| Document and Entity Information | Dec. 09, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 9, 2021 |
| Entity Registrant Name | Bank7 Corp. |
| Entity Incorporation, State or Country Code | OK |
| Entity File Number | 001-38656 |
| Entity Tax Identification Number | 20-0764349 |
| Entity Address, Address Line One | 1039 N.W. 63rd Street |
| Entity Address, City or Town | Oklahoma City |
| Entity Address, State or Province | OK |
| Entity Address, Postal Zip Code | 73116 |
| City Area Code | 405 |
| Local Phone Number | 810-8600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001746129 |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | BSVN |
| Security Exchange Name | NASDAQ |
