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Securities Available For Sale (Schedule Of Fair Value Of Securities With Continuous Unrealized Losses) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014 security	Dec. 31, 2013 security
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	$ 78,188us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	$ 209,525us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	109bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsNumberOfInvestments	334bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsNumberOfInvestments
Securities with continuous unrealized loss position, Less than 12 months, Unrealized Losses	1,898bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments	12,445bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	42,037us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	58,632us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	75bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerNumberOfInvestments	89bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerNumberOfInvestments
Securities with continuous unrelaized loss position, 12 months or longer, Unrealized Losses	434bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments	6,185bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments
Securities with continuous unrealized losses, Estimated Fair Value	120,225us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	268,157us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Securities with continuous unrealized losses, Number of Investments	184us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	423us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
Securities with continuous unrealized loss position, Total, Unrealized Losses	2,332bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments	18,630bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments
US Government-Sponsored Enterprises [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	45,899us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	111,169us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	53bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	140bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Securities with continuous unrealized loss position, Less than 12 months, Unrealized Losses	1,168bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	4,801bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	35,511us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	40,563us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	45bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	40bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Securities with continuous unrelaized loss position, 12 months or longer, Unrealized Losses	369bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	3,791bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Securities with continuous unrealized losses, Estimated Fair Value	81,410us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	151,732us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Securities with continuous unrealized losses, Number of Investments	98us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	180us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Securities with continuous unrealized loss position, Total, Unrealized Losses	1,537bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	8,592bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
US Government Agency [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	19,404us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember	36,356us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	24bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember	47bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
Securities with continuous unrealized loss position, Less than 12 months, Unrealized Losses	483bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember	1,982bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	3,657us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember	9,156us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	21bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember	12bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
Securities with continuous unrelaized loss position, 12 months or longer, Unrealized Losses	46bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember	475bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
Securities with continuous unrealized losses, Estimated Fair Value	23,061us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember	45,512us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
Securities with continuous unrealized losses, Number of Investments	45us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember	59us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
Securities with continuous unrealized loss position, Total, Unrealized Losses	529bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember	2,457bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
Private Label [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	336us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember	826us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	4bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember	12bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Securities with continuous unrealized loss position, Less than 12 months, Unrealized Losses	7bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember	61bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	145us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember	449us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	4bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember	7bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Securities with continuous unrelaized loss position, 12 months or longer, Unrealized Losses	7bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember	17bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Securities with continuous unrealized losses, Estimated Fair Value	481us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember	1,275us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Securities with continuous unrealized losses, Number of Investments	8us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember	19us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Securities with continuous unrealized loss position, Total, Unrealized Losses	14bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember	78bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Obligations Of States And Political Subdivisions Thereof [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	12,549us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	61,174us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	28bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	135bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Securities with continuous unrealized loss position, Less than 12 months, Unrealized Losses	240bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	5,601bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	2,724us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	8,464us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	5bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	30bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerNumberOfInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Securities with continuous unrelaized loss position, 12 months or longer, Unrealized Losses	12bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	1,902bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Securities with continuous unrealized losses, Estimated Fair Value	15,273us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	69,638us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Securities with continuous unrealized losses, Number of Investments	33us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	165us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Securities with continuous unrealized loss position, Total, Unrealized Losses	$ 252bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	$ 7,503bhb_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember

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- Definition

Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer impacting investments.

+ References

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Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale impacting investments.

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Amount of accumulated pre-tax unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months impacting investments.

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No definition available.

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Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the available-for-sale investments determined to be temporarily impaired for less than twelve months.

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Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the available-for-sale investments determined to be temporarily impaired for twelve months or longer.

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This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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-Section 50

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+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

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-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563



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Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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