v3.26.1
Cover - shares
3 Months Ended
Mar. 31, 2026
May 05, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-41633  
Entity Registrant Name Burke & Herbert Financial Services Corp.  
Entity Incorporation, State or Country Code VA  
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  
Title of 12(b) Security Common Stock, par value $0.50 per share  
Trading Symbol BHRB  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   20,149,806
Entity Central Index Key 0001964333  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Current Fiscal Year End Date --12-31