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Goodwill And Other Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014 | Aug. 10, 2012
Schedule Of Goodwill And Other Intangible Assets [Line Items] |  |  |
Goodwill | $ 4,935 us-gaap_Goodwill | $ 4,935 us-gaap_Goodwill |
Core deposit intangible asset, estimated life | 8 years 6 months |  |
Balance of core deposit intangibles | 539 us-gaap_FiniteLivedIntangibleAssetsNet | 562 us-gaap_FiniteLivedIntangibleAssetsNet |
Expected amortization for 2015 | 92 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths |  |
Expected amortization for 2016 | 92 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo |  |
Expected amortization for 2017 | 92 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree |  |
Expected amortization for 2018 | 92 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour |  |
Expected amortization for 2019 | 92 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive |  |
Expected amortization for 2020 | 92 bhb_FiniteLivedIntangibleAssetsAmortizationExpenseYearSix |  |
Expected amortization for 2021 | 8 bhb_FiniteLivedIntangibleAssetsAmortizationExpenseYearSeven |  |
Border Trust Company [Member] |  |  |
Schedule Of Goodwill And Other Intangible Assets [Line Items] |  |  |
Goodwill |  |  | $ 1,777 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = bhb_BorderTrustCompanyMember

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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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