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v3.25.1

Defined Benefit Pension Plan - Narrative (Details) | 12 Months Ended
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Dec. 31, 2024
Retirement Benefits [Abstract] |
Defined benefit plan, vesting period | 5 years

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- Definition Defined Benefit Plan, Vesting Period + References No definition available. + Details
Name: | bhrb_DefinedBenefitPlanVestingPeriod
Namespace Prefix: | bhrb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration