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Business Combination - Narrative (Details)
May 03, 2024
USD ($)
shares
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Jun. 30, 2024
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Business Combination [Line Items]              
Preliminary goodwill   $ 34,149,000 $ 32,842,000 $ 32,783,000 $ 32,783,000 $ 0 $ 0
Summit Financial Group, Inc              
Business Combination [Line Items]              
Common stock portion, number of Burke & Herbert stock for each share of Summit common stock converted (in shares) | shares 0.5043            
Consideration payable (in shares) | shares 7,405,772            
Preferred stock, fixed rate (as a percent) 6.00%            
Preliminary goodwill $ 34,149,000 $ 34,149,000   $ 32,783,000      
Goodwill, expected tax deductible amount $ 0            
Estimated weighted average life (in years) 7 years            
Goodwill and intangibles $ 68,760,000            
Summit Financial Group, Inc | Financial Asset Acquired with Credit Deterioration              
Business Combination [Line Items]              
Business combination, acquired receivable, fair value 380,800,000            
Business combination, acquired receivable, gross contractual amount $ 442,300,000