Parent Company Financial Information - Schedule of Condensed Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Expense
Income tax benefit		$ (2,369)	$ (8,286)	$ (4,277)
Net income		22,692	$ 44,013	$ 36,165
Burke & Herbert Financial Services Corp.
Income
Dividends from bank subsidiary	$ 5,936	18,997
Total Income	5,936	18,997
Expense
Salaries and employee benefit	426	2,052
Other operating expenses	568	4,826
Total Expense	994	6,878
Income (loss) before income tax benefit and equity in undistributed income of subsidiaries	4,942	12,119
Income tax benefit	209	1,445
Income (loss) before equity in undistributed income of subsidiaries	5,151	13,564
Equity in undistributed earnings of subsidiary	38,862	9,128
Net income	$ 44,013	$ 22,692