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Loans And Allowance For Loan Losses (Schedule Of Loans With Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	$ 482,953us-gaap_NotesReceivableNet	$ 455,734us-gaap_NotesReceivableNet
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	446,521us-gaap_NotesReceivableNet / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	417,939us-gaap_NotesReceivableNet / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Other Assets Especially Mentioned [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	18,950us-gaap_NotesReceivableNet / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	19,043us-gaap_NotesReceivableNet / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	17,482us-gaap_NotesReceivableNet / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	18,752us-gaap_NotesReceivableNet / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan
Commercial Real Estate Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	343,183us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateMember	325,949us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateMember
Commercial Real Estate Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	319,509us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	302,376us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Commercial Real Estate Mortgages [Member] | Other Assets Especially Mentioned [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	11,425us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	11,501us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Commercial Real Estate Mortgages [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	12,249us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	12,072us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Commercial Real Estate Mortgages [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan
Commercial Real Estate Mortgages [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	82,497us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	73,893us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	72,206us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	62,226us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Commercial And Industrial [Member] | Other Assets Especially Mentioned [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	6,535us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	7,349us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	3,756us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	4,318us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Commercial And Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan
Commercial And Industrial [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan
Commercial Construction And Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	25,725us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_CommercialConstructionAndLandDevelopmentMember	25,421us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_CommercialConstructionAndLandDevelopmentMember
Commercial Construction And Land Development [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	23,666us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_CommercialConstructionAndLandDevelopmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	23,290us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_CommercialConstructionAndLandDevelopmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Commercial Construction And Land Development [Member] | Other Assets Especially Mentioned [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	799us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_CommercialConstructionAndLandDevelopmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Commercial Construction And Land Development [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	1,260us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_CommercialConstructionAndLandDevelopmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	2,131us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_CommercialConstructionAndLandDevelopmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Commercial Construction And Land Development [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan
Commercial Construction And Land Development [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan
Agriculture And Other Loans To Farmers [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	31,548us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_AgricultureAndOtherLoansToFarmersMember	30,471us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_AgricultureAndOtherLoansToFarmersMember
Agriculture And Other Loans To Farmers [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	31,140us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_AgricultureAndOtherLoansToFarmersMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	30,047us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_AgricultureAndOtherLoansToFarmersMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Agriculture And Other Loans To Farmers [Member] | Other Assets Especially Mentioned [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	191us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_AgricultureAndOtherLoansToFarmersMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	193us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_AgricultureAndOtherLoansToFarmersMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Agriculture And Other Loans To Farmers [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan	217us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_AgricultureAndOtherLoansToFarmersMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	231us-gaap_NotesReceivableNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = bhb_AgricultureAndOtherLoansToFarmersMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Agriculture And Other Loans To Farmers [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan
Agriculture And Other Loans To Farmers [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial loan

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- Definition

Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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