Advances and Other Borrowings -Schedule of Short-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Advance from Federal Home Loan Bank, Fiscal Year Maturity [Abstract]
Borrowed funds	$ 321,700	$ 343,100
Short-Term Debt
Advance from Federal Home Loan Bank, Fiscal Year Maturity [Abstract]
Due in 2023	171,700
Due in 2024	150,000
Borrowed funds	$ 321,700

Short-Term Debt And Other Borrowings, Maturity, Remainder of Fiscal Year

No definition available.

Name:	bhrb_ShortTermDebtAndOtherBorrowingsMaturityRemainderOfFiscalYear
Namespace Prefix:	bhrb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant