Regulatory Capital Matters - Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations (Details) $ in Thousands	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Consolidated
Total Capital to risk-weighted assets
Actual Amount	$ 930,753	$ 443,799
Actual Ratio	0.1457	0.1788
Minimum Required for Capital Amount	$ 670,590	$ 260,694
Minimum Required for Capital Ratio	0.105	0.105
Minimum Required to be Well Capitalized Amount	$ 638,658	$ 248,280
Tier 1 (Core) Capital to risk-weighted assets
Actual Amount	$ 763,842	$ 418,244
Actual Ratio	0.1196	0.1685
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Amount	$ 542,859	$ 211,038
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Ratio	0.085	0.085
To Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 510,926	$ 198,624
Common Tier 1 (CET 1) to risk-weighted assets
Actual Amount	$ 736,416	$ 418,244
Actual Ratio	0.1153	0.1685
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Amount	$ 447,060	$ 173,796
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Ratio	0.070	0.070
To Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 415,127	$ 161,382
Tier 1 (Core) Capital to average assets (leverage ratio)
Actual Amount	$ 736,416	$ 418,244
Actual Ratio	0.0980	0.1131
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Amount	$ 311,904	$ 147,965
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Ratio	0.040	0.040
To Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 389,880	$ 184,957
Burke & Herbert Bank & Trust
Total Capital to risk-weighted assets
Actual Amount	$ 919,843	$ 442,414
Actual Ratio	0.1441	0.1782
Minimum Required for Capital Amount	$ 670,028	$ 260,626
Minimum Required for Capital Ratio	0.105	0.105
Minimum Required to be Well Capitalized Amount	$ 638,122	$ 248,215
Minimum Required to be Well Capitalized Ratio	0.100	0.100
Tier 1 (Core) Capital to risk-weighted assets
Actual Amount	$ 847,804	$ 416,859
Actual Ratio	0.1329	0.1679
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Amount	$ 542,404	$ 210,983
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Ratio	0.085	0.085
To Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 510,498	$ 198,572
To Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	0.080	0.080
Common Tier 1 (CET 1) to risk-weighted assets
Actual Amount	$ 847,804	$ 416,859
Actual Ratio	0.1329	0.1679
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Amount	$ 446,686	$ 173,751
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Ratio	0.070	0.070
To Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 414,779	$ 161,340
To Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	0.065	0.065
Tier 1 (Core) Capital to average assets (leverage ratio)
Actual Amount	$ 847,804	$ 416,859
Actual Ratio	0.1088	0.1127
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Amount	$ 311,616	$ 147,986
Minimum Required for Capital Adequacy Purposes (includes applicable capital conservation buffer) Ratio	0.040	0.040
To Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 389,520	$ 184,982
To Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	0.050	0.050

Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy With Buffer, Minimum

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-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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