| Document and Entity Information | Jan. 23, 2020 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0000351569 |
| Document Type | 8-K |
| Document Period End Date | Jan. 23, 2020 |
| Entity Registrant Name | Ameris Bancorp |
| Entity Incorporation State Country Code | GA |
| Entity File Number | 001-13901 |
| Entity Tax Identification Number | 58-1456434 |
| Entity Address, Address Line One | 3490 Piedmont Road N.E. |
| Entity Address, Address Line Two | Suite 1550 |
| Entity Address, City or Town | Atlanta |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30305 |
| City Area Code | (404) |
| Local Phone Number | 639-6500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $1.00 per share |
| Trading Symbol | ABCB |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
