| Cover | Sep. 14, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 14, 2021 |
| Entity Registrant Name | CARTER BANKSHARES, INC. |
| Entity Incorporation, State or Country Code | VA |
| Entity File Number | 001-39731 |
| Entity Tax Identification Number | 85-3365661 |
| Entity Address, Address Line One | 1300 Kings Mountain Road |
| Entity Address, City or Town | Martinsville |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 24112 |
| City Area Code | 276 |
| Local Phone Number | 656-1776 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $1.00 par value |
| Trading Symbol | CARE |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001829576 |
| Document Fiscal Period Focus | Q3 |
| Document Fiscal Year Focus | 2021 |
| Amendment Flag | false |
