XML 48 R36.htm IDEA: XBRL DOCUMENT v2.4.1.9
Securities Available For Sale (Narrative) (Details) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
security
Mar. 31, 2014
Dec. 31, 2014
Schedule of Available for sale Securities [Line Items]      
Securities recognized as credit losses in excess of the unrealized losses in accumulated OCI, creating an unrealized gain 11bhb_SecuritiesRecognizedAsCreditLossesInExcessOfUnrealizedLossesInAccumulatedOtherComprehensiveIncomeResultingInUnrealizedGain    
Total other-than-temporary impairment ("OTTI") losses $ 0us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount $ 0us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount  
Unrealized gain, net of tax 411,000us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax   478,000us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax
OTTI recognized in pre-tax earnings amount, net of tax 411,000us-gaap_AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxDebtSecurities   478,000us-gaap_AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxDebtSecurities
Unrealized losses on securities 1,413,000us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss   2,332,000us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
Obligations Of States And Political Subdivisions Thereof [Member]      
Schedule of Available for sale Securities [Line Items]      
Unrealized losses on securities 294,000us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
  252,000us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
Private Label Mortgage-Backed Securities [Member]      
Schedule of Available for sale Securities [Line Items]      
Private-label MBS (debt securities), amount held 12bhb_PrivateLabelMortgageBackedSecuritiesAmountHeld
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
   
Amortized cost included OTTI losses 1,577,000us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetHeldtomaturitySecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
   
Unrealized losses on securities 16,000us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
  14,000us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
US Government Agency [Member]      
Schedule of Available for sale Securities [Line Items]      
Unrealized losses on securities 270,000us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
  529,000us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= bhb_MortgageBackedSecuritiesIssuedByUsGovernmentAgencyMember
US Government-Sponsored Enterprises [Member]      
Schedule of Available for sale Securities [Line Items]      
Unrealized losses on securities $ 833,000us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
  $ 1,537,000us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember