, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Apr. 28, 2021 |
| Entity File Number | 001-12669 |
| Entity Registrant Name | SOUTH STATE CORP |
| Entity Incorporation, State or Country Code | SC |
| Entity Tax Identification Number | 57-0799315 |
| Entity Address, Address Line One | 1101 First Street South, Suite 202, |
| Entity Address, City or Town | Winter Haven |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33880 |
| City Area Code | 863 |
| Local Phone Number | 293-4710 |
| 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 $2.50 per share |
| Trading Symbol | SSB |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000764038 |
| Amendment Flag | false |
