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Loans And Allowance For Loan Losses (Summary Of Post-Modification Balance of Troubled Debt Restructurings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Loans And Allowance For Loan Losses [Abstract]
Extended maturity and adjusted interest rate	$ 472bhb_FinancingReceivableModificationsPostModificationExtendedMaturityAndAdjustedInterestRate
Extended amortization and adjusted interest rate	18bhb_FinancingReceivableModificationsPostModificationExtendedAmortizationAndAdjustedInterestRate
Total	$ 490us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2

X

- Definition

Financing Receivable Modifications Post Modification Extended Amortization And Adjusted Interest Rate

+ References

No definition available.

+ Details

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X

- Definition

Financing receivable modifications, post-modification, extended maturity and adjusted interest rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	bhb_
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X

- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

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