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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 | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Loans And Allowance For Loan Losses [Abstract] |  |
Extended maturity and adjusted interest rate | $ 97 bhb_FinancingReceivableModificationsPostModificationExtendedMaturityAndAdjustedInterestRate | $ 79 bhb_FinancingReceivableModificationsPostModificationExtendedMaturityAndAdjustedInterestRate
Extended amortization and adjusted interest rate | 30 bhb_FinancingReceivableModificationsPostModificationExtendedAmortizationAndAdjustedInterestRate |
Court ordered concession |  | 284 bhb_FinancingReceivableModificationsPostModificationCourtOrderedConcession
Total | $ 127 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | $ 363 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2

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- Definition Financing receivable modifications, post-modification, court ordered concession. + References No definition available. + Details
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Namespace Prefix: | bhb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Financing Receivable Modifications Post Modification Extended Amortization And Adjusted Interest Rate + References No definition available. + Details
Name: | bhb_FinancingReceivableModificationsPostModificationExtendedAmortizationAndAdjustedInterestRate
Namespace Prefix: | bhb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Financing receivable modifications, post-modification, extended maturity and adjusted interest rate. + References No definition available. + Details
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Namespace Prefix: | bhb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- 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=28368275&loc=SL6953676-111524 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | duration

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- Details
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