| Cover | Jan. 29, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 29, 2021 |
| Entity File Number | 001-32590 |
| Entity Registrant Name | COMMUNITY BANKERS TRUST CORPORATION |
| Entity Central Index Key | 0001323648 |
| Entity Tax Identification Number | 20-2652949 |
| Entity Incorporation, State or Country Code | VA |
| Entity Address, Address Line One | 9954 Mayland Drive |
| Entity Address, Address Line Two | Suite 2100 |
| Entity Address, City or Town | Richmond |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 23233 |
| City Area Code | 804 |
| Local Phone Number | 934-9999 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | ESXB |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
