Share-Based Compensation - Narrative (Details)		3 Months Ended		6 Months Ended
Share-Based Compensation - Narrative (Details)	Mar. 30, 2023 shares	Jun. 30, 2025 USD ($) shares	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) shares	Jun. 30, 2024 USD ($) shares	May 03, 2024 shares	Dec. 31, 2023 shares	Dec. 31, 2019 shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation cost for awards granted \| $		$ 1,500,000	$ 937,600	$ 2,400,000	$ 1,400,000
Total income tax benefit \| $		310,400	$ 196,900	$ 499,500	$ 291,500
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)				96,132	48,450
Unrecognized compensation costs \| $		$ 7,800,000		$ 7,800,000
Average period for cost to be recognized (in years)				1 year 5 months 23 days
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)		324,887		324,887			250,000
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]
Number of shares reserved for issuance (in shares)	250,000
Number of shares available for grant (in shares)		305,210		305,210
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 \| $		$ 383,200		$ 383,200
Average period for cost to be recognized (in years)				2 years 1 month 17 days
Exercisable during period (as a percent)		14.30%		14.30%
Award expiration period (in years)				10 years
Total fair value exercised \| $				$ 657,000
Vested (in shares)				78,000

Burke & Herbert Financial Services Corp. 10-Q