| Cover | Sep. 29, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 29, 2023 |
| Entity Registrant Name | Burke & Herbert Financial Services Corp. |
| Entity Incorporation, State or Country Code | VA |
| Entity File Number | 001-41633 |
| Entity Tax Identification Number | 92-0289417 |
| Entity Address, Address Line One | 100 S. Fairfax Street |
| Entity Address, City or Town | Alexandria |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 22314 |
| City Area Code | 703 |
| Local Phone Number | 666-3555 |
| Written Communications | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $.50 |
| Trading Symbol | BHRB |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001964333 |
