v3.26.1
Share-Based Compensation - Narrative (Details)
3 Months Ended
Mar. 30, 2023
shares
Mar. 31, 2026
USD ($)
shares
Mar. 31, 2025
USD ($)
shares
May 03, 2024
Dec. 31, 2019
shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Compensation cost for awards granted | $   $ 1,100,000 $ 1,300,000    
Total income tax benefit | $   $ 248,500 $ 264,700    
Summit Financial Group, Inc          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Common stock portion, number of Burke & Herbert stock for each share of Summit common stock converted (in shares)       0.5043  
Restricted Stock Units (RSUs)          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Shares issued during period (in shares)   58,605 77,441    
Restricted Stock Units (RSUs) | Minimum          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Award vesting period (in years) 3 years 3 years      
Restricted Stock Units (RSUs) | Maximum          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Award vesting period (in years) 5 years 5 years      
Restricted Stock Units (RSUs) | 2019 Stock Incentive Plan          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Shares authorized to be issued (in shares)         240,000
Right to receive common share (in shares)         1
Restricted Stock Units (RSUs) | 2023 Stock Incentive Plan          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Shares authorized to be issued (in shares) 250,000 474,578      
Restricted Stock Units (RSUs) | 2019 And 2023 Stock Incentive Plan          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Unrecognized compensation costs | $   $ 8,700,000      
Average period for cost to be recognized (in years)   1 year 3 months 3 days      
Performance-based Restricted Stock Units          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Vesting percentage (as a percent)   100.00%      
Employee Stock | 2023 Employee Stock Purchase Plan          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Shares authorized to be issued (in shares)   473,978      
Number of shares reserved for issuance (in shares) 250,000        
Number of shares available for grant (in shares)   442,165      
Purchase price of common stock (as a percent) 85.00%        
Eligible employees, subscription rate (as a percent) 15.00%        
Stock Appreciation Rights (SARs)          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Award vesting period (in years)   7 years      
Unrecognized compensation costs | $   $ 225,600      
Average period for cost to be recognized (in years)   1 year 11 months 15 days      
Exercisable during period (as a percent)   14.30%      
Award expiration period (in years)   10 years      
Total fair value exercised | $   $ 328,600      
Vested (in shares)   73,200