2.4.0.840601 - Disclosure - Loans And Allowance For Loan Losses (Narrative) (Details)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$Duration_1_1_2013_To_6_30_2013http://www.sec.gov/CIK0000743367duration2013-01-01T00:00:002013-06-30T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit12Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit14Standardhttp://www.bhbt.com/20130630loanbhb0Unit13Standardhttp://www.bhbt.com/20130630itembhb0USDUSD$2false USDfalsefalse$As_Of_12_31_2012http://www.sec.gov/CIK0000743367instant2012-12-31T00:00:000001-01-01T00:00:00Unit13Standardhttp://www.bhbt.com/20130630itembhb0Unit14Standardhttp://www.bhbt.com/20130630loanbhb0Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false truefalseDuration_1_1_2013_To_6_30_2013_us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxis_us-gaap_CommercialRealEstateMemberhttp://www.sec.gov/CIK0000743367duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseCommercial Real Estate Mortgages [Member]us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateMemberus-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxisexplicitMember4false truefalseDuration_1_1_2013_To_6_30_2013_us-gaap_RangeAxis_us-gaap_MaximumMemberhttp://www.sec.gov/CIK0000743367duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/instancepurexbrli05false truefalseDuration_1_1_2013_To_6_30_2013_us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxis_us-gaap_CommercialRealEstateMember_us-gaap_RangeAxis_us-gaap_MaximumMemberhttp://www.sec.gov/CIK0000743367duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMemberfalsefalseCommercial Real Estate Mortgages [Member]us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateMemberus-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxisexplicitMember6false truefalseDuration_1_1_2013_To_6_30_2013_us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxis_us-gaap_ResidentialMortgageMember_us-gaap_RangeAxis_us-gaap_MaximumMemberhttp://www.sec.gov/CIK0000743367duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMemberfalsefalseResidential Real Estate Mortgages [Member]us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ResidentialMortgageMemberus-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxisexplicitMember7false truefalseDuration_1_1_2013_To_6_30_2013_us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxis_us-gaap_CommercialRealEstateMember_us-gaap_RangeAxis_us-gaap_MinimumMemberhttp://www.sec.gov/CIK0000743367duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMemberfalsefalseCommercial Real Estate Mortgages [Member]us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateMemberus-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxisexplicitMember8false truefalseDuration_1_1_2013_To_6_30_2013_us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxis_us-gaap_ResidentialMortgageMember_us-gaap_RangeAxis_us-gaap_MinimumMemberhttp://www.sec.gov/CIK0000743367duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMemberfalsefalseResidential Real Estate Mortgages [Member]us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ResidentialMortgageMemberus-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxisexplicitMember9false USDtruefalse$As_Of_6_30_2013_us-gaap_FinancingReceivableTroubledDebtRestructuringAxis_us-gaap_CommercialRealEstatePortfolioSegmentMemberhttp://www.sec.gov/CIK0000743367instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseReal Estate Secured Loans [Member]us-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstatePortfolioSegmentMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberUnit14Standardhttp://www.bhbt.com/20130630loanbhb0Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$10false USDtruefalse$As_Of_12_31_2012_us-gaap_FinancingReceivableTroubledDebtRestructuringAxis_us-gaap_CommercialRealEstatePortfolioSegmentMemberhttp://www.sec.gov/CIK0000743367instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseReal Estate Secured Loans [Member]us-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstatePortfolioSegmentMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberUnit14Standardhttp://www.bhbt.com/20130630loanbhb0Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$11false truefalseAs_Of_6_30_2013_us-gaap_FinancingReceivableTroubledDebtRestructuringAxis_us-gaap_CommercialPortfolioSegmentMemberhttp://www.sec.gov/CIK0000743367instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial And Industrial [Member]us-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialPortfolioSegmentMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberUnit14Standardhttp://www.bhbt.com/20130630loanbhb012false truefalseAs_Of_12_31_2012_us-gaap_FinancingReceivableTroubledDebtRestructuringAxis_us-gaap_CommercialPortfolioSegmentMemberhttp://www.sec.gov/CIK0000743367instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseCommercial And Industrial [Member]us-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialPortfolioSegmentMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberUnit14Standardhttp://www.bhbt.com/20130630loanbhb013false USDtruefalse$As_Of_12_31_2012_us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_us-gaap_HotelMemberhttp://www.sec.gov/CIK0000743367instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseLodging Industry [Member]us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_HotelMemberus-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$14false USDtruefalse$As_Of_6_30_2012_us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_us-gaap_HotelMemberhttp://www.sec.gov/CIK0000743367instant2012-06-30T00:00:000001-01-01T00:00:00falsefalseLodging Industry [Member]us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_HotelMemberus-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3bhb_LoansAndAllowanceForLoanLossesLineItemsbhb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalse14falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Loans And Allowance For Loan Losses [Line Items]2false 4bhb_PeriodOfFixedRateInterestBeforeTransitionToVariableRatebhb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse005 yearsfalsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalse14falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaPeriod Of Fixed Rate Interest Before Transition To Variable RateNo definition available.false0Period of fixed rate interest before transition to variable rate3false 4bhb_MinimumTimelyPaymentsRequiredBeforeReversionToAccruingStatusPeriodbhb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse006 monthsfalsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalse14falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaMinimum Timely Payments Required Before Reversion To Accruing Status, periodNo definition available.false0Loan returned to accrual status, performance required, months4false 4bhb_NumberOfTroubledDebtRestructuringsPastDueAndClassifiedAsNonPerformingbhb_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse55falsefalsefalse2truefalsefalse33falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalse14falsefalsefalse00falsefalsefalsexbrli:positiveIntegerItemTypepositiveintegerNumber of Troubled Debt Restructurings Past Due And Classified As Non-PerformingNo definition available.false256Number of TDRs past due and classified as non-performing5false 4bhb_NumberOfLoansClassifiedAsTroubledDebtRestructuringsToRelationshipsbhb_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse77falsefalsefalse10truefalsefalse44falsefalsefalse11truefalsefalse33falsefalsefalse12truefalsefalse33falsefalsefalse13falsefalsefalse00falsefalsefalse14falsefalsefalse00falsefalsefalsexbrli:positiveIntegerItemTypepositiveintegerNumber Of Loans, Classified As Troubled Debt Restructurings, To RelationshipsNo definition available.false256Number of loans, classified as TDRs, to relationships6false 4bhb_ModifiedTroubledDebtRestructuringsResultingInDefaultbhb_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse213000213USD$falsetruefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalse14falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryModified Troubled Debt Restructurings Resulting In DefaultNo definition available.false2Modified Troubled Debt Restructurings Resulting In Default7false 4bhb_NumberOfRelationshipsToLoansClassifiedAsTroubledDebtRestructuringsbhb_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse88falsefalsefalse2truefalsefalse44falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalse14falsefalsefalse00falsefalsefalsexbrli:positiveIntegerItemTypepositiveintegerNumber Of Relationships To Loans Classified As Troubled Debt RestructuringsNo definition available.false256Number of relationships to loans classified as troubled debt restructurings8false 4bhb_NumberOfYearsForWhichPrincipallyCollateralizedLoansAreAmortizedbhb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse0020 yearsfalsefalsefalse6falsefalsefalse0030 yearsfalsefalsefalse7falsefalsefalse0015 yearsfalsefalsefalse8falsefalsefalse0010 yearsfalsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalse14falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaNumber of years for which principally collateralized loans are amortized.No definition available.false0Number of years for which principally collateralized loans are amortized9false 4bhb_PercentageOfCommercialRealEstateMortgagePortfoliobhb_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.3340.334falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalse5falsetruefalse00falsefalsefalse6falsetruefalse00falsefalsefalse7falsetruefalse00falsefalsefalse8falsetruefalse00falsefalsefalse9falsetruefalse00falsefalsefalse10falsetruefalse00falsefalsefalse11falsetruefalse00falsefalsefalse12falsetruefalse00falsefalsefalse13falsetruefalse00falsefalsefalse14falsetruefalse00falsefalsefalsenum:percentItemTypepurePercentage of commercial real estate mortgage portfolio.No definition available.false0Percentage of commercial real estate mortgage portfolio10false 4bhb_PercentageOfAppraisedValueOfResidentialRealEstateLoansbhb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4truetruefalse0.800.80falsefalsefalse5falsetruefalse00falsefalsefalse6falsetruefalse00falsefalsefalse7falsetruefalse00falsefalsefalse8falsetruefalse00falsefalsefalse9falsetruefalse00falsefalsefalse10falsetruefalse00falsefalsefalse11falsetruefalse00falsefalsefalse12falsetruefalse00falsefalsefalse13falsetruefalse00falsefalsefalse14falsetruefalse00falsefalsefalsenum:percentItemTypepurePercentage of appraised value of residential real estate loans.No definition available.false0Percentage of appraised value of residential real estate loans11false 4us-gaap_NotesReceivableNetus-gaap_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:monetaryItemTypemonetaryNet 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.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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 false2Loans12false 4us-gaap_FinancingReceivableModificationsRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse11790001179falsefalsefalse10truefalsefalse934000934falsefalsefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalse14falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18845-111554 false2Loans to relationships classified as TDRs, Total13false 4us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse339000339USD$falsetruefalse10truefalsefalse114000114USD$falsetruefalse11falsefalsefalse00falsefalsefalse12falsefalsefalse00falsefalsefalse13falsefalsefalse00falsefalsefalse14falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953682-111524 false2TDRs past due and classified as non-performing, total amountfalseLoans And Allowance For Loan Losses (Narrative) (Details) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.bhbt.com/2011-03-31/role/DisclosureLoansAndAllowanceForLoanLossesNarrativeDetails1413