v3.26.1
Document And Entity Information - shares
 3 Months Ended
Mar. 31, 2026
May 11, 2026
Document Information Line Items    
Entity Central Index Key 0001746129  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Fiscal Year Focus 2026  
Document Transition Report false  
Entity File Number 001-38656  
Entity Registrant Name BANK7 CORP.  
Entity Incorporation, State or Country Code OK  
Entity Tax Identification Number 20-0763496  
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 73116-7361  
City Area Code 405  
Local Phone Number 810-8600  
Title of 12(b) Security Common Stock, $0.01 par value per Share  
Trading Symbol BSVN  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   9,519,335
Amendment Flag false  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31